5Y3GT
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Partnumber: NN503
5Y3GT
Sov/Russia used in lower power amps
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Eric Lacroix 

(3/5)
Like the modern Sovtek 5Y3GT, the voltage drop with this russian 5Y3GT is not as important as expected.
For example, in my '65 vibro champ, when with a original or NOS 5Y3GT (Sylvana) I get 290v (at the 1st cap), I get 420v with this russian 5Y3GT.
Same with a 5C3 champ clone, I get 395v instead of 365v at the first cap.
There is nothing wrong with this tube. It works fine, but don't expect to get vintage specs with it.
For example, in my '65 vibro champ, when with a original or NOS 5Y3GT (Sylvana) I get 290v (at the 1st cap), I get 420v with this russian 5Y3GT.
Same with a 5C3 champ clone, I get 395v instead of 365v at the first cap.
There is nothing wrong with this tube. It works fine, but don't expect to get vintage specs with it.