I built a single channel 50 watt fender style from a bassman head that was damaged in a fire. I reused the filter caps and all seemed fine until the amp sat unused for about a week. There is now a strange distortion that seems to decrease the longer the amp is played. I just wonder if the dousing the filter caps got from the fire hose has caused them to retain moisture. The caps are Sprague Atoms that were installed in the amp about a year before the fire. Anyone have any experience with "wet" electrolytics?
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Originally posted by jvm View PostI built a single channel 50 watt fender style from a bassman head that was damaged in a fire. I reused the filter caps and all seemed fine until the amp sat unused for about a week. There is now a strange distortion that seems to decrease the longer the amp is played. I just wonder if the dousing the filter caps got from the fire hose has caused them to retain moisture. The caps are Sprague Atoms that were installed in the amp about a year before the fire. Anyone have any experience with "wet" electrolytics?
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Thanks for the suggestions, Prairie Dawg. I should have added that no other parts were reused other than the filter caps, transformers and tube sockets. I made a new board and built with all new components. I guess I will order new caps and eliminate them from the equation. Also, the amp sat unused for several years before I obtained it.
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Originally posted by jvm View PostI built a single channel 50 watt fender style from a bassman head that was damaged in a fire. I reused the filter caps and all seemed fine until the amp sat unused for about a week. There is now a strange distortion that seems to decrease the longer the amp is played.
I just wonder if the dousing the filter caps got from the fire hose has caused them to retain moisture.
The caps are Sprague Atoms that were installed in the amp about a year before the fire. Anyone have any experience with "wet" electrolytics?
Look for heat damage to wire insulation and corrosion on tube sockets, switches and pots too.Amazing!! Who would ever have guessed that someone who villified the evil rich people would begin happily accepting their millions in speaking fees!
Oh, wait! That sounds familiar, somehow.
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Can't believe no one caught this. You say you only salvaged the filters and transformers... Well I might suspect the transformers also. Lots of heat and moisture sensitive stuff in a transformer. If the transformers have paper bobbins they may be moist. If a chemical was used it may be reacting with the metals and "salting" creating little conductive pathways. If the transformers have mylar insulation they could have been damaged by the heat. If any transformer got hot enough I could even imagine the wrap insulation being damaged.
I hope replacing the filters fixes the problem for you. It probably will."Take two placebos, works twice as well." Enzo
"Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas
"If you're not interested in opinions and the experience of others, why even start a thread?
You can't just expect consent." Helmholtz
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