Search:

Type: Posts; User: Jazz P Bass; Keyword(s):

Page 1 of 18 1 2 3 4

Search: Search took 0.06 seconds.

  1. The 'Mute' circuit is the same as the main output...

    The 'Mute' circuit is the same as the main output mute.
    To unmute the TDA2052, Pin #3 must be +2.7 V above -V rail for the IC.
    That + voltage appears to come from an opamp before the header (preamp...
  2. Replies
    47
    Views
    871

    "I guess you mean IC rather than F&T ?" Yup....

    "I guess you mean IC rather than F&T ?"
    Yup.
    Thanks for the correction.
  3. Replies
    47
    Views
    871

    "Plate resistors & solder joints are the Achilles...

    "Plate resistors & solder joints are the Achilles heel of the Hot Rod series."
    Amen to that!
    And then there are the F&T capacitors......
  4. "If i go up to like 210 ohms for the bias...

    "If i go up to like 210 ohms for the bias resistor, will that kill the plate voltages?"

    Plate voltages will go lower.
    Not sure what you mean by 'kill'.
  5. Replies
    7
    Views
    203

    As far as I know, BK Butler always used J112's...

    As far as I know, BK Butler always used J112's for switching.
    Your matrix appears backwards.
    The J112 is an n channel jfet, meaning it is 'Normally On' until a Negative voltage is applied to the...
  6. Replies
    2
    Views
    2,503

    https://ampeg.com/support/files/Schematics/P%20Ser...

    https://ampeg.com/support/files/Schematics/P%20Series/PB800/
  7. That is a good, readable version....

    That is a good, readable version.
    https://music-electronics-forum.com/attachment.php?attachmentid=23216&d=1367758163
    Thanks.
    The one that I had on file was smudgy.
  8. Replies
    1
    Views
    109

    Wow! Nice. Must have taken some effort.

    Wow!
    Nice.
    Must have taken some effort.
  9. Replies
    4
    Views
    199

    http://www.exicon.info/cross-ref.php

    http://www.exicon.info/cross-ref.php
  10. Replies
    45
    Views
    1,330

    F1: 2A FB: High voltage supply. F2 & F3: 1A SB:...

    F1: 2A FB: High voltage supply.
    F2 & F3: 1A SB: Dc heater supply.
    F4; 10A FB: main AC heater supply.
    All values seem reasonable.

    Bugera was pulling your chain.
  11. Replies
    45
    Views
    1,330

    Here is a crop of the 333XL power supply. F4 is...

    Here is a crop of the 333XL power supply.
    F4 is stated as 10A Fast Blo.
    58398
  12. Replies
    3
    Views
    199

    There were some issues with the Sonzero 20 with...

    There were some issues with the Sonzero 20 with the FX loop causing hiss.
    Not sure if that is what you are describing....
  13. Here is a repost of the schematic: 58357

    Here is a repost of the schematic: 58357
  14. Agree. The heat will soften up the loctite. (it...

    Agree.
    The heat will soften up the loctite. (it will bubble)
    Plus the difference in thermal expansion of the PEM & the screw should give you a chance to remove the broken piece.
  15. The attachment icon is the 3rd from the right....

    The attachment icon is the 3rd from the right. (Insert Image)

    58321
  16. Replies
    20
    Views
    589

    Schematic link is dead. Here: 58313

    Schematic link is dead.
    Here: 58313
  17. Replies
    24
    Views
    643

    This guy drilled the case & inserted pins....

    This guy drilled the case & inserted pins.
    http://mrmodemhead.com/blog/fluke-170-series-kickstand-repair/
    It does look like a cheesy design.
  18. Replies
    5
    Views
    254

    "The problem is that I'm only getting 130V at the...

    "The problem is that I'm only getting 130V at the output pin of the EZ81.'

    It seems to me that 1/2 of the rectifier is not working.
    Replace the tube.
  19. Replies
    20
    Views
    392

    From post #8: "No , especially Q1 seems to be not...

    From post #8: "No , especially Q1 seems to be not conducting. Base-emitter voltages need to be between 0.5V and 0.7V for conduction."

    Have you replaced Q1?
  20. Replies
    41
    Views
    3,410

    58261 58262

    58261

    58262
  21. Thread: Ampeg

    by Jazz P Bass
    Replies
    13
    Views
    592

    Here is a zipped copy: 58197

    Here is a zipped copy: 58197
  22. Replies
    11
    Views
    307

    Schematic:...

    Schematic: http://dealers.korgusa.com/svcfiles/AC10C1_SManual.pdf

    F1: FUSE 200MA 250V EU/UK/AUS/SKOR
  23. Replies
    15
    Views
    3,677

    Or you can read this thread:...

    Or you can read this thread: https://music-electronics-forum.com/showthread.php?t=50916&p=555386#post555386
    The issue appears to be the footswitch jack itself.
    Read post #20- #23.
  24. Replies
    17
    Views
    8,620

    This thread may be of help....

    This thread may be of help.
    https://www.cyberciti.biz/faq/how-to-install-networked-hp-printer-and-scanner-on-ubuntu-linux/

    First line after "Introduction:" You need to install HPLIP (HP Linux...
  25. Replies
    0
    Views
    136

    Fishman Loudbox Acoustic

    I got in a Fishman Artist for repair.
    Ch #1: no output
    CH #2: full output

    Ch #1 was a bad opamp: easy peasy.
    Ch #2 was a whole nother can of worms.

    This amp is an absolute nightmare to work...
  26. Replies
    6
    Views
    362

    My son had the same issues with his older laptop...

    My son had the same issues with his older laptop (running Windows 10 Pro) in trying to take a test remotely.
    Couldn't see the camera.
    Ran the test from my wife's brand new laptop and bingo!
    So now...
  27. Ok. How about the Classic 50-50 (page 3/ stereo...

    Ok.
    How about the Classic 50-50 (page 3/ stereo switch): 57722

    Why did Peavey have so many models?
  28. Here is a copy of the 60-60 schematic. It...

    Here is a copy of the 60-60 schematic.
    It includes the full circuit.
    57668
Results 1 to 28 of 500
Page 1 of 18 1 2 3 4