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The Spontaflex Reflex Web Page
"An idea of the ingenious reflex operation employed is given by the fact that the headphone output is taken from the same emitter that the aerial is applied to!" Some very cool 1960s transistor radio designs.
to electronics radio retrotech ... on 21 July 2005
Vintage Radio Repair and Restoration
to electronics radio retrotech ... on 21 July 2005
12V Space Charge Tubes: A Junkbox Resource Guide
Low-voltage valve audio designs.
to audio electronics retrotech ... on 09 July 2005
Hifi valve designs, including the very simple "Darling" amplifier.
to audio electronics retrotech ... on 09 July 2005
Pete Millett's DIY Audio pages
Amplifier designs -- in particular, the HA-4 is a very neat headphone amp. Valve data sheet books as PDFs too.
to electronics retrotech ... on 09 July 2005
I came here looking for the All-American 5 information, but there are lots of other valve-related articles here too.
to electronics retrotech ... on 06 July 2005
Sort of like a Mellotron, but on a considerably smaller budget (transparent discs rather than tapes).
to electronics music retrotech ... on 16 May 2005
Lots of stuff about turntables. Some of the home-made turntables are particularly neat.
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tasty by Adam Sampson.