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ampage archive
Vintage threads from the first ten years
| previous: Bruce Re: "swooshing" noise in 77 SF champ -- 5/30/1999 11:06 AM |  |
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Re: dissapearing "swooshing" noise in 77 SF champ
 5/31/1999 5:26 PM |
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Colin | Re: dissapearing "swooshing" noise in 77 SF champ Hi Bruce: Thanks for the reply, To answer some of your questions, the 12ax7 and 6v6 are both new (although the 6v6 is Sovtek, It's all I could find here in Halifax Nova Scotia..) I haven't had a chance to double check the bias settings yet but as soon as I do I'll post them. The sound seems to have dissappeared, Benjamin (post below) thought it may have been due to the caps not being formed, all I did was replace them all and power up. I have double checked all the grounds, resoldered all the connections, I changed the 470 ohm cathode bias resistor to a 510 ohm to try and run the Sovtek a little cooler and I also added a 1K 3watt screen resistor on the power tube. Right now the amp sounds great, with just a very faint background hum. Any way I'll check the bias as suggested.. Colin |
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| Bruce OK! |