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Topic: 6505 +112 Combo |
Ron Wood
From:
Waseca, Minnesota, USA
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Posted 16 Sep 2024 12:51 pm |
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Peavey 6505 + 112 COMBO amplifier
Working on one of these. Have lower than normal filament voltage at the 12 AX 7s.
I'd like to get a set of DC voltages for this. Peavey has been non-respondent. They have a Forum.Peavey.com where I asked for DC voltages. A forum responder said the DC voltages are available on the schematic. Well no DC voltages are on the schematic I have except for a few I've written in.
There is supposed to be a good Peavey repair shop in Savage, MN. Has anyone used that shop? |
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John Fields
From:
Collinsville, Mississippi; USA
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Posted 17 Sep 2024 5:18 am
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The DC heater supply should be putting out around 6.3VDC. The real problem is that you need to swap the 1N4003 diodes in the DC heater bridge with 1N5402 parts to handle the turn on surge. It's not a bad idea to swap the caps, as well.
_________________
Thanks,
John C. Fields
Peavey's MI Amplifier Engineering Manager (1997-current) Hessiemae Electronic Services (repairs/mods/parts)
hessiemae@hotmail.com
601-934-2163
CONTACT ME FOR VINTAGE PEAVEY REPAIRS |
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Ron Wood
From:
Waseca, Minnesota, USA
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Posted 18 Sep 2024 4:14 pm
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| John Fields wrote: |
| The DC heater supply should be putting out around 6.3VDC. The real problem is that you need to swap the 1N4003 diodes in the DC heater bridge with 1N5402 parts to handle the turn on surge. It's not a bad idea to swap the caps, as well. |
Thanks John, I'll be following up to change out the diodes. I've already changed all the electrolytic caps in the unit. |
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