Hello everyone,
It looks like I need some advice from the experts. After years of slowly collecting parts, working on other projects, and procrastinating--I finally built a Morrison Micro SE DC 2A3 stereo power amp. I followed the widely-available schematic very closely, with perhaps some more current available on the power transformer. Anyway, with all the tubes in, a load connected, and after settling down after turn on, I measure a B+ of about 436-438 volts. That is rather high compared to the published 400 volts. In any event, it does sound good.
I know that Morrison purposely runs the tubes hot and out of spec. I want to run it the way he planned rather than return everything to a "normal" operation. Do I need to make some adjustments to make it run according to his design? What should I do?
Any suggestions would be appreciated.
Best,
David
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Topic - Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - David Lawrence 13:12:13 12/08/22 (25)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - dave slagle 05:39:32 12/09/22 (15)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - Paul Joppa 16:53:12 12/09/22 (2)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - Ian L 11:49:15 12/10/22 (1)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - Paul Joppa 12:45:48 12/10/22 (0)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - Ian L 13:28:04 12/09/22 (2)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - dave slagle 18:17:56 12/09/22 (1)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - Ian L 11:31:02 12/10/22 (0)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - David Lawrence 09:54:07 12/09/22 (8)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - dave slagle 18:20:37 12/09/22 (0)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - David Lawrence 12:44:33 12/09/22 (6)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - dave slagle 18:25:01 12/09/22 (5)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - David Lawrence 10:40:33 12/12/22 (1)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - dave slagle 12:35:19 12/12/22 (0)
- Recall a conversation I had with him at an audio show... - Ivan303 06:33:08 12/10/22 (1)
- RE: Recall a conversation I had with him at an audio show... - Paul Joppa 09:04:27 12/10/22 (0)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - sony6060 19:01:08 12/09/22 (0)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - je2a3 17:38:06 12/08/22 (0)
- Measure the filament voltage - Alpha Al 16:29:46 12/08/22 (2)
- RE: Measure the filament voltage - Tre' 16:43:12 12/08/22 (1)
- RE: Measure the filament voltage - Alpha Al 05:59:08 12/11/22 (0)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - Tre' 13:30:39 12/08/22 (4)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - David Lawrence 13:56:47 12/08/22 (3)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - Tre' 14:31:24 12/08/22 (2)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - David Lawrence 15:05:02 12/08/22 (1)
- RE: Hi B+ on Morrison Micro (moved from Tube DIY Asylum) - Tre' 16:42:17 12/08/22 (0)