Tube Amps / Music Electronics
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|5/11/2004 5:17 AM|
|Constantin Necrasov||Question on long-tail phase inverter|
This particular one is from a Fender Tremolux.
There are four resistors there in the PI, between the cathodes and grids. Two 1 Meg, one 470 ohm and one 6.8K.
Some other phase inverters
list a 22k resistor instead of 6.8k.
A 10k resistor is also observed in that position on some Bassmans.
My question is: What is the cause and the purpose of such variations in the value of that resistor? What does that resistor affect?
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|5/11/2004 6:48 AM|
Randall Aiken has your answer..
Go to advanced, designing Long Tailed Pairs..
|5/11/2004 2:20 PM|
Thank you very much!
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