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Tube bias theory
Cubdriver:
To the best of my knowledge, Dynaco style amps are not known to be particularly hard on output tubes, so why not just bias them to what the amp manufacturer suggests? I have a VTA ST-70 clone, and while the driver is different (it biases the tubes individually rather than in pairs), I've run it for many hours using the bias setting from the manual and the outputs are fine.
-Pat
Johnny10:
To know more about tube Biasing...
There are three YouTube posters that have great descriptions of this.
El Paso TubeAmps
Uncle Doug
Blue Glow Electronics
I don't think you can go wrong with any of the three.
Tons of experience with the Dynamo Amps and Biasing Tube Amplifiers.
Here's a sample:
jeffjmr:
Cubdriver, why not follow the manufacturer’s recommendation was exactly the meaning behind my question. What happens if I don’t?
And It seems there is good reason to go with what is recommended. Given that the numbers they suggest are probably an average, I’d feel better if I had a better understanding of the real parameter we are trying to manage, which I believe is the current flow, which is what the bias is intended to control.
There are still some gaps in my knowledge and these posts have helped fill some of them. Going to read up some more to try to learn what I am looking at on tube data sheets.
Thanks,
Jeff
basinstreetdesign:
--- Quote from: Johnny10 on February 15, 2021, 07:01:25 pm --- :popcorn:
--- End quote ---
I agree. :popcorn:
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