• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

6V6 line preamp

diyAudio Chief Moderator
Joined 2002
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Punksters were proclaiming the merits of DIY ethos BTW. Nice with the amp, so it had too much NFB for its stomach. Now you can tweak that 0.001 to some nice 10K square. Is it wiggly now for such a square? That congestion in HF could be related if so.
 
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Joined 2011
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Yes Mr Biafra is a real gentleman and had/have real well grounded ideas behind his whole appearance. I will let the amp play and show if its stable a while. I putted 2k4s instead of 1 k. The sound went firmer, more controlled, less wet and fluffy. I'm not yet sure if that is pro or con to my taste;)

After that some measures
 
Around 22mA depending on tubes brand and vintage.

Cool thanks Salas, the current is what I was needling to know. I'm hoping to build a pre pretty soon. But I'm going to go with the old school approach with lclc supply filter.

has anyone put a tvc on the output of this? I've got one with a inductance of 20H. I've read the inductance doesn't matter since its a reflected load. But I though I'd ask.

Thanks,
Nick