Tech Corner > Tubes

GM-70 tubes

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Tuyen:
Vintage Russian GM-70 tubes.   What amps have you heard them in and how would you describe their sound?

Cheers!

omodo:
they make great heaters, not so good in QLD summers!  :P

Tuyen:
musical heaters..  I like it!

Was given a pair of NOS graphite type tubes.  Wondered if worthwhile looking for suitable iron (most expensive/important part) with the aim to build something for them.     I have to admit I do like the big and clear '211/845' sound.  But then again, I have only heard maybe 5 different amps that use the those tubes and most of them were Chinese :D

omodo:
I wouldn't say mine are overly clear or bright if that's what you mean. I'd say on the warm side of neutral but as always it would depend on the circuit, implementation and voicing. They do sound big, and powerful..

stevenvalve:
Experience has shown me that in the single ended class A triode world, a lower powered amplifier generally means better sound than a higher powered amplifier. Will a 50 watt GM70 amplifier outperform a 2 watt 45 ?..... Is that true, what do you guys think, does lower power mean better sound.

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