Tube DIY Asylum

You were right

172.11.32.65

Chip647

A

In Reply to: RE: Help with 6SL7 tube curves posted by Triode_Kingdom on April 16, 2024 at 13:51:50

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

Follow Ups:

RE: You were right - Tre' 17:43:15 04/17/24 (2)
What is/will be the value of the grid resistor of the following stage?

I was just interested in plotting your load line.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
- 220,000 (nt) - Chip647 06:11:32 04/18/24 (1)
  - RE: 220,000 (nt) - Tre' 07:15:21 04/18/24 (0)
    .
    Have Fun and Enjoy the Music
    "Still Working the Problem"
Glad it's fixed! - Triode_Kingdom 06:04:48 04/17/24 (0)
These types of problems drive me nuts sometimes. It's just so easy to overlook the obvious, especially when working with all these vintage parts. Glad to hear it was easy to resolve!

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