Tube DIY Asylum

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Original Message

You were right

Posted by Chip647 on April 16, 2024 at 17:21:15:
I have a lot of old tubes that bought a long time ago. The one I grabbed as a 6SL7 was really a 6SN7 that had been put into the wrong box. The identifiers had been long wiped away, but looking at it, it is very obviously a 6SN7.

Now with an actual round plate NOS RCA:
B+ 370
Plate Resistor 220k
Plate Voltage 190
Cathode resistor 2.3K
Cathode Voltage 2v
Current 0.9mA (0.165 plate watts)

Which falls in a very nice spot on the curves.

Thanks