Tubes Asylum

I ordered an adapter

73.143.183.29

JoshT

A

In Reply to: RE: I continue to use the adapter posted by 1973shovel on March 16, 2023 at 08:21:37

I bought one based on a link from Roy and received an email from the seller - screen shot below.

Is this just a generic warning about putting a 6 volt tube in a 12 volt tube socket? I assume it would be a concern if I were replacing all three tubes but isn't where I'm just replacing the center tube?

Thanks for your input on this.

___
"If you are the owner of a new stereophonic system, this record will play with even more brilliant true-to-life fidelity. In short, you can purchase this record with no fear of its becoming obsolete in the future."

Follow Ups:

RE: I ordered an adapter - 1973shovel 07:33:19 03/17/23 (2)
All tube filaments in a Dynaco ST-70 (including the VTA version) use 6.3 VAC, other than the 5AR4 rectifier. So the 6.3 V adapter is the one you want, even if you were adapting all three driver tubes.
- Continuity meter - 1973shovel 08:07:54 03/17/23 (1)
  I'm going to assume that you have a continuity function on the meter you use to check tube bias. If so, above is a crosscheck I came up with from the data sheets of the two tubes, to be certain that the adapter is wired correctly before you use it in your amp. I wasn't willing to leave the adapter to "It's probably OK", and it only took a minute to test.
  
  The column on the left are the 12AU7 pins, and on the right are the corresponding 6SN7 sockets.
  
  Good luck with it, and I strongly suspect you'll soon be a member of the 90% Club (who prefer the 6SN7 over the 12AU7 in the VTA). Please keep us posted.
  - Thanks again! - JoshT 10:57:10 03/17/23 (0)
    Now to order a tube, most likely from Jim, Brent or the Tube Depot. Or an Inmate, lol. I've had good luck in the past with all four sources. :-)
    ___
    "If you are the owner of a new stereophonic system, this record will play with even more brilliant true-to-life fidelity. In short, you can purchase this record with no fear of its becoming obsolete in the future."

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