Welcome To the Hoffman Amplifiers Forum

September 07, 2025, 05:30:20 am
guest image
Welcome, Guest. Please login or register.
-User Name
-Password



Hoffman Amps Forum image Author Topic: Guyatone Reverb Combo GA-1030 - mystery tube  (Read 4311 times)

0 Members and 1 Guest are viewing this topic.

Offline Madison

  • Level 3
  • ***
  • Posts: 1911
  • What's up slobbies?
    • Funky Dolphins
Hoffman Amps Forum image
Guyatone Reverb Combo GA-1030 - mystery tube
« on: August 17, 2013, 02:53:09 am »
Have this on the bench.
The tremolo driver tube is a 9 pin.
J85 0305 with "467" painted on the side of it.

Got the amp working fine but just wondered about this tube.
An 12at7 variant?

Amp is a Princeton copy, diode driven, with 2xEL84s and a Pioneer speaker.
Pretty cool actually.

No, I don't have a schematic on this one.Figured it out though.

Offline eleventeen

  • Level 4
  • *****
  • Posts: 2229
Hoffman Amps Forum image
Re: Guyatone Reverb Combo GA-1030 - mystery tube
« Reply #1 on: August 17, 2013, 01:48:36 pm »
Boy, tell me that silverface Fender front panel doesn't look like a Fender! (to these old eyes)

Offline Willabe

  • Global Moderator
  • Level 5
  • ******
  • Posts: 10524
Hoffman Amps Forum image
Re: Guyatone Reverb Combo GA-1030 - mystery tube
« Reply #2 on: August 17, 2013, 01:58:45 pm »
Boy, tell me that silverface Fender front panel doesn't look like a Fender! (to these old eyes)

Looks like a SF drip edge Fender to me.     :icon_biggrin:

Got the amp working fine.

No, I don't have a schematic on this one. Figured it out though.

Cool! Good job!   


               Brad      :icon_biggrin:

 


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