SET Asylum

RE: trying not to destroy amp

76.90.100.230

Tre'

In Reply to: RE: trying not to destroy amp posted by sam.edelmann on December 11, 2022 at 15:19:58

What is the value of the output tube cathode resistors that are in there now?

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

Follow Ups:

RE: trying not to destroy amp - sam.edelmann 16:40:36 12/11/22 (1)
The entire amp
- JEL Simple 45/2A3 - je2a3 17:16:46 12/11/22 (0)
  Hi Sam,
  I didn't build that amp but I wrote the article for the DIY section of Angela Instruments in the 90s. It's really a 45 amp wherein you can drop a 2A3 because the filament supply has enough current to accommodate it. The switch was an additional feature made by the builder. So that is where there can be a potential problem.
  More info about the project can be found in my blog archive linked below.
  Send me a PM here or in my blog if you need more help.
  JE
  - Simple 45/2A3 (Open in New Window)
  Edits: 12/11/22
RE: trying not to destroy amp - sam.edelmann 16:38:24 12/11/22 (5)
I am not sure. I have been out of the hobby for quite a while. Just getting back into it.
This was built from the JE Labs Simple 45/2A3 circa 1995.
I can take a picture of the underside of the amp if that will help.
- RE: trying not to destroy amp - Tre' 17:12:41 12/11/22 (4)
  If these resistors are 1500 ohm resistors then you want to use 45 tubes. If these resistors are 750 ohms then you want to use 2a3 tubes.
  
  Tre'
  Have Fun and Enjoy the Music
  "Still Working the Problem"
  - RE: trying not to destroy amp - sam.edelmann 17:15:39 12/11/22 (3)
    Not knowing which they are, would the 45's put less stress on the transformers than the 2A3. Looking to protect the amp.
    Thanks.
    - Yes. nt - Tre' 17:30:33 12/11/22 (2)
      .
      Have Fun and Enjoy the Music
      "Still Working the Problem"
      - RE: Yes. nt - David Lawrence 08:02:19 12/12/22 (1)
        
        In Reply to: RE: Yes. nt posted by Tre' on December 11, 2022 at 17:30:33
        
        Hi,
        
        For the future, would a JJ2A3 work well in this amp?
        
        Thanks,
        David
        
        RE: Yes. nt - Tre' 10:19:40 12/12/22 (0)
        
        In Reply to: RE: Yes. nt posted by David Lawrence on December 12, 2022 at 08:02:19
        
        What value resistors are in there now? I marked the ones you want to look at in the picture with a red line and a red arrow.
        
        Tre'
        Have Fun and Enjoy the Music
        "Still Working the Problem"

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