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 Elliott Sound Products Project Information 
 
No. Preamps & Accessories Description Flags
02Simple High Quality
Hi-Fi Preamp
As it says - simple, high quality preamp.  Has all the facilities normally expected, and is easily modified to your own requirements.
Note: This project is now superceded by Project 88 (but this is still worth reading).

06Phono (RIAA) Preamp Very high quality moving magnet phono preamp - few circuits will better this one.  Performance is excellent (Updated)15Aug
pcb
25Phono Preamps For All Circuits for moving coil and moving magnet pickups, a range of different equalisation circuits and a complete explanation of RIAA equalisation
32Car Audio Preamp +
Artificial Earth
Especially for car audio installations. Includes some basic ideas on how to use the artificial earth on other conventional) audio circuits
37Death of Zen Preamp "Minimalist" preamp, with excellent specifications, designed to suit the DoZ (or any other) power amplifier. (see P37-A for latest version)02Sep
37-ADeath of Zen Preamp (Rev A) Updated version of the "minimalist" preamp, now uses dual supply rails (use P05 power supply).25Sep
pcb
51Balanced Line Drivers Use these to eliminate hum for long signal leads, or when you cannot eliminate that &*&$$# hum loop from your system
80Reverse RIAA Equaliser Do you have an unused phono input?  With this little contributed project, you can use it for any other signal source, or you can test phono preamps for correct equalisation.22Jun
87Balanced Line Drivers II Some more examples of balanced line transmitters and receivers, with higher performance than those in Project 51.  Don't forget to check out the section "Hey! That's Cheating" - you may be surprised at the findings on this method.29Mar
88High Quality Audio Preamp - Mk II Project 02 is pretty much past its use-by date now, so I figured it was time for an update. This new version has PCBs available, and its performance is as good or better than the best commercial offerings around. Very flexible design, so the board can be used anywhere a preamplifier is needed. 01Apr
pcb
9178 RPM and RIAA Phono Preamp There is a distinct lack of professional DIY phono preamps that are capable of working with the vast number of different standards that were used for 78 rpm recordings. This project is based on the P06 preamp (and can use the same PCB), and will give results that are second to none 11May
pcb
97Hi-Fi Preamp Unlike most of my projects, this was designed from the PCB backwards. It is intended for use with PCB mounted pots, and provides Bass, Treble, Balance and Volume controls. A completely new technique for de-sensitising the tone controls gives you full range or very restricted control for minor corrections. 28Dec
pcb
99Subsonic / Rumble Filter A conventional but very effective filter to remove extraneous subsonic noise from vinyl disks, either for listening or transcription to CD. A very steep 36dB/octave filter removes frequencies below 17Hz.04Mar
pcb
104Preamp/ Crossover Muting Circuit A useful addition to any crossover or preamp project that insists on making rude noises - typically just after power is turned off. May be expanded to as many channels as needed, and uses readily available parts.09May
107Phase / Polarity Switch Simple switching circuits to allow normal or inverted polarity of the signal. May be used to experiment with the concept of 'absolute phase', or anywhere else that a switched polarity reversal circuit may be useful.19Sep
110IR Remote Control Something that readers have been asking for has finally arrived - a complete (simple but functional) infrared remote control for preamps. It provides a driver for a motorised pot for volume and a relay for mute, and short-form kits will be available soon.Nov05
pcb

 

Copyright Notice. All projects described herein are the intellectual property of Rod Elliott unless otherwise stated, and are Copyright © 1999 - 2007. See individual project for full copyright details
Last Update - 25 Sep 2007