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A nice collection of modifications for the L-100 series. I'm quite tempted to do the in-phase chorus mod on mine...
to audio chorus electronics hammond l100 mod organ ... on 27 August 2016
German Hammond technician. This has some interesting mods for the T-200 series, which are effectively transistorised versions of the L-100 -- e.g. adding a valve distortion unit based on Russian miniature valves. I also like his tonewheel level calibration software...
to audio distortion electronics hammond organ valve ... on 27 August 2016
PY1AHD ALEX - Alexandre Grimberg - py1ahd
A magnetic loop antenna with a highly entertaining tuning capacitor construction.
to antenna capacitor electronics loop radio ... on 21 June 2016
requesting Sinclair X-20, X-10 information - diyAudio
Schematics for Sinclair's PWM amplifiers.
to amplifier audio electronics sinclair ... on 21 June 2016
The Z80 Membership Card Computer
Z80 version of the CDP1802 Membership Card. This is not a million miles away from the Pocket80 machine I built -- except they use separate EPROM and RAM, whereas mine just had battery-backed-up RAM.
to electronics retrocomputing z80 ... on 21 June 2016
Home Z80-based console. The video system on this is very similar to the one I built in the 90s for my Z80 machine -- including the lack of sync with the processor. (But even IBM's CGA had that problem!)
to console electronics games homebrew retrocomputing video z80 ... on 01 May 2016
All SWTPC (of later home computer fame)'s Popular Electronics projects. Includes several generations of a neat transistor amplifier project, and other standard 70s audio fare. The guitar amp stuck out as one worth cribbing ideas from (e.g. the tone controls which I've never got right on my practice amp...).
to amplifier audio electronics hifi retrotech swtpc ... on 01 May 2016
60s/70s audio projects -- mostly amplifiers and mods to them -- from Hi Fi News and similar magazines.
to amplifier audio electronics etext hifi retrotech ... on 18 April 2016
Spectrally Challenged - distortion spectra of audio power chips
"This very interesting article by Ben Duncan appeared in the October 1993 issue of Electronics World + Wireless World magazine in the UK. In it, the author tests ten popular power amplifier chips and explains, amongst other things, how the distortion spectra are important in terms of sound quality." The LM386 is -- as expected -- terrible.
to amplifier audio distortion electronics harmonics ... on 31 March 2016
A large collection of mods for the Archimedes, and a canned classic RiscOS distribution (including !Hamsters). I particularly like the mod that involves installing an Atari ST floppy controller in an A3000 to get HD floppy support!
to acorn archimedes arm bbc electronics floppy retrocomputing riscos ... on 25 March 2016
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tasty by Adam Sampson.