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<tr><td class="hdrl">&nbsp;Elliott Sound Products</td>
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<h1>ESP Site Map</h1>
<p align="center">All Material &copy; 1998-2024 Rod Elliott (ESP)<br />
<small>Copyright For Each Individual Article Is Shown At The End Of Each Page<br />
Page Last Updated - September 2024</small></p>
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<table style="width:90%;" align="center">
<tr><td width="49%"><b>Indexes</b><hr />
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<tr><td width="49%"><br />
<a href="index.html">Main Index</a><br />
<a href="articles.htm">Articles Index</a><br />
<a href="projects.htm">Projects Index</a><br />
<br /><hr /><b>Articles</b><hr />
<a href="articles/555-timer.htm">555 Timer Applications</a><br />
<a href="articles/6db-xover.htm">6dB Speaker Crossovers</a><br />
<a href="articles/active-filters.htm">Active Filters</a><br />
<a href="biamp-vs-passive.htm">Active Vs. Passive Crossovers</a><br />
<a href="absw.htm">A-B Blind Comparator</a><br />
<a href="abx-tester.htm">ABX Test Set</a><br />
<a href="articles/acoustic-feedback.htm">Acoustic Feedback &amp; Frequency Shifting</a><br />
<a href="articles/gyrator-filters.htm">Active Filters Using Gyrators</a><br />
<a href="articles/am-radio.htm">AM Radio - Wideband/ Hi-Fi</a><br />
<a href="articles/am-modulation.htm">Amplitude Modulation For Simulations</a><br />
<a href="amp-basics.htm">Amplifier Basics - Intro</a><br />
<a href="amp-basics1.htm">Amplifier Basics - Part 1</a><br />
<a href="amp-basics2.htm">Amplifier Basics - Part 2</a><br />
<a href="amp-basics3.htm">Amplifier Basics - Part 3</a><br />
<a href="amp-basics4.htm">Amplifier Basics - Part 4</a><br />
<a href="amp-basics5.htm">Amplifier Basics - Part 5</a><br />
<a href="amp-basics6.htm">Amplifier Basics - Part 6</a><br />
<a href="bridging.htm">Amplifier Bridging</a><br />
<a href="articles/amp-classes.htm">Amplifier Classes - Class-A, Class-B, etc.</a><br />
<a href="amp_design.htm">Amplifier Design</a><br />
<a href="efficiency.htm">Amplifier Efficiency</a><br />
<a href="articles/amp-power.htm">Amplifier Power - How much do you need</a><br />
<a href="troubleshooting.htm">Amplifier Troubleshooting</a><br />
<a href="articles/troubleshoot2.htm">Amplifier Troubleshooting - Part 2</a><br />
<a href="vi.htm">Amplifier Protection</a><br />
<a href="amp-sound.htm">Amplifier Sound</a><br />
<a href="articles/arc-prevention.htm">Arc Prevention For Switching Circuits</a><br />
<a href="articles/analogue-vs-digital.htm">Analogue Vs. Digital</a><br />
<a href="articles/a-weighting.html">A-Weighting (and why it's wrong)</a><br />
<br /><a href="bafflestep.htm">Baffle Step EQ</a><br />
<a href="balance.htm">Balanced Circuits</a><br />
<a href="articles/balanced-2.htm">Balanced Circuits Part II</a><br />
<a href="articles/balanced-io.htm">Balanced Circuits Part III</a><br />
<a href="articles/balanced-4.htm">Balanced Circuits Part IV</a><br />
<a href="beginners.htm">Beginners Guide to Components</a><br />
<a href="bi-amp.htm">Bi-Amplification (Part I)</a><br />
<a href="bi-amp2.htm">Bi-Amplification (Part II)</a><br />
<a href="articles/bjt-parameters.htm">BJT Parameters</a><br />
<a href="articles/bleeders.htm">Bleeder Resistors in PSUs</a><br />
<a href="articles/bootstrap.htm">Bootstrap Circuits</a><br />
<a href="articles/buck-xfmr.htm">Bucking Transformers</a><br />
<a href="bulletinboards.htm">Bulletin Boards</a><br />
<a href="articles/buyingparts.htm">Buying Electronic Components</a><br />
<br /><a href="cables.htm">Cables - Part 1</a><br />
<a href="cables-p2.htm">Cables - Part 2</a><br />
<a href="cables-p3.htm">Cables - Part 3</a><br />
<a href="cables-p4.htm">Cables - Part 4</a><br />
<a href="cables-p5.htm">Cables - Part 5</a><br />
<a href="cables-p6.htm">Cables - Part 6</a><br />
<a href="cable-z.htm">Cable Impedance</a><br />
<a href="cablewhitepaper.htm">Cable Information</a><br />
<a href="articles/capacitors.htm">Capacitors in Depth</a><br />
<a href="articles/cap-coupling.htm">Capacitor Coupling In Output Stages</a><br />
<a href="articles/cap-multiplier.htm">Capacitance Multipliers</a><br />
<a href="articles/line-amps.html">Commercial Sound (70-100V Lines)</a><br />
<a href="articles/cmpd-vs-darl.htm">Compound (Sziklai) Vs. Darlington pairs</a><br />
<a href="articles/comparators.htm">Comparators - The Unsung Heroes Of Electronics</a><br />
<a href="articles/coupling-caps.htm">Coupling Capacitors</a><br />
<a href="articles/coax.htm">COAX - Introduction To Coaxial Cables</a><br />
<a href="articles/current-drive.htm">Current Drive Power Amps &amp; Effects on Speaker Drivers</a><br />
<a href="cd-sacd-dvda.htm">CD Vs. SACD Vs. DVDA</a><br />
<a href="class-a.htm">Class-A Amplifiers</a><br />
<a href="class-a.htm">Class-A Amplifiers - Part 2</a><br />
<a href="articles/pwm.htm">Class-D Amplifier Theory &amp; Design</a><br />
<a href="articles/class-d2.htm">Class-D Amplifiers (Part II)</a><br />
<a href="articles/class-g.htm">Class-G Amplifiers</a><br />
<a href="articles/cscaling.htm">Compliance Scaling Loudspeakers</a><br />
<br /><a href="compression.htm">Compression in Audio</a><br />
<a href="counterfeit.htm">Counterfeit Transistors</a><br />
<a href="articles/crossover-distortion.htm">Crossover Distortion</a><br />
<a href="articles/cfb-vs-vfb.htm">CFB Vs. VFB (Current Vs Voltage Feedback)</a><br />
<a href="articles/current-monitors.htm">Current Monitors - Detection &amp; Measurement</a><br />
<a href="ism.htm">Current Sources, Sinks &amp; Mirrors</a><br />
<br /><a href="articles/dangerous.htm">Dangerous Power Supplies</a><br />
<a href="articles/dc-servo.htm">DC Servos - Tips, Traps &amp; Applications</a><br />
<a href="articles/derived-xovers.htm">Derived (Subtractive) Crossover Networks</a><br />
<a href="dwopa.htm">Designing with Opamps - Part 1</a><br />
<a href="dwopa2.htm">Designing with Opamps - Part 2</a><br />
<a href="articles/dwopa3.htm">Designing with Opamps - Part 3</a><br />
<a href="articles/distortion+fb.htm">Distortion &amp; Negative Feedback</a><br />
<a href="articles/distortion.htm">Distortion - What It Is, How It's Measured</a><br />
<a href="doppler.htm">Doppler distortion in Loudspeakers</a><br />
<a href="articles/dsp.htm">DSP - Digital Signal Processing in Audio</a><br />
<br /><a href="earthing.htm">Earthing (Grounding) Techniques</a><br />
<a href="articles/mic-electret.htm">Electret Microphones, Powering &amp; Uses</a><br />
<a href="tools.htm">Electronics Tools</a><br />
<a href="articles/electrocution.htm">Electrocution &amp; How To Avoid It</a><br />
<a href="articles/mic-electret.htm">Electret Microphones</a><br />
<a href="articles/e-fuses.htm">Electronic Fuses</a><br />
<a href="articles/eq.htm">Equalisation &amp; How It Works</a><br />
<a href="articles/esd-protection.htm">ESD Protection</a><br />
<a href="articles/essential.htm">Essential Formulae For Electronics</a><br />
<a href="articles/external-psu.htm">External Power Supplies - New Regulations</a><br />
<br /><a href="articles/fet-applications.htm">FET Applications</a><br />
<a href="articles/jfet-design.htm">FET Circuit Design Process</a><br />
<a href="articles/followers.html">Followers &amp; Buffers, Various Techniques Examined</a><br />
<a href="articles/fadb.htm">Frequency, Amplitude and dB</a><br />
<a href="articles/fusing.htm">Fusing &amp; Circuit Protection</a><br />
<br /><a href="glossary.htm">Glossary of Terms</a><br />
<a href="articles/guitar-amps.htm">Guitar Amps - Repair or Replace</a><br />
<a href="articles/guitar-speakers.htm">Guitar Speakers - Getting 'the sound'</a><br />
<a href="articles/guitar-voltage.htm">Guitar Pickup Voltages</a><br />
<br /><a href="heatsinks.htm">Heatsinks</a><br />
<a href="articles/heatsink-amp.htm">Heatsinks - Selection For Amplifiers</a><br />
<!--a href="pcb/heatsink.htm">Heatsink - ESP Extrusion</a><br /-->
<a href="articles/diy-heatsink.htm">Heatsinks - DIY</a><br />
<a href="articles/hexfet.htm">HEXFET Audio Amplifiers</a><br />
<a href="highspeed.htm">High Speed Opamps</a><br />
<a href="articles/hybrid-relays.htm">Hybrid Relays</a><br />
<br />
<a href="articles/ic+boost.htm">IC Power Amplifiers - more power by adding transistors</a><br />
<a href="impedanc.htm">Impedance</a><br />
<a href="articles/z-compensation.htm">Impedance Compensation for Loudspeakers</a><br />
<a href="z-effects.htm">Impedance Effects</a><br />
<a href="articles/lc-oscillators.htm">Inductor/ Capacitor Oscillators</a><br />
<a href="instamps.htm">Instrument Amplifiers</a><br />
<a href="articles/intermodulation.htm">Intermodulation Distortion - sum &amp; difference frequencies</a><br />
<a href="articles/intermodulation2.htm">Intermodulation Distortion - measurement techniques &amp; effects</a><br />
<a href="articles/incandescent.htm">Incandescent Lamp Ban</a><br />
<a href="articles/inrush.htm">Inrush Current Mitigation</a><br />
<a href="pots.htm">Introduction to Potentiometers</a><br />
<a href="articles/inrush-testing.htm">Inrush Current Testing</a><br />
<a href="articles/inverters.htm">Inverters - different types explained</a><br />
<br /><a href="jll_hood.htm">JLL Hood Class-A Amp</a><br />
<a href="linkwitz-transform.htm">Linkwitz Transform</a><br />
<a href="articles/ldo-regulators.htm">LDO (Low Dropout) Voltage Regulators</a><br />
<a href="articles/lithium-charging.htm">Lithium Cell Charging &amp; Battery Management</a><br />
<a href="articles/lm358.htm">LM358/ LM324 Opamp Distortion Reduction</a><br />
<a href="articles/lock-in-amps.htm">Lock-In Amplifiers</a><br />
<a href="articles/logic.htm">Logic - A Beginners Guide</a><br />
<a href="articles/crossover-tables.htm">Loudspeaker Crossover Design Tables</a><br />
<a href="articles/ac-offset.htm">Loudspeaker Acoustic Centre Offset</a><br />
<a href="articles/enclosures.htm">Loudspeaker Enclosure Design Guidelines</a><br />
<a href="articles/l-pad-calc.htm">Loudspeaker L-Pad Calculations</a><br />
<a href="articles/pwr-vs-eff.htm">Loudspeaker Power vs. Efficiency</a><br />
<br />
<a href="articles/mains-quality.htm">Mains Power Quality</a><br />
<a href="articles/mains-safety.htm">Mains Safety (Essential Reading)</a><br />
<a href="articles/maths-functions.htm">Mathematical Functions Using Analogue Circuits</a><br />
<a href="articles/meter-atten.htm">Meter Attenuators</a><br />
<a href="articles/meters.htm">Meters, Multipliers &amp; Shunts</a><br />
<a href="articles/microphones.htm">Microphones</a><br />
<a href="articles/microphones-2.htm">Microphones (Part II)</a><br />
<a href="articles/mic-splitting.htm">Microphone Signal Splitters</a><br />
<a href="miscc.htm">Miscellaneous Components</a><br />
<a href="articles/audio-mixing.htm">Mixing Principles, Active &amp; Passive</a><br />
<a href="articles/mosfet-relay.htm">MOSFET Relays</a><br />
<a href="articles/morse-code.htm">Morse Code</a><br />
<a href="articles/motors.htm">Motors - AC and DC</a><br />
<a href="articles/multimeters.htm">Multimeters - Analogue &amp; Digital</a><br />
<a href="articles/myths.html">Myths in Audio</a><br />
<br /><a href="articles/negative-z.htm">Negative Impedance</a><br />
<a href="articles/ntm-xover.htm">Neville Thiele Method (NTM&trade;) Crossovers</a><br />
<a href="noise.htm">Noise in Audio Circuits</a><br />
<a href="articles/notch-filters.htm">Notch Filters</a><br />
<br /><a href="articles/smps2.htm">Off-Line Flyback Power Supplies</a><br />
<a href="no-opamps.htm">Opamp Alternative Circuits</a><br />
<a href="articles/opamp-history.htm">Opamp History</a><br />
<a href="articles/frequency-vs-gain.htm">Opamps - Frequency Vs. Gain &amp; Slew Rate</a><br />
<a href="articles/oscilloscope.htm">Oscilloscopes. How They Work And Usage</a><br />
<a href="articles/overvoltage.htm">Over-Voltage Protection</a><br />
<br /><a href="https://sound-au.com/articles/articles-psu.htm">Power Supply Design Index</a><br />
<a href="lr-passive.htm">Passive Crossovers</a><br />
<a href="articles/patents.htm">Patents - General Information</a><br />
<a href="articles/pllxo.htm">Passive Line Level Crossovers</a><br />
<a href="articles/p-48.htm">Phantom Power - What It Is And How It Works</a><br />
<a href="patd.htm">Phase Angle Vs. Transistor Dissipation</a><br />
<a href="pcmm.htm">Phase Correction - Myth or Magic?</a><br />
<a href="ptd.htm">Phase, Time &amp; Distortion</a><br />
<a href="articles/phone-jacks.htm">Phone Plugs and Sockets</a><br />
<a href="clipping.htm">Power Amplifier Clipping Behaviour</a><br />
<a href="articles/pwr-amp-dev.htm">Power Amplifier Development Over The Years</a><br />
<a href="power.htm">Power Ratings</a><br />
<a href="power-supplies.htm">Power Supply Design</a><br />
<a href="articles/psu-simulation.htm">Power Supply Simulation</a><br />
<a href="articles/psu-snubber.htm">Power Supply Snubbers</a><br />
<a href="articles/psu-snubber2.htm">Power Supply Snubbers II</a><br />
<a href="articles/power-supply-4.htm">Power Supply Design (Part II)</a><br />
<a href="articles/preregulators.htm">Pre-Regulators</a><br />
<a href="articles/sustainability.htm">Projects, DIY &amp; Sustainability</a><br />
<br />
<a href="articles/rectifiers.htm">Rectifiers - Selection &amp; Usage</a><br />
<a href="articles/relays.htm">Relays - Part 1</a><br />
<a href="articles/relays2.htm">Relays - Part 2</a><br />
<a href="articles/relays3.htm">Relays - Part 3</a><br />
<a href="articles/reverb.htm">Reverberation Tanks</a><br />
<a href="hfr_be.htm">Review of BE Valve Amplifier</a><br />
<br /><a href="qb5align.htm">Satellites &amp; Subs (QB5 Alignment)</a><br />
<a href="soa.htm">Safe Operating Area (SOA)</a><br />
<a href="articles/sinewave.htm">Sinewave Oscillators - Characteristics, Topologies, Examples</a><br />
<a href="articles/servos.htm">Servos - Hobby Servos, ESCs And Tachometers</a><br />
<a href="subcon.htm">(The) Subwoofer Conundrum</a><br />
<a href="parallel-series.htm">Series vs. Parallel Crossovers</a><br />
<a href="articles/power-supplies2.htm">Small Power Supplies (Part I) - Low Current, Including 'Off-Line'</a><br />
<a href="articles/power-supplies3.htm">Small Power Supplies (Part 1I) - Transient Response &amp; Noise</a><br />
<a href="articles/ssl1.htm">Small Satellite Speaker (Part 1)</a><br />
<a href="articles/ssl2.htm">Small Satellite Speaker (Part 2)</a><br />
<a href="articles/ssl3.htm">Small Satellite Speaker (Part 3)</a><br />
<a href="articles/soft-clip.htm">Soft Clipping Circuits</a><br />
<a href="articles/soft-start.htm">Soft Start Circuits</a><br />
<a href="articles/ss-relays.htm">Solid State Relays</a><br />
<a href="sim.htm">Sound Impairment Monitor</a><br />
<a href="articles/sound-illusion.htm">Sound - Illusion?</a><br />
<a href="articles/state-variable.htm">State Variable Filters</a><br />
<a href="articles/speaker-failure.html">Speaker Failure</a><br />
<a href="articles/squarewave.htm">Squarewave Testing Amps &amp; Filters</a><br />
<a href="manufacture.htm">State of Manufacture</a><br />
<a href="articles/smps2.htm">Switchmode Power Supplies (Part II)</a><br />
<a href="articles/sw-debounce.htm">Switch De-Bounce Techniques</a><br />
<br /><a href="transistor-matching.htm">Transistor Matching</a><br />
<a href="trans.htm">Transistor listing</a><br />
<a href="articles/xfmr-dc.htm">Transformers and mains DC offset</a><br />
<a href="xfmr.htm">Transformers - Part 1</a><br />
<a href="xfmr2.htm">Transformers - Part 2</a><br />
<a href="articles/xfmr3.htm">Transformers - Part 3</a><br />
<a href="articles/xfmr4.htm">Transformers - Part 4</a><br />
<a href="articles/variac.htm">Transformers - The Variac</a><br />
<a href="articles/audio-xfmrs.htm">Transformers for 'Line Level' Audio</a><br />
<a href="articles/xfmrless-psu.htm">Transformerless PSUs</a><br />
<a href="https://sound-au.com/thermistor-selection.htm">Thermistor Selection</a><br />
<a href="tsp.htm">Thiele-Small Parameters</a><br />
<a href="articles/phase.htm">Time Alignment With Phase Shift Networks</a>
<a href="sp-boxes.htm">Triamped Speaker System - Part 1</a><br />
<a href="sp-boxes2.htm">Triamped Speaker System - Part 2</a><br />
<br /><a href="vda.htm">Voltage Dividers &amp; Attenuators</a>
<br /><a href="articles/boxstuff.htm">Volume Filling Reflex Enclosures</a><br />
<br /><a href="tweeters.htm">What Makes Tweeters Blow</a><br />
<a href="whatis.htm">What Is Hi-Fi</a><br />
<a href="why-diy.htm">Why Do It Yourself?</a><br />
<a href="psu-wiring.htm">Wiring A Power Supply</a><br />
<a href="articles/waveguides1.htm">Waveguides, Part 1</a><br />
<a href="articles/waveguides2.htm">Waveguides, Part 2</a><br />
<a href="articles/waveguides3.htm">Waveguides, Part 3</a><br /><br />
<a href="articles/yellow-glue.htm">Yellow Glue</a><br />
<br /><br /><hr /><b>Valves</b><hr />
<a href="valves/index.html">Valve Articles Index</a><br />
<a href="hfr_be.htm">Valve Amps - Do they really sound different?</a><br />
<a href="valves/valveintro.html">Valve intro - types, terminology, etc.</a><br />
<a href="valves/bias-gain.html">Bias and Gain</a><br />
<a href="valves/analysis.html">Valve Stage Analysis</a><br />
<a href="valves/design.html">Design Considerations - Part 1</a><br />
<a href="valves/design2.html">Design Considerations - Part 2</a><br />
<a href="valves/preamps.html">Low Distortion Preamps</a><br />
<a href="valves/myths.html">Valve Myths</a><br />
<a href="project151.htm">High Voltage DC Supply</a><br />
<a href="valves/ht-delay.html">High Voltage Time Delay</a><br />
<br /><br /><hr /><b>Application Notes</b><hr />
<a href="appnotes/index.html">Application Notes Index</a><br />
<a href="appnotes/an001.htm">Precision Rectifiers</a><br />
<a href="appnotes/an002.htm">Analogue Metering Amplifiers</a><br />
<a href="appnotes/an003.htm">High Power Led SMPS</a><br />
<a href="appnotes/an004.htm">Car Dome Light Extender</a><br />
<a href="appnotes/an005.htm">Zero Crossing Detectors</a><br />
<a href="appnotes/an006.htm">Ultra-Simple SMPS</a><br />
<a href="appnotes/an007.htm">Transistor Assisted Zener</a><br />
<a href="appnotes/an008.htm">Using Zener Diodes</a><br />
<a href="appnotes/an009.htm">DC Motor Speed Controller</a><br />
<a href="appnotes/an009-2.htm">DC Motor Speed Controller (II)</a><br />
<a href="appnotes/an010.htm">2-Wire/4-Wire Converters</a><br />
<a href="appnotes/an011.htm">4-20mA Current Loop Interfaces</a><br />
<a href="appnotes/an012.htm">Peak, Average and RMS Measurements</a><br />
<a href="appnotes/an013.htm">Reverse Polarity Protection</a><br />
<a href="appnotes/an014.htm">Peak Detection Circuits</a><br />
<a href="appnotes/an015.htm">Input Overvoltage Protection</a><br />
<a href="appnotes/an016.htm">Measuring Ultra-High Resistance</a><br />
<a href="appnotes/an017.htm">DC Detectors For Loudspeaker Protection</a><br />
<a href="appnotes/an018.htm">Ultra-Low Leakage Diodes</a><br />
<a href="appnotes/an019.htm">'Zero Power' LED battery Indicator</a><br />
<a href="appnotes/an020.htm">Mains Peak Voltage Detectors</a><br />
<br /><br /><hr /><b>Purchases</b><hr />
<a href="purchase.htm">Ordering Info</a><br />
<a href="https://sound-au.com/pcb/pricelist.html">Price List</a><br />
<a href="readymade.htm">Fully Built Modules</a><br />
<a href="m27a.htm">Guitar Amp Module</a><br />
<a href="df100.htm">Digital Flash Module</a><br />
<a href="vp103.htm">VP-103 Valve Preamp</a><br />
<a href="paypal.htm">PayPal Details</a><br />
<a href="wu.htm">Western Union Details</a><br />
<a href="deadletter.htm">Dead Letters</a><br />
<br /><br /><hr /><b>Clocks</b><hr />
<a href="clocks/clock-components.html">Clock Components</a><br />
<a href="clocks/motors.html">Clock Motors</a><br />
<a href="clocks/kundo.html">Kundo Battery Clocks</a><br />
<a href="clocks/ocm.html">Old Synchronous Motors</a><br />
<a href="clocks/freq-changer.html">Frequency Changer</a><br />
<a href="clocks/sync.html">Build a Synchronous Clock</a><br />
<a href="clocks/free-pendulum.html">Free Pendulum Clock</a><br />
<a href="clocks/1v5supply.html">1.5V Mains Supply</a><br />
<a href="clocks/magnet-charger.html">Magnet Charger</a><br />
<a href="clocks/fluxmeter.html">Simple Flux Meter</a><br />
<a href="clocks/spark-q.html">Spark Quench Circuits</a><br />
<a href="clocks/timebase.html">1 second timebase</a><br />
<a href="clocks/demagnetiser.html">Fast Demagnetiser</a><br />
<a href="clocks/arduino.html">Arduino Based Slave Clock Driver</a><br /><br />
<br /><br /><hr /><b>Gallery</b><hr />
<a href="https://sound-au.com/gallery/gallery.htm">Gallery Index</a><br />
<a href="project09a.htm">L-R Crossover (2)</a><br />
<a href="readers.htm">Reader Feedback - Part 1</a><br />
<a href="readers2.htm">Reader Feedback - Part 2</a><br />
<br /><br /><hr /><b>Downloads</b><hr />
<a href="software/esp-lr13.exe">Crossover Calculator (EXE)</a><br />
<a href="download.htm">Download Index</a><br />
<a href="heatsink.zip">Heatsink Calculator (ZIP)</a><br />
<a href="heatsink.xls">Heatsink Design (XLS)</a><br />
<a href="lm3915.zip">LED LM3915 VU Design (ZIP)</a><br />
<a href="mfb-filter.exe">MFB Filter Calculator (EXE)</a><br />
<a href="ls-param.zip">Loudspeaker Parameters (ZIP)</a><br />
<a href="xover.zip">Crossover Design (ZIP)</a><br />
<a href="linkxfrm.zip">Linkwitz Transform Design (ZIP)</a><br />
<a href="cron.exe">PC Timer Program (EXE)</a><br />
<a href="reminder.exe">Reminder Program (EXE)</a><br />
<a href="esp-semi.exe">Semiconductor Data (EXE)</a><br />
<a href="software/parR-main.zip">Serial/ Parallel Resistor Calc. (ZIP)</a><br />
<a href="articles/transformer1.zip">Transformer analysis program (ZIP)</a><br />
<a href="articles/transformer2.zip">Transformer analysis spreadsheet (ZIP)</a><br />
<a href="articles/transformer3.zip">Transformer design program (ZIP)</a><br />
<br /><br /><hr /><b>Humour</b><hr />
<a href="humour.htm">Humour Index</a><br />
<a href="jokes.htm">Humour - Part 1</a><br />
<a href="jokes2.htm">Humour - Part 2</a><br />
<a href="laws.htm">Murphy's Laws</a><br />
<a href="hal9000.htm">A Space Oddity</a><br />
<a href="os_air.htm">If Your O/S Were an Airline</a><br />
<a href="matilda.htm">Waltzing Matilda Explained</a><br />
<a href="python.htm">Monty Python</a><br />
<a href="dynamic-range.htm">Dynamic Range Vs. Ambient Noise</a><br />
<a href="satcure/scam.htm">Satcure Products</a><br />
<br /><br /><hr /><b>Miscellaneous</b><hr />
<a href="shame.htm">Hall of Shame</a><br />
<a href="index.html">Home Page</a><br />
<a href="index.html">Main Index</a><br />
<a href="audiolink.htm">Main Links Page</a><br />
<a href="madashell.htm">Mad As Hell - Part 1</a><br />
<a href="madashell10.htm">Mad As Hell - Part 2</a><br />
<a href="madashell9.htm">Mad As Hell - Part 3</a><br />
<a href="madashell8.htm">Mad As Hell - Part 4</a><br />
<a href="ethics.htm">ESP Ethics Policy</a><br />
<a href="about.htm">About ESP Site</a><br />
<a href="https://sound-au.com/contact.htm">Contact the Author</a><br />
<a href="https://sound-au.com/forms/submit-form.htm">Submit Your Material</a><br />
<a href="contract.htm">Contracting Details</a><br />
<a href="author.htm">About the Author</a><br />
<a href="schools.htm">Custom Projects for Education</a><br />
<a href="faq.htm">Frequently Asked Questions</a><br />
<a href="spam.htm">Spam, Scams &amp; Security</a><br />
<a href="sss/scam.htm">Scams - how they work</a><br />
<a href="security.htm">Your on-line security</a><br />
<a href="sss/spam.htm">Spam, Spam, Spam, Spam</a><br />
<a href="disclaimer.htm">Disclaimer</a><br />
<a href="wsearch.htm">Search Page</a><br />
<a href="contrib.htm">Contribute Project/ Article</a><br />
<a href="estimates.htm">Project Cost Estimates</a><br />
<br /><br />
</td>
<td width="4%" rowspan="5">
<!-- Start of second column -->
<td width="48%" valign="top"><br /><br /><br /><br /><br /><hr />
<b>TCAAS (The Class-A Amplifier Site)</b><hr />
<a href="tcaas/index-1.htm">The JLH Class-A Amplifier</a><br />
<a href="tcaas/index-2.htm">Other JLH Amplifier Designs</a><br />
<a href="tcaas/index-3.htm">Other Class-A Amplifiers</a><br />
<a href="tcaas/index-4.htm">Classic Class-B Schematics</a><br />
<a href="tcaas/index-5.htm">JLH Power Amp Schematics</a><br />
<a href="tcaas/jlharticles.htm">The Published Articles of John Linsley Hood</a><br />
<hr /><b>Lamps, PSUs, Energy</b><hr />
<a href="articles/incandescent.htm">Lamps - Incandescent, etc.</a><br />
<a href="lamps/reactance.html">Capacitance, Inductance &amp; Non-Linear Loads</a><br />
<a href="lamps/dimmers.html">Dimmers</a><br />
<a href="lamps/dimmers2.html">Dimmers - Part 2</a><br />
<a href="lamps/dimmers+leds.html">Dimmers With LED Lighting</a><br />
<a href="lamps/elect-trans.html">Electronic Transformers</a><br />
<a href="lamps/esl-lamps.html">ESL (Electron Stimulated Luminescence) Lamps</a><br />
<a href="articles/external-psu.htm">External Power Supplies</a><br />
<a href="lamps/fluorescent.html">Fluorescent Lamps</a><br />
<a href="lamps/induction.html">Induction Fluorescent Lamps</a><br />
<a href="articles/inrush.htm">Inrush Current Protection</a><br />
<a href="lamps/led-lighting.html">LED Lighting</a><br />
<a href="lamps/thermal.html">LED Lighting - Thermal Design</a><br />
<a href="lamps/sp-lamp.html">Sulphur Plasma Lamps</a><br />
<a href="lamps/power-calc.html">Power Calculations - Watts, VA (AC or DC)</a><br />
<a href="lamps/pfc.html">Power Factor Correction</a><br />
<a href="lamps/power-savers.html">Power Saver Scam</a><br />
<a href="lamps/wind-intro.html">Wind Turbine Introduction</a><br />
<a href="lamps/atkinson-rapley.html">Wind Turbine Noise</a><br />
<br /><br /><hr /><b>Projects</b><hr />
<a href="projects.htm">Projects Index</a><br />
<a href="p-cat.htm">Projects Index by Category</a><br />
<a href="p-list.htm">Project List in Numerical Order</a><br />
<br /><a href="project00.htm">00 &nbsp; Opamp Bypassing</a><br />
<a href="project01.htm">01 &nbsp; Better Volume Control</a><br />
<a href="project02.htm">02 &nbsp; Simple Preamp</a><br />
<a href="project03.htm">02 &nbsp; 60W Power Amp</a><br />
<a href="project04.htm">04 &nbsp; Power Amp Supply</a><br />
<a href="project05.htm">05 &nbsp; Preamp Power Supply</a><br />
<a href="project05a.htm">05A&nbsp;Updated Preamp Power Supply</a><br />
<a href="project05-mini.htm">05-Mini &nbsp; Budget Preamp Power Supply</a><br />
<a href="project06.htm">06 &nbsp; Phono Preamp</a><br />
<a href="project07.htm">07 &nbsp; Discrete Opamp</a><br />
<a href="project08.htm">08 &nbsp; 3rd Order Electronic Crossover</a><br />
<a href="project09.htm">09 &nbsp; Linkwitz-Riley Crossover</a><br />
<br /><a href="project10.htm">10 &nbsp; Class-A Amplifier</a><br />
<a href="project11.htm">11 &nbsp; Pink Noise Generator</a><br />
<a href="project12.htm">12 &nbsp; Current Feedback Power Amp</a><br />
<a href="project12a.htm">12A&nbsp;El-Cheapo Power Amp</a><br />
<a href="project13.htm">13 &nbsp; Low Noise Preamp</a><br />
<a href="project14.htm">14 &nbsp; Power Amp Bridging</a><br />
<a href="project15.htm">15 &nbsp; Capacitance Multiplier</a><br />
<a href="project16.htm">16 &nbsp; Audio Millivoltmeter</a><br />
<a href="project17.htm">17 &nbsp; A-Weighting Filter</a><br />
<a href="project18.htm">18 &nbsp; Surround Decoder</a><br />
<a href="project19.htm">19 &nbsp; 50W IC Power Amp</a><br />
<br /><a href="project20.htm">20 &nbsp; Simple Bridge Adaptor</a><br />
<a href="project21.htm">21 &nbsp; Stereo Width Controllers</a><br />
<a href="project22.htm">22 &nbsp; Audio Oscillator</a><br />
<a href="project23.htm">23 &nbsp; Clipping Indicator</a><br />
<a href="project24.htm">24 &nbsp; Headphone Amplifier</a><br />
<a href="project25.htm">25 &nbsp; Phono Preamps For All</a><br />
<a href="project26.htm">26 &nbsp; Digital Delay</a><br />
<a href="project26a.htm">26A&nbsp;PT2399 Digital Delay</a><br />
<a href="project27.htm">27 &nbsp; Guitar Amp (Original)</a><br />
<a href="project27b.htm">27 &nbsp; Guitar Amp (Part 1)</a><br />
<a href="project27-pix.htm">27 &nbsp; Guitar Amp (Part 2)</a><br />
<a href="project28.htm">28 &nbsp; Quasi-Parametric EQ</a><br />
<a href="project29.htm">29 &nbsp; Tremolo Unit</a><br />
<br /><a href="project30.htm">30 &nbsp; Mixing Desk (Part 1)</a><br />
<a href="project30a.htm">30 &nbsp; Mixing Desk (Part 2)</a><br />
<a href="project30b.htm">30 &nbsp; Mixing Desk (Part 3)</a><br />
<a href="project30c.htm">30 &nbsp; Mixing Desk (Part 4)</a><br />
<a href="project30d.htm">30 &nbsp; Mixing Desk (Part 5)</a><br />
<a href="project31.htm">31 &nbsp; Transistor Tester</a><br />
<a href="project32.htm">32 &nbsp; Car Audio Preamp</a><br />
<a href="project33.htm">33 &nbsp; Speaker Protection and Mute</a><br />
<a href="project34.htm">34 &nbsp; Spring Reverb Unit</a><br />
<a href="project35.htm">35 &nbsp; Direct Injection Box</a><br />
<a href="project36.htm">36 &nbsp; DoZ Class-A Amplifier</a><br />
<a href="project37.htm">37 &nbsp; DoZ Preamp</a><br />
<a href="project38.htm">38 &nbsp; Auto Power-On</a><br />
<a href="project39.htm">39 &nbsp; Soft Start Power Switch</a><br />
<a href="project3a.htm">3A &nbsp; 60W Hi-Fi Power Amp</a><br />
<a href="project3b.htm">3B &nbsp; 25W Class-A Power Amp</a><br />
<br /><a href="project40.htm">40 &nbsp; Load Sensing Auto Switch</a><br />
<a href="project41.htm">41 &nbsp; Opamp Design &amp; Test Board</a><br />
<a href="project42.htm">42 &nbsp; Thermo-Fan Controller</a><br />
<a href="project43.htm">43 &nbsp; Simple DC Split Supply</a><br />
<a href="project44.htm">44 &nbsp; Dual Lab Supply</a><br />
<a href="project45.htm">45 &nbsp; Bass Compressor</a><br />
<a href="project46.htm">46 &nbsp; Thermal Shutdown</a><br />
<a href="project47.htm">47 &nbsp; VOX AC30 Simulator (withdrawn)</a><br />
<a href="project48.htm">48 &nbsp; Sub Equaliser</a><br />
<a href="project49.htm">49 &nbsp; Guitar Vibrato</a><br />
<br /><a href="project50.htm">50 &nbsp; Mic Circuit Tester</a><br />
<a href="project51.htm">51 &nbsp; Balanced Line Drivers</a><br />
<a href="project52.htm">52 &nbsp; Distortion Analyser</a><br />
<a href="project53.htm">53 &nbsp; Power Limiter</a><br />
<a href="project54.htm">54 &nbsp; Low Power FM Transmitter</a><br />
<a href="project55.htm">55 &nbsp; PPM and VU Meters</a><br />
<a href="project56.htm">56 &nbsp; Variable Amp Impedance</a><br />
<a href="project57.htm">57 &nbsp; Sound Impairment Monitor</a><br />
<a href="project58.htm">57 &nbsp; Speaker Measurement Set</a><br />
<a href="project59.htm">59 &nbsp; Self Oscillating Amp</a><br />
<br /><a href="project60.htm">60 &nbsp; LED VU Meter</a><br />
<a href="project61.htm">61 &nbsp; (Withdrawn)</a><br />
<a href="project62.htm">62 &nbsp; Lighting System (Part 1)</a><br />
<a href="project62a.htm">62 &nbsp; Lighting System (Part 2)</a><br />
<a href="project62b.htm">62 &nbsp; Lighting System (Part 3)</a><br />
<a href="project62c.htm">62 &nbsp; Lighting System (Part 4)</a><br />
<a href="project62d.htm">62 &nbsp; Lighting System (Part 5)</a><br />
<a href="project62e.htm">62 &nbsp; Lighting System (Part 6)</a><br />
<a href="project63.htm">63 &nbsp; MFB Filter</a><br />
<a href="project64.htm">64 &nbsp; Instrument Graphic EQ</a><br />
<a href="project65.htm">65 &nbsp; Strobe Light</a><br />
<a href="project66.htm">66 &nbsp; Balanced Mic Preamp</a><br />
<a href="project67.htm">67 &nbsp; Audio Peak Limiter</a><br />
<a href="project68.htm">68 &nbsp; Sub Power Amp</a><br />
<a href="project69.htm">69 &nbsp; Low power +/-12V supply</a><br />
<br /><a href="project70.htm">70 &nbsp; DoZ Headphone Amp</a><br />
<a href="project71.htm">71 &nbsp; Linkwitz Transform Circuit</a><br />
<a href="project72.htm">72 &nbsp; 20W IC Stereo Amp</a><br />
<a href="project73.htm">73 &nbsp; PC Sound System</a><br />
<a href="project74.htm">74 &nbsp; RF Probe</a><br />
<a href="project75.htm">75 &nbsp; Constant Q Graphic EQ</a><br />
<a href="project76.htm">76 &nbsp; Opamp Based Power Amp</a><br />
<a href="project77.htm">77 &nbsp; High Current 13,8V Supply</a><br />
<a href="project78.htm">78 &nbsp; 2nd Order Electronic Crossover</a><br />
<a href="project79.htm">79 &nbsp; Current Sense Power Switch</a><br />
<br /><a href="project80.htm">80 &nbsp; Reverse RIAA Equaliser</a><br />
<a href="project81.htm">81 &nbsp; 12dB L-R Crossover</a><br />
<a href="project82.htm">82 &nbsp; Loudspeaker Test Box</a><br />
<a href="project83.htm">83 &nbsp; MOSFET Follower Amplifier</a><br />
<a href="project84.htm">84 &nbsp; 1/3 Octave Sub Equaliser</a><br />
<a href="project85.htm">85 &nbsp; S/PDIF DAC</a><br />
<a href="project86.htm">86 &nbsp; Mini Audio Oscillator</a><br />
<a href="project87.htm">87 &nbsp; Balanced Transmitters &amp; Receivers</a><br />
<a href="project88.htm">88 &nbsp; Audio Preamp</a><br />
<a href="project89.htm">89 &nbsp; Car Switchmode Supply</a><br />
<br /><a href="project90.htm">90 &nbsp; Dimmer Polarity Reversal</a><br />
<a href="project91.htm">91 &nbsp; 78RPM Phono EQ</a><br />
<a href="project92.htm">92 &nbsp; Guitar and Bass Sustain</a><br />
<a href="project93.htm">93 &nbsp; Recording &amp; Measuring Mic</a><br />
<a href="project94.htm">94 &nbsp; Universal Preamp Mixer</a><br />
<a href="project95.htm">95 &nbsp; Low Power -VE Supply</a><br />
<a href="project96.htm">96 &nbsp; 48V Phantom Supply</a><br />
<a href="project97.htm">97 &nbsp; Hi-Fi Preamp</a><br />
<a href="project98.htm">98 &nbsp; Auto Charger for Battery Hi-Fi</a><br />
<a href="project99.htm">99 &nbsp; 36dB/ Octave Infrasonic ('Subsonic') Filter</a><br />
<br /><a href="project100.htm">100 &nbsp; Headphone Adaptor for Amplifiers</a><br />
<a href="project101.htm">101 &nbsp; 200W MOSFET Power Amplifier</a><br />
<a href="project102.htm">102 &nbsp; Simple Pre-Regulator</a><br />
<a href="project103.htm">103 &nbsp; Subwoofer Phase Control</a><br />
<a href="project104.htm">104 &nbsp; Preamp/ Crossover Mute Circuit</a><br />
<a href="project105.htm">105 &nbsp; Build an Electrostatic Loudspeaker (ESL)</a><br />
<a href="project106.htm">106 &nbsp; h<sub>FE</sub> Tester for Transistors</a><br />
<a href="project107.htm">107 &nbsp; Phase / Polarity Reversal Switching</a><br />
<a href="project108.htm">108 &nbsp; Switchmode PSU Protection</a><br />
<a href="project109.htm">109 &nbsp; Headphone Amp</a><br />
<br /><a href="project110.htm">110 &nbsp; IR Remote Control</a><br />
<a href="project111.htm">111 &nbsp; PIC Speaker Protection</a><br />
<a href="project112.htm">112 &nbsp; Dummy Head Microphone</a><br />
<a href="project113.htm">113 &nbsp; Hi-Fi Headphone Amp</a><br />
<a href="project114.htm">114 &nbsp; Class-D (PWM) Power Amp</a><br />
<a href="project115.htm">115 &nbsp; GainClone Amplifier (Part 1)</a><br />
<a href="project115-2.htm">115 &nbsp; GainClone Amplifier (Part 2)</a><br />
<a href="project116.htm">116 &nbsp; Class-D Subwoofer Amp</a><br />
<a href="project117.htm">117 &nbsp; 1.5kW Power Amplifier</a><br />
<a href="project118.htm">118 &nbsp; Ultra Simple PC Peripheral Switch</a><br />
<a href="project119.htm">119 &nbsp; Component Signature Analyser</a><br />
<br /><a href="project120.htm">120 &nbsp; Crowbar Speaker Protection</a><br />
<a href="project121.htm">121 &nbsp; Reading Inductance</a><br />
<a href="project122.htm">122 &nbsp; Ultra-Simple Mic Preamp</a><br />
<a href="project123.htm">123 &nbsp; 18dB/Octave Crossover</a><br />
<a href="project124.htm">124 &nbsp; Dummy Load</a><br />
<a href="project125.htm">125 &nbsp; 4-Way 24dB/Octave Crossover</a><br />
<a href="project126.htm">126 &nbsp; 10A, 12V PWM dimmer/ speed controller</a><br />
<a href="project127.htm">127 &nbsp; Two Channel TDA7293 power amplifier</a><br />
<a href="project128.htm">128 &nbsp; Analogue VU Meter Bridge</a><br />
<a href="project129.htm">129 &nbsp; Matrix Mixer</a><br />
<br /><a href="project130.htm">130 &nbsp; Inverse A-Weighting Filter</a><br />
<a href="project131.htm">131 &nbsp; Light Activated Switch</a><br />
<a href="project132.htm">132 &nbsp; Air Bearing Tonearm</a><br />
<a href="project133.htm">133 &nbsp; PA-PC Audio Interfaces</a><br />
<a href="project134.htm">134 &nbsp; 4mA Current Loop Microphone</a><br />
<a href="project135.htm">135 &nbsp; Phase Correlation Meter</a><br />
<a href="project136.htm">136 &nbsp; Real-Time Audio Analyser</a><br />
<a href="project137.htm">137 &nbsp; Bi-amped PA Amplifier</a><br />
<a href="project138.htm">138 &nbsp; Mains Over/ Under Voltage Cutout</a><br />
<a href="project139.htm">139 &nbsp; Mains Current Monitor</a><br />
<a href="project139a.htm">139A&nbsp;Simple Current Monitor</a><br />
<br /><a href="project140.htm">140 &nbsp; True RMS Adaptor</a><br />
<a href="project141.htm">141 &nbsp; VCA Based Preamplifier (THAT2180)</a><br />
<a href="project142.htm">142 &nbsp; Simple High Current Regulator</a><br />
<a href="project143.htm">143 &nbsp; Tone Burst Generator/ Gate</a><br />
<a href="project144.htm">144 &nbsp; Mains Power Sequencer</a><br />
<a href="project145.htm">145 &nbsp; Silent Guitar Effects Switching</a><br />
<a href="project146.htm">146 &nbsp; Overload/ Clipping Indicator</a><br />
<a href="project147.htm">147 &nbsp; BJT Muting Switch</a><br />
<a href="project148.htm">148 &nbsp; State Variable Crossover</a><br />
<a href="project149.htm">149 &nbsp; Musical Instrument Graphic EQ</a><br />
<br /><a href="project150.htm">150 &nbsp; Wien Bridge based equaliser</a><br />
<a href="project151.htm">151 &nbsp; High Voltage DC Supply</a><br />
<a href="project152-1.htm">152 &nbsp; Bass Guitar Amplifier - Part 1</a><br />
<a href="project152-2.htm">152 &nbsp; Bass Guitar Amplifier - Part 2</a><br />
<a href="project153.htm">153 &nbsp; Frequency 'Isolator' EQ</a><br />
<a href="project154.htm">154 &nbsp; PC Oscilloscope Interface</a><br />
<a href="project155.htm">155 &nbsp; Variable High And Low Pass Filters</a><br />
<a href="project156.htm">156 &nbsp; 12V Trigger Switches</a><br />
<a href="project157.htm">157 &nbsp; 3-Wire trailing-edge light dimmer</a><br />
<a href="project158.htm">158 &nbsp; Low-Noise Test Preamplifier</a><br />
<a href="project159.htm">159 &nbsp; 3-Wire Leading-Edge Dimmer</a><br />
<br /><a href="project160.htm">160 &nbsp; LM386, LM380 &amp; LM384 Power Amplifiers</a><br />
<a href="project161.htm">161 &nbsp; High Impedance Input Stages</a><br />
<a href="project162.htm">162 &nbsp; Voltage Controlled Oscillator</a><br />
<a href="project163.htm">163 &nbsp; Preamp Input Switching Using Relays</a><br />
<a href="project164.htm">164 &nbsp; Signal Tracer</a><br />
<a href="project165.htm">165 &nbsp; Valve Tester for Service Techs</a><br />
<a href="project166.htm">166 &nbsp; Push-on, Push-off Mains Switch</a><br />
<a href="project167.htm">167 &nbsp; MOSFET Follower &amp; Circuit Protection</a><br />
<a href="project168.htm">168 &nbsp; Low Ohms Meter</a><br />
<a href="project169.htm">169 &nbsp; Battery Powered 'Audiophile' Amplifier</a><br />
<br />
<a href="project170.htm">170 &nbsp; 6dB/ Octave Active Crossover</a><br />
<a href="project171.htm">171 &nbsp; Infrasound Translator</a><br />
<a href="project172.htm">172 &nbsp; Wattmeter for AC Power Measurements</a><br />
<a href="project173.htm">173 &nbsp; Constant Directivity Horn Equaliser</a><br />
<a href="project174.htm">174 &nbsp; Ultra-Low Distortion Oscillator</a><br />
<a href="project175.htm">175 &nbsp; Single Supply BTL Amp DC Protection</a><br />
<a href="project176.htm">176 &nbsp; Fully Differential Amplifier</a><br />
<a href="project177.htm">177 &nbsp; Constant Current Transistor Tester</a><br />
<a href="project178.htm">178 &nbsp; Low Voltage Power Amplifier</a><br />
<a href="project179.htm">179 &nbsp; Filament Lamp Stabilised Wien Bridge Oscillator</a><br />
<br />
<a href="project180.htm">180 &nbsp; Amplifier 'Power Meter'</a><br />
<a href="project181.htm">181 &nbsp; Audio Accelerometer</a><br />
<a href="project182.htm">182 &nbsp; Maximum Length Sequence (MLS) Noise Generator</a><br />
<a href="project183.htm">183 &nbsp; Signal Detecting Audio Ducking Unit</a><br />
<a href="project184.htm">184 &nbsp; Li-Ion Battery Cutoff For Electronics Projects</a><br />
<a href="project185.htm">185 &nbsp; Speaker, Microphone &amp; Circuit Polarity Tester</a><br />
<a href="project186.htm">186 &nbsp; Workbench Test Amplifier</a><br />
<a href="project187.htm">187 &nbsp; Moving Coil Head Amplifier</a><br />
<a href="project188.htm">188 &nbsp; Surround Sound Decoder (Mk II)</a><br />
<a href="project189.htm">189 &nbsp; Audio Wattmeter (Measures True Power)</a><br />
<br />
<a href="project190.htm">190 &nbsp; Microphone (including phantom powered) Muting Circuit</a><br />
<a href="project191.htm">191 &nbsp; Peak Voltage &amp; Current Detector For Loudspeakers</a><br />
<a href="project192.htm">192 &nbsp; 12V to &plusmn;12V Switchmode Supply</a><br />
<a href="project193.htm">193 &nbsp; 12V to P48 Phantom Power Supply</a><br />
194 &nbsp; Withdrawn<br />
<a href="project195.htm">195 &nbsp; Guitar 'Talk Box'</a><br />
<a href="project196.htm">196 &nbsp; 12V Float-Charge Battery Supply</a><br />
<a href="project197.htm">197 &nbsp; Low Frequency Boost And High Pass Filter For Speaker EQ</a><br />
<a href="project198.htm">198 &nbsp; MOSFET Relay</a><br />
<a href="project199.htm">199 &nbsp; ABC New Years Eve Concert Equaliser</a><br />
<br />
<a href="project200.htm">200 &nbsp; DIY LDR Optocoupler</a><br />
<a href="project201.htm">201 &nbsp; Multi-Channel Trailing-Edge Dimmer</a><br />
<a href="project202.htm">202 &nbsp; Piezo Preamplifiers</a><br />
<a href="project203.htm">203 &nbsp; Guitar/ Studio Spring Reverb Unit</a><br />
<a href="project204.htm">204 &nbsp; Frequency Shifter For Acoustic Feedback Reduction</a><br />
<a href="project205.htm">205 &nbsp; 4-Channel Mixer For Microphones Or Instruments</a><br />
<a href="project206.htm">206 &nbsp; Guitar Vibrato/ Tremolo Unit</a><br />
<a href="project207.htm">207 &nbsp; High Current AC Source</a><br />
<a href="project208.htm">208 &nbsp; Amplifier Powered DC Protection Circuit</a><br />
<a href="project209.htm">209 &nbsp; Resistor And Capacitor Decade Boxes</a><br />
<br />
<a href="project210.htm">210 &nbsp; Electronic Fuse Circuits For DC and AC</a><br />
<a href="project211.htm">211 &nbsp; Reverb Drive And Recovery Amplifier</a><br />
<a href="project212.htm">212 &nbsp; High Impedance DC Voltmeter</a><br />
<a href="project213.htm">213 &nbsp; DIY voltage controlled amplifier (VCA)</a><br />
<a href="project214.htm">214 &nbsp; 'Zero Capacitance' Guitar Lead</a><br />
<a href="project215-p27-revisit.htm">215 &nbsp; 'P27-Revisited' 40W Guitar Amp</a><br />
<a href="project216.htm">216 &nbsp; Speaker Emulator Dummy Load</a><br />
<a href="project217.htm">217 &nbsp; Low Power 'Practice' Amplifier</a><br />
<a href="project218.htm">218 &nbsp; High Q Gyrator Filter</a><br />
<a href="project219.htm">219 &nbsp; Valve Guitar Amp Speaker Switch</a><br />
<br />
<a href="project220.htm">220 &nbsp; Switchmode Buck Converter</a><br />
<a href="project221.htm">221 &nbsp; Tweeter Amp Voltage Regulator</a><br />
<a href="project222.htm">222 &nbsp; Transformerless Soft Start Power Switch</a><br />
<a href="project223.htm">223 &nbsp; Dual Bench Power Supply</a><br />
<a href="project224.htm">224 &nbsp; External In-Line Inrush Limiter</a><br />
<a href="https://sound-au.com/project225.htm">225 &nbsp; Inrush Current Test Unit</a><br />
<a href="project226.htm">226 &nbsp; Versatile Tone Controls</a><br />
<a href="project227.htm">227 &nbsp; Hybrid Relay For Speaker Protection</a><br />
<a href="project228.htm">228 &nbsp; Negative Impedance Test Amplifier</a><br />
<a href="p228-annex.htm">228A Negative Z Test Amp Annex</a><br />
<a href="project229.htm">229 &nbsp; Enhanced Reverb Mute System</a><br />
<br />
<a href="project230.htm">230 &nbsp; Workbench Signal Routing Panel</a><br />
<a href="project231.htm">231 &nbsp; Fast Discrete Opamp</a><br />
<a href="project232.htm">232 &nbsp; Distortion Measurement System</a><br />
<a href="project233.htm">233 &nbsp; Isolated Power DC-DC Supplies</a><br />
<a href="project234.htm">234 &nbsp; Resistor Substitution Box</a><br />
<a href="project235.htm">235 &nbsp; Current Feedback Opamp (DIY)</a><br />
<a href="project236.htm">236 &nbsp; AC Millivoltmeter</a><br />
<a href="project237.htm">237 &nbsp; JFET Test System</a><br />
<a href="project238.htm">238 &nbsp; High Voltage, Low Current DC Source</a><br />
<a href="project239.htm">239 &nbsp; Signal Detecting Power-On (Mk II)</a><br />
<br />
<a href="project240.htm">240 &nbsp; 10 Watt Audio Amp/ DC Supply</a><br />
<a href="project241.htm">241 &nbsp; Z-Weighting Filter</a><br />
<a href="project242.htm">242 &nbsp; Cosine Burst Generator (Mk II)</a><br />
<a href="project243.htm">243 &nbsp; 'Retro' Hi-Fi System</a><br />
<a href="project244.htm">244 &nbsp; 3-LED Level Indicator</a><br />
<a href="project244.htm">245 &nbsp; TPSI3052-Q1 MOSFET Relay</a><br />
<a href="project244.htm">246 &nbsp; Clipping Indicator</a><br />
<a href="project244.htm">247 &nbsp; Tape Head Preamp</a><br />
<a href="project244.htm">248 &nbsp; Low-Voltage Charge Pumps</a><br />
<a href="project244.htm">249 &nbsp; Guitar Booster Circuits</a><br />
<a href="project244.htm">250 &nbsp; Inductor Saturation Tester</a><br />
<a href="project244.htm">251 &nbsp; Protected DC Load</a><br />
<a href="project244.htm">252 &nbsp; 6-Band Guitar EQ</a><br />
<a href="project244.htm">253 &nbsp; 18dB/Octave State Variable Xover</a><br />
<a href="project244.htm">254 &nbsp; 24/18dB Octave Asymmetrical Xover</a><br />
<br />
<a href="abx-tester.htm">ABX &nbsp; ABX Comparator</a><br />
<a href="absw.htm">X &nbsp; &nbsp; &nbsp;A-B Switch Box</a><br />
<br />
<a href="projectsuggest.htm">Project Suggestions</a><br />
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ESP reserves the right to make changes, updates, modifications or additions to any document, drawing or image at any time, and copyright shall be automatically extended to the changed, updated, modified or added material.&nbsp; Errors and omissions may occur within articles or other material, and no claim may be made against ESP for any damages howsoever caused.&nbsp; Use of any material from this site (or any other site maintained by Rod Elliott / Elliott Sound Products) is at the reader's risk entirely, and the reader shall establish whether any material presented is suitable (or otherwise) for the intended use.<br /><br />
Note that some links on this page may refer to documents in preparation, and these may or may not be available at any given time.
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