Armstrong 500 Amp/receiver

Armstrong 500 Amp/receiver 19 Armstrong 500 Amp/receiver 20 Armstrong 500 Amp/receiver 21 Armstrong 500 Amp/receiver 22 Armstrong 500 Amp/receiver 23 Armstrong 500 Amp/receiver 24 Armstrong 500 Amp/receiver 25 Armstrong 500 Amp/receiver 26 Armstrong 500 Amp/receiver 27

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Cathovisor
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3 years ago

I currently have two of these on the bench: a 526 receiver and a 521 amplifier. Both need extensive modification to use silicon output devices as the advanced (at the time) germanium output transistors are a well-known weak point. Very unusual in using a stabilised power supply for the whole amplifier – not just the pre-amplifier.

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