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Originally Posted by ac15
I just bought a J-20 Jet and I must say, it has potential. I will probably upgrade the speaker and tubes as suggested by some, but the basic sound seems to be very good, clear and as you said, surprisingly loud. I'm wondering if you had an issue like I'm having, where the amps hums VERY loudly. Sounds like some kind of grounding thing. It's not my single coil pickups either, because none of my other amps are this noisy. Since it's a simple circuit, I'm thinking my tech can look at it and fix it, but just wondering if you had this issue. I feel like it has the potential to be a really, really nice amp, but will need a couple tweaks first.
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I have read that it is extremely sensitive to any interference in the signal chain, so it was suggested to use quality, shielded cables, a good power source and even a noise gate in front of the guitar.
If you get a handle on this issue, please post. I'd love to hear that there's a low cost solution to this issue. It would be a crime to charge $850 for an amp that can't be used for recording!
Thanks.