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Fender Acoustasonic Junior (pre DSP) - reverb hum
I have a second hand older Fender Acoustasonic Junior (pre DSP) that looks to be mint condition in which the reverb wasn't working. It sounded good, just...
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Awesome ... Thanks Enzo
15v at all of the appropriate op amp pins, the heat at the blocking resistors is as designed. My issue appears to be in the...
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forgive me for resurrecting this old thread ... I'm in need of these schematics (and all of the previous links appear to be broken). I have the same issue...
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Once I corrected whatever was wrong with the input wiring and switched the leads on the fidelity pot, this thing come to life. And I have to admit that...
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woohoo ... It Works
It looks like it was the input jacks. I stole some switchcrafts from another project, an now it produces music (still...
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Nope ... it doesn't work with the guitar.
The grounds all measure out correctly and don't show up any place undesirable.
The hum can be varied...
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No luck ... just a loud hum and now guitar amplification ... I've double/triple checked my schematic to my layout and chased all of the wiring from the board...
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With the preamp tubes installed my B+ voltages fall right in line (B+0 = 435, B+1 = 335, B+2 = 280) ... phew. Now I get to troubleshoot why it has has an...
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I've standardized my builds to include the el34 conversion of tieing the suppressor grid to the cathode (I need to modify my power tube component in the schematic...
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Well ... It's finally built
Well ... It's finally built
I scored an old Gibson GA-10 which prompted me to continue with this build....
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... Continuous with nothing plugged in. I'd like to put an A/B foot switch into the two channels and use it for channel switching.
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yes, the squeal is continuous and can be turned down with the channel volume which sometimes removes the squeal, but more often the amp has to be powered...
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Yes, the amp sounds great if I'm plugged into either input of either channel, until of course I unplug to plug into one of the other inputs. Should I be...
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'65 TRRI squeals when input is unplugged
My '65 Twin Reverb Re-Issue squeals loudly if I unplug an input while it's live, sometimes it happens if I throw it into standby before unplugging. Not sure...
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Atomic Reactor 112-50 schematic needed
A buddy of mine has an Atomic Reactor 112-50 that is plaguing him with an intermittent low output issue. Does anybody know of any known issues with these?...
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OK ... I've scored a Plitron 654708 as a PT for this project. At 290VAC@.6A and 6.3VAC@8A, I shouldn't have any issues of overheating the PT. But, I'll...
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Thanks Guys ...
I stopped by Torres Engineering this weekend, where I was able to play thru a couple of Gibson circuited amps, and talk to them...
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Yes ... I do need to re-assess my transformer selection. My first build was a 5E3 clone which has been morph'd a few times into different builds. I've added...
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