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treble knob morphs into vol knob?!?!
Greetings from the Great White Afterthought,
On a Garne 3-tube amp, I replaced the "normal" jack and the "brite" jack. I didn't go near the treble, vol or bass pots, but when I powered the thing up the treble knob supplied the volume and vice versa. While I fiddled with the thing they changed back to "normal" for a while then into "bizarro" mode once again and so on back and forth. All the while there was no crackling or hum to suggest a loose wire or bad contact or ground fault. I know nothing about tube theory and only slightly more about transistors. Anybody got a clue what's going on? Thanks in advance, Gil |
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#3
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I'm assuming you used the same type of jack receptacle as a
substitute? Aeiii! That must be it. The original"normal" jack had this weird extra metal strip in front of and about a mm away from the main(taller) contact. I replaced it with a typical Radio Shack type(stereo) wired up to take a mono plug. I'll have to dig the old one out of the trash and see if I can trace its operation. The one labeled "brite" was a simple, mono jack. It also got the Radio Shack treatment. But why the swapping back and forth? That's the only thing I could come up with, and it may well be wrong. Maybe you should post this quesion in alt.guitar.amps, there are some grey bearded gurus there who might recognize this problem. I did, thanks for the tip! |
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