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RE: Question about tube amplifiers

Posted by 6bq5 (A) on July 17, 2023 at 11:09:02

In Reply to: Question about tube amplifiers posted by jedrider on July 16, 2023 at 07:34:41:

I would echo what has been said - the delta between an EL-34 and a KT150 is Significant-
Filament amperage: KT150 is noted at 2.0amps maximum and 1.75amps minimum. An EL34 is 1.5A - one will be underpowered, or have a shortened life...

Typically an EL-34 is run w/ ~400-450 volts at ~120mA on the anode/plate - the KT-150 is more like 800+V at 150-180mA

6550/KT-88 into the KT 120/150... are more compatible in a given amp
THe EL-34 was designed as a lower output tube - for a slightly different application...

I will also readily admit that the KT 90, 120, 150 are not my cup of tea.
esp the KT-90....


Happy Listening

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