Carlbuilt 400HD vs C400 vs CM400

[Lost Ram]

Mike, very few builders in the US use temp tracking electronic regulated bias, off hand I can think of one person that does this on 11 meter amps that does it well, and it's not cheap.
It's just how it is unfortunately.

73
Jeff

I like to use the TIP31 setup.

 

[SuperLid]

That bias is just resistor providing bias voltage or temperature compensated bias circuit as it should be done?
Mike

His bias circuit is crap. Schottky clamping diode/resistors

 

[9C1Driver]

That bias is just resistor providing bias voltage or temperature compensated bias circuit as it should be done?
Mike

The only builder I have ever saw do this was Peakaboo in the Joker amplifiers. He came up with and designed his own regulated AB bias scheme. He would even grind off component part numbers and values so no one would try to copy it. Best amp I ever owned.

 

[Lost Ram]

The only builder I have ever saw do this was Peakaboo in the Joker amplifiers. He came up with and designed his own regulated AB bias scheme. He would even grind off component part numbers and values so no one would try to copy it. Best amp I ever owned.

He is selling those boards now. I bought four of them due to no time to make the boards from scratch myself. Each board serves 2 transistors. He uses the TIP31 setup. I dont know of any fulltime builders using that bias setup yet, the ones that do bias is just the diode/cap/resistor deal as far as I know. I guess thats better then no bias. I think Shockwave turned me to Him if I am not mistaken. Rob S also built like that too.