FDP Home Page / FDP Forum / FAQ's
![]() |
![]() |
![]() |
The FDP is made possible by the following companies and individual members like
you.
Please use the links below to show them we value their
sponsorship.
![]() Apex Tube Matching |
![]() Jensen Loudspeakers |
![]() Amplified Parts |
![]() Yellowjackets Tube Converters |
![]() Antique Electronics Supply |
![]() WD Music |
![]() Sweetwater |
![]() MOD KITS DIY |
* God bless America and our men and women in uniform * * Illegitimi non carborundum! * Please help support us in our FINAL MONTH: make a Donation
THE FDP IS CLOSING AT THE END OF THE YEAR.
|
Search the Forums |
FDP Forum / Amp Mods, Repairs, and Projects / Trying to repair Fender Hot Rods and various re-issues.
FDP Forum / Amp Mods, Repairs, and Projects / Trying to repair Fender Hot Rods and various re-issues.
rockman627
New YorkMay 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 EmeritusMay 26th, 2019 08:11 AM Edit Profile
That's an AC signal voltage...you're reading DC.
w
rockman627
New YorkMay 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 EmeritusMay 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
**********
**********
**********
****
Planet Peegoo
Rhythm & Lewd GuitaristMay 26th, 2019 06:11 PM Edit Profile
Willie rocks!
willie
Too Near Atlanta GA
Amp Tech EmeritusMay 26th, 2019 10:07 PM Edit Profile
Mostly on the front porch... :)
w
rockman627
New YorkJun 6th, 2019 08:46 PM Edit Profile
please check out part 2 of this post.
Moderators: Chris Greene reverendrob
FDP, LLC Privacy Policy: Your real name, username, and email
are held in
confidence and not disclosed to any third parties, sold, or
used for
anything other than FDP Forum registration unless you specifically
authorize disclosure.
Copyright © 1999-2019
Fender Discussion Page, LLC All Rights Reserved