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In Reply to: RE: Questions about the DRD circuit... posted by onemug on April 12, 2015 at 12:10:11
Hi,
The DRD circuit is not especially harder than others, the voltage across the 300B is cold is more, but for 300B I would suggest a slow warm-up rectifier (GZ34 etc.) or a delayed start for the HT no matter what, as full HT on the cold 300B is likely not the best thing, no matter what.
Ciao T
At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to untolerable pain. Really, what more could we need?
Follow Ups:
My DRD's do have the 5ar4 rectifiers, so you feel this circuit is not too hard on my WE300b's, correct?
Hi,
Yes, I would say it will be ok, the 300B cathode should be hot before the 5AR4 passes current, so everything will just start up gently.
Ciao T
At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to untolerable pain. Really, what more could we need?
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