Bias adjustment


I need to set the bias on my vacuum tube amplifier.  Does anyone know where I can BUY an amp meter that reads milliamps?  Most I have seen are for large AMP applications.
128x128richfrank
Hello oldhvymec. Yours has been probably the best and clearest explanation of all the "advices" I've had. I REALLY thank you for taking the time to explain the bias process.

I've had a similar issue with Cary when my old SLA-70 Signature ran into trouble some years back. They would not supply me with a schematic at all saying it was "obsolete" and they do not keep old schematics. None of this should have happened if they had a bit of honesty and transparency. I'm sure that Dennis Had (?) in his days never had issues like that. It's a shame the company has changed owners. Such is life.
Thanks again for your help. Sincerely, Richard
I just had a bit of a tiff also with Cary. I ask for a schematic, hand written, or partial for the hexfred upgrade. Didn’t ask where it goes, or to hold my hand while someone else does it. I asked TWICE. Just ignored the request.

I bought a case of Coca-Cola and called up there head office and requested the formulae and was also ignored.  
+1 @testpilot   at what point does a consumer have a legal or ethical right to a firm's intellectual property just because they purchased a product?
How on earth are you guys measuring bias while running a musical signal? The bias moves up and down continuously while the music playing. It must be idle to measure it accurately.     
@oldhvymec- If you’re interested in doing a HEXFRED update, on a Cary product, PM me.     I can talk you through it.     Did my SLM-100s, without their help.      Virtually, every other component I own, as well.    I also have pics, if we can figure out a way to communicate them.