| No. |
Preamps & Accessories |
Description |
Flags |
| 02 | Simple 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Note: This project is now superceded by Project 88 (but this is still worth reading). |
|
| 06 | Phono (RIAA) Preamp |
Very high quality moving magnet phono preamp - few circuits will better this one. Performance is excellent (Updated) | 15Aug
 |
| 25 | Phono Preamps For All |
Circuits for moving coil and moving magnet pickups, a range of different equalisation circuits and a complete explanation of RIAA equalisation |
|
| 32 | Car 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 |
|
| 37 | Death 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-A | Death of Zen Preamp (Rev A) |
Updated version of the "minimalist" preamp, now uses dual supply rails (use P05 power supply). | 25Sep
|
| 51 | Balanced Line Drivers |
Use these to eliminate hum for long signal leads, or when you cannot eliminate that &*&$$# hum loop from your system |
|
| 80 | Reverse 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 |
| 87 | Balanced 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 |
| 88 | High 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
|
| 91 | 78 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
|
| 97 | Hi-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
|
| 99 | Subsonic / 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
|
| 104 | Preamp/ 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 |
| 107 | Phase / 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 |
| 110 | IR 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
|
