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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Is it still in production? (nt) posted by Triode_Kingdom on April 5, 2007 at 06:07:02:
They were only made at Ulyanovsk factory that has closed, AFAIK.However, a lot of these tubes have been produced and stocked, so NOS supply is pretty good. The main use for GM70 was for wire translation service. Every house, apartment, and workplace in the USSR had a 30 V audio outlet feeding a speaker with a matching transformer. The network provided broadcast from 6 am to 1 am, and was powered by local audio amplifiers using GM70 and GM100 tubes. Both tube types were designed for years of continuous service and had very conservative ratings.
So, GM70 was not primarily designed for the military. However, because wire broadcasting was a very important element of Soviet propaganda, the quality and dependability of this service was an important concern for the government, which reflected on the quality of these tubes.
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- Unfortunately, not. - sser2 11:58:32 04/06/07 (0)
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