Home Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

Unfortunately, not.

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.

This post is made possible by the generous support of people like you and our sponsors:
  Signature Sound   [ Signature Sound Lounge ]

Follow Ups Full Thread
Follow Ups
  • Unfortunately, not. - sser2 11:58:32 04/06/07 (0)

You can not post to an archived thread.