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Bush Radio DAC 90A
#3

Mike;
  Thanks for reminding me of your Telefunken thread, I had almost forgotten about that. One thing I will do is check the tubes and see if the UY41 is any good, if not then double silicon diodes it is. I was mostly thinking of using it as it will offer a controlled rise in the B+ voltage rather then an instant on before the rest of the heaters have a chance to warm up. The UY41 only consumes 31 volts at 100 ma, I'm not sure how close I could get with a capacitive dropper, should I chose to eliminate it but maybe? You bring up a good point about the ground reference, I've heard this is also a reason NOT to retrofit a bridge rectifier into an AC/DC set that had a half wave selenium rectifier in it originally, and I think your thread confirms this, at least with regard to that Telefunken.
Regards
Arran


Messages In This Thread
Bush Radio DAC 90A - by Arran - 04-21-2024, 07:11 PM
RE: Bush Radio DAC 90A - by morzh - 04-21-2024, 07:47 PM
RE: Bush Radio DAC 90A - by Arran - 04-21-2024, 08:38 PM
RE: Bush Radio DAC 90A - by morzh - 04-21-2024, 09:39 PM
RE: Bush Radio DAC 90A - by Arran - 04-24-2024, 11:27 PM
RE: Bush Radio DAC 90A - by Arran - 04-28-2024, 03:13 PM
RE: Bush Radio DAC 90A - by Arran - 04-30-2024, 01:48 PM



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