DAC90A Beginner

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DAC90A Beginner

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Stitch1

Technical Assistant

Posts: 15
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Location: Langley Park Co Durham

#20

23-03-2019, 07:24 AM

(21-03-2019, 05:43 PM)Pmarkandrewberry Wrote: ...

I've read about not using the UL41 pin 4 as a soldering tag, to help preserve the valve. Is this worth considering (and adding to the layout)?

...

I recently restored one of these but it had serious hum. I suspected the smoothing caps but these were fine so I tried the pin 4 mod and the difference was amazing. I’d say get it working first then try the mods and see for yourself if they make a difference.

John

valveradios.com

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Messages In This Thread

DAC90A Beginner - by markandrewberry - 19-03-2019, 05:25 PM

RE: DAC90A Beginner - by markandrewberry - 19-03-2019, 08:56 PM

RE: DAC90A Beginner - by Terry - 21-03-2019, 11:55 AM

RE: DAC90A Beginner - by Refugee - 19-03-2019, 10:18 PM

RE: DAC90A Beginner - by ppppenguin - 19-03-2019, 10:45 PM

RE: DAC90A Beginner - by Nick - 19-03-2019, 10:58 PM

RE: DAC90A Beginner - by boater sam - 20-03-2019, 02:44 AM

RE: DAC90A Beginner - by Ed_Dinning - 20-03-2019, 06:28 AM

RE: DAC90A Beginner - by markandrewberry - 20-03-2019, 07:37 AM

RE: DAC90A Beginner - by Old Sparky - 20-03-2019, 08:28 AM

RE: DAC90A Beginner - by Murphyv310 - 21-03-2019, 11:23 PM

RE: DAC90A Beginner - by Terry - 22-03-2019, 11:03 AM

RE: DAC90A Beginner - by ppppenguin - 20-03-2019, 08:55 AM

RE: DAC90A Beginner - by Ed_Dinning - 21-03-2019, 06:09 AM

RE: DAC90A Beginner - by Nick - 21-03-2019, 08:34 AM

RE: DAC90A Beginner - by markandrewberry - 21-03-2019, 05:43 PM

RE: DAC90A Beginner - by Stitch1 - 23-03-2019, 07:24 AM

RE: DAC90A Beginner - by Kalee20 - 25-03-2019, 01:13 PM

RE: DAC90A Beginner - by Murphyv310 - 22-03-2019, 11:24 AM

RE: DAC90A Beginner - by Old Sparky - 22-03-2019, 01:29 PM

RE: DAC90A Beginner - by Terry - 22-03-2019, 05:11 PM

RE: DAC90A Beginner - by Murphyv310 - 23-03-2019, 08:27 AM

RE: DAC90A Beginner - by boater sam - 23-03-2019, 09:52 AM

RE: DAC90A Beginner - by Terry - 23-03-2019, 11:40 AM

RE: DAC90A Beginner - by pwdrive - 23-03-2019, 11:46 AM

RE: DAC90A Beginner - by Murphyv310 - 23-03-2019, 11:52 AM

RE: DAC90A Beginner - by Murphyv310 - 23-03-2019, 11:47 AM

RE: DAC90A Beginner - by pwdrive - 23-03-2019, 12:05 PM

RE: DAC90A Beginner - by Crackle - 24-03-2019, 06:41 AM

RE: DAC90A Beginner - by Murphyv310 - 23-03-2019, 10:16 PM

RE: DAC90A Beginner - by boater sam - 23-03-2019, 11:14 PM

RE: DAC90A Beginner - by boater sam - 23-03-2019, 11:29 PM

RE: DAC90A Beginner - by ppppenguin - 24-03-2019, 07:26 AM

RE: DAC90A Beginner - by Murphyv310 - 24-03-2019, 08:16 AM

RE: DAC90A Beginner - by markandrewberry - 24-03-2019, 08:44 PM

RE: DAC90A Beginner - by ppppenguin - 25-03-2019, 01:27 PM

RE: DAC90A Beginner - by pwdrive - 25-03-2019, 03:21 PM

RE: DAC90A Beginner - by Terry - 25-03-2019, 06:17 PM

RE: DAC90A Beginner - by pwdrive - 25-03-2019, 06:41 PM

RE: DAC90A Beginner - by Kalee20 - 25-03-2019, 05:23 PM

RE: DAC90A Beginner - by ppppenguin - 25-03-2019, 05:30 PM

RE: DAC90A Beginner - by pwdrive - 25-03-2019, 05:37 PM

RE: DAC90A Beginner - by Murphyv310 - 25-03-2019, 05:58 PM

RE: DAC90A Beginner - by ppppenguin - 25-03-2019, 06:33 PM

RE: DAC90A Beginner - by Murphyv310 - 25-03-2019, 08:53 PM

RE: DAC90A Beginner - by markandrewberry - 02-04-2019, 12:22 PM

RE: DAC90A Beginner - by boater sam - 02-04-2019, 12:43 PM

RE: DAC90A Beginner - by markandrewberry - 02-04-2019, 12:50 PM

RE: DAC90A Beginner - by ppppenguin - 02-04-2019, 01:07 PM

RE: DAC90A Beginner - by Ed_Dinning - 02-04-2019, 06:40 PM

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