jnl636
Newbie Alert
Joined: 18 Oct 2006
Posts: 3
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 Posted: Mon Dec 11, 2006 7:24 am Post subject: Gibson GA 25RVT 1965 w/ 7591's "HAWK" |
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It’s a 1965. Ok bad hum when turned on. Lower freq than 60hz.Replaced the filter caps 20mf @ 400 (Big Brown things) with 22uf @500 Tech caps. Tied negatives together to BLK and ran 2 positives to reds. Did on all 3 caps.
Still have hum. Replaced outputs because I had a pair. Still hum. Can remove all tubes except the outputs and still have hum. Controls have no affect. Please help.
V1= 6EU7 V2= 12AU7 V3= 6EU7 V4= 12AU7 V5 & V6= 7591 V7=12AU7 No rectifier tube. Some people say it more resembles a GS-35RVT. No audio I can pull all the tube except the outputs and will still get hum (motor boating sound). |
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