Bias circuit for fixed bias

[Jose R]

I use the PEC (which I believe were mentioned earlier).

An externally hosted image should be here but it was not working when we last tested it.

And FWIW, I have attached the fixed bias circuit I use. Stable and no issues. (Based on suggestions from Jack Elliano at Electra-Print.)

 

[thehoj]

I use the PEC (which I believe were mentioned earlier).

An externally hosted image should be here but it was not working when we last tested it.

And FWIW, I have attached the fixed bias circuit I use. Stable and no issues. (Based on suggestions from Jack Elliano at Electra-Print.)

Seems like a lot of people take the bias voltage from the wiper.

 

[kevinkr]

I do in my personal designs, however the advice to add R2 was a good one and I am doing that in my few designs intended for commercial use.

As I mentioned earlier the RV4LAYSA pots are long term reliable, I use PEC or Ohmite bard. (Digikey stocks these as you already know)

Since you don't need to supply any grid current at all 50K should be fine.

 

[Chris Hornbeck]

Who one Earth told you that? A few milliamps of DC through a carbon pot that is hardly ever used is nothing. Less than nothing. Yeesh, only on an audiophool forum could people make such a meal out of a bias pot.

You're both rude and wrong. They seem to coexist often.

Chris

 

[Wavebourn]

I use Soviet military SP3-9 pots