Home OTL Asylum

OTL, Output Transformerless Amplifier User Group.

Re: DIY

When I got the resistor upgrade from Atma-Sphere for the M60 kits I had built, the resistors were for each grid and for each plate of the output tubes. I was told one advantage was being able to measure across the plate resistors so you could match tubes.

Recent posts here from Ralph suggest they no longer use resistors at the plates, but at the cathode instead. I would think you could also use the cathode resistor to measure tube performance.

As for finding bad tubes, wouldn't it be easier just to pull out the tubes one by one and look at them? That's how I found my latest one -after a heart-stopping zap in the speaker gave me a hint. It took only a few minutes to check the tubes and examining them is a nice zen-like exercise that at the least renews one's respect for tube design and manufacture.


This post is made possible by the generous support of people like you and our sponsors:
  Schiit Audio  


Follow Ups Full Thread
Follow Ups


You can not post to an archived thread.