Welcome To the Hoffman Amplifiers Forum

September 06, 2025, 12:12:17 am
guest image
Welcome, Guest. Please login or register.
-User Name
-Password



Hoffman Amps Forum image Author Topic: G-K 250RL Schem wanted  (Read 6517 times)

0 Members and 1 Guest are viewing this topic.

Offline Shrapnel

  • Level 3
  • ***
  • Posts: 548
  • Intelligence is good. Wisdom is better.
Hoffman Amps Forum image
G-K 250RL Schem wanted
« on: December 21, 2009, 11:30:27 pm »
I've got a Gallien-Krueger Model 250RL Stereo Guitar Amp here that I need a schem for, anyone got one?  It isn't blowing fuses, but it has no signal out, not even at the phones jack. I think a schem would go a long way in helping me with this thing. (It's been sitting in my closet a couple of years now.)
-Later!

"All the great speakers were bad speakers at first" - Ralph Waldo Emerson

Offline 6G6

  • Level 3
  • ***
  • Posts: 889
  • I love tube amps
Hoffman Amps Forum image
Re: G-K 250RL Schem wanted
« Reply #1 on: December 23, 2009, 05:21:45 am »
Have you tried to contact G-K?
They sent me a schem for my 400RB, when I asked.
They also gave me some of the grey knob inserts that keep falling out,
no charge!

Offline Shrapnel

  • Level 3
  • ***
  • Posts: 548
  • Intelligence is good. Wisdom is better.
Hoffman Amps Forum image
Re: G-K 250RL Schem wanted
« Reply #2 on: December 23, 2009, 11:20:31 pm »
I have not yet, but I think that may be in order now that you mention it.

Thanks for the heads up.

[edit] e-mail sent. to parts.

[edit - 02 Jan 2010] Just a wait and see now, as I guess the holidays has slowed things down a bit. LOL.

[edit - 07 July 2010] Either my email never made it, or they blew it off. I have YET to receive a response, positive or negative, from them.
« Last Edit: July 08, 2010, 01:49:31 am by Shrapnel »
-Later!

"All the great speakers were bad speakers at first" - Ralph Waldo Emerson

Offline RicharD

  • SMG
  • Level 4
  • *****
  • Posts: 2057
    • Toxic Water
Hoffman Amps Forum image
Re: G-K 250RL Schem wanted
« Reply #3 on: July 09, 2010, 04:53:44 pm »
I have a MB150E on the bench.  My eMail was ignored.  I picked up the phone and called them.  I had the schematic eMailed before I hung up the phone.  Very very nice and professional to deal with.  Asked for the preamp board number to make sure I got the right schematic.  Simple trace from there.  Appears to have been a bad JFET.  It's been running for 45 minutes w/o issue.

Offline Shrapnel

  • Level 3
  • ***
  • Posts: 548
  • Intelligence is good. Wisdom is better.
Hoffman Amps Forum image
Re: G-K 250RL Schem wanted
« Reply #4 on: July 11, 2010, 05:13:40 pm »
I have a MB150E on the bench.  My eMail was ignored.  I picked up the phone and called them.  I had the schematic eMailed before I hung up the phone.  Very very nice and professional to deal with.  Asked for the preamp board number to make sure I got the right schematic.  Simple trace from there.  Appears to have been a bad JFET.  It's been running for 45 minutes w/o issue.

Thx for the tip, That will be my next step then.
-Later!

"All the great speakers were bad speakers at first" - Ralph Waldo Emerson

 


Choose a link from the
Hoffman Amplifiers parts catalog
Mobile Device
Catalog Link
Yard Sale
Discontinued
Misc. Hardware
What's New Board Building
 Parts
Amp trim
Handles
Lamps
Diodes
Hoffman Turret
 Boards
Channel
Switching
Resistors Fender Eyelet
 Boards
Screws/Nuts
Washers
Jacks/Plugs
Connectors
Misc Eyelet
Boards
Tools
Capacitors Custom Boards
Tubes
Valves
Pots
Knobs
Fuses/Cords Chassis
Tube
Sockets
Switches Wire
Cable


Handy Links
Tube Amp Library
Tube Amp
Schematics library
Design a custom Eyelet or
Turret Board
DIY Layout Creator
File analyzer program
DIY Layout Creator
File library
Transformer Wiring
Diagrams
Hoffmanamps
Facebook page
Hoffman Amplifiers
Discount Program


password