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Cold War civil defence radio and hardline link technology.
Physical Fabrication of Transistors
Notably, the history of transistor (and early IC) construction.
to chip electronics history ic retrotech semiconductor transistor ... on 22 September 2009
This includes a picture of an early DTL IC from the same series I've got, and is generally a good overview of early chips.
to chip electronics history ic retrotech semiconductor ... on 21 September 2009
Philips Mobile Radio Collection
With lots of technical details, mostly in Dutch.
Southwest Museum Of Engineering, Communications and Computation
Somewhat disorganised, but lots of radio, telecoms, early computing and video stuff.
to history radio retrocomputing retrotech telecom video ... on 06 September 2009
Some very pretty Tek oscilloscopes.
to electronics retrotech scope tektronix ... on 26 August 2009
Audio, Verstärker, Meßgeräte und analoge Elektronik
Various ancient test equipment, mostly in German.
to amplifier electronics retrotech scope ... on 26 August 2009
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tasty by Adam Sampson.