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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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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: why use a gm70 when 845 is current production (chinese though) and... posted by jarthel on April 3, 2007 at 18:29:34:
The GM70 was used in mobile (field) RF equipment by the Soviet
Red Army. You can bet your bottom baloney that the tubes were manufactured with far more care than anything that comes out of Chinese factories... For military parts it means that the materials that go into the devices have to qualify, then the manufacturing and inspection process is monitored. Last but not least, there is reliability testing. There's no way Chinese factories with the goal
of producing consumer parts needs to make things at this level of repeatability, nor could they afford to match the capabilities of the Russian plants.USSR stuff is the ultimate boondoogle for us tube heads and ham
people... This isnt the first time its happened either.. As it turns
out, after the Cold War, many aircraft factories in the USSR began turning out their aircraft-grade aluminum and titanium tubing to feed the mountain bike industry.That said, I'd expect the GM70 to have longer filament life, much
greater resistance to shock and shear than 845s.-- Jim
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Quality parts courtesy of the Taxpayers of the USSR - Jim Doyle 20:44:40 04/04/07 (3)
- Is it still in production? (nt) - Triode_Kingdom 06:07:02 04/05/07 (2)
- Unfortunately, not. - sser2 11:58:32 04/06/07 (0)
- And why does it matter unless you are a manufacturer - nc 19:17:19 04/05/07 (0)
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