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paulsherwin · 26th Apr 2017, 1:50 pm

That circuit does suggest PNP Ge transistors throughout. The USSR stuck with Ge for longer than the rest of the world, particularly in consumer electronics. Presumably the military and industry had first pick of Si devices as they became available.

26th Apr 2017, 1:50 pm	#6
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,970	Re: Problematic Spidola 231 That circuit does suggest PNP Ge transistors throughout. The USSR stuck with Ge for longer than the rest of the world, particularly in consumer electronics. Presumably the military and industry had first pick of Si devices as they became available.