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Eico 377 audio generator (New video)

1,178 views · Published 1 August 2016 · 9:06 · Indexed 4 November 2026

Channel: douro20 · 2016 · Science & Technology

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I apologise for sounding nasal in this video as my allergies are flaring up.  Anyway this is my second video about this Eico model 377 audio generator, in which I clear up some misconceptions of my own about how this instrument works.  

A few things which I unintentionally left out of the video:
The Philips/Westinghouse 6SK7GT (a very nice tube BTW) was placed in there as part of an experiment to see how well it would work with a remote-cutoff pentode rather than the 6SJ7 which has a sharp cutoff, and it seems to have no problem working in this circuit.  I'll leave it in since this unit has very high hours.

I know what some of you will say about me using a 6BX7 in place of the 6SN7 in the chopper circuit, but this tube works very well in its place and it is more robust (and considerably cheaper) than the high-hour 6SN7 which came out of there.

I have checked all of the electrolytic capacitors in this instrument and they are all good with very low ESR.  I will replace the paper capacitors later.

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