Truxton board with very low sound

PCB problems and fixes
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slk486
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Truxton board with very low sound

Post by slk486 » November 7th, 2019, 7:44 am

I am having a sound issue with my original Truxton. When I unpacked it from storage recently and plugged it in to my Egret II, it had very very low sound and possibly lacking base. I can't turn the cab volume up high enough to compensate at all. Very sure it was not like that last time I plugged it in, but it has been in storage for a couple of years. It looks like a previous owner removed the volume pot, disconnected the pins of the amp and bridged it on the underside, but as I mentioned, it was working fine previously.

I've replaced the two larger caps, but before doing all the others (some not being used at all with the amp bypassed), I figured for expert advice.

A member on schmups suggested restoring the amp and volume pot, but that is a last resort since it seems to me that can't be the actual issue.

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frsj8112
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Re: Truxton board with very low sound

Post by frsj8112 » November 20th, 2019, 12:44 pm

Have you tried the pcb in another cabinet/supergun setup?

slk486
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Re: Truxton board with very low sound

Post by slk486 » November 20th, 2019, 12:49 pm

Unfortunately I do not have another setup with me as my supeguns are in storage, but as mentioned, I didn't notice any sound issue when I last had it in the same cab.

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frsj8112
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Re: Truxton board with very low sound

Post by frsj8112 » November 20th, 2019, 1:47 pm

I would make one of those audio-probes and listen to the outputs of the OP-amps. Look for logs regarding this on jammarcade

slk486
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Re: Truxton board with very low sound

Post by slk486 » November 20th, 2019, 1:52 pm

Cool, will try that, thanks.

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