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FDP Forum / Amp Mods, Repairs, and Projects / Trying to repair Fender Hot Rods and various re-issues.

rockman627

New York

May 25th, 2019 08:28 PM   Edit   Profile  

I got a part time job with a back line company and I've been doing some amp repair, with a modicum of success.My first question is how reliable are the schematics Fender currently put out? For example, TP9 in the TRRI schematic says 67v, but I read about 449v. That seems to match what the original Twin Reverb AB763 schematic says should be at the 12AT7 reverb driver tube. If I can't trust the schematic, I'm really going to have a hard time.

willie

Too Near Atlanta GA

Amp Tech Emeritus
May 26th, 2019 08:11 AM   Edit   Profile  

That's an AC signal voltage...you're reading DC.

w

rockman627

New York

May 26th, 2019 12:10 PM   Edit   Profile  

Did I miss something? Does it say anywhere on the schematic all voltages are AC? Thanks for clearing that up.

willie

Too Near Atlanta GA

Amp Tech Emeritus
May 26th, 2019 04:34 PM   Edit   Profile  

Just the Test Points that are in the ovals...the DC voltages are not.

w

Peegoo
Contributing Member
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Planet Peegoo

Rhythm & Lewd Guitarist
May 26th, 2019 06:11 PM   Edit   Profile  

Willie rocks!

willie

Too Near Atlanta GA

Amp Tech Emeritus
May 26th, 2019 10:07 PM   Edit   Profile  

Mostly on the front porch... :)

w

rockman627

New York

Jun 6th, 2019 08:46 PM   Edit   Profile  

please check out part 2 of this post.


FDP Forum / Amp Mods, Repairs, and Projects / Trying to repair Fender Hot Rods and various re-issues.




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