Welcome To the Hoffman Amplifiers Forum

September 06, 2025, 04:35:43 pm
guest image
Welcome, Guest. Please login or register.
-User Name
-Password



Hoffman Amps Forum image Author Topic: EH-150/185 build complete  (Read 1867 times)

0 Members and 1 Guest are viewing this topic.

Offline Jerry garrcia

  • Level 1
  • *
  • Posts: 92
  • I love Tube amps
Hoffman Amps Forum image
EH-150/185 build complete
« on: July 28, 2022, 03:02:50 am »
The build is finally completed.
Had lack of space in the chassis so instead of the three 6SQ7 tubes in the preamp section I used a 6SC7 so I could get rid of a tube socket. Also used a 6SN7 PI instead of the 6N7 in the original circuit. No field coil so took a PT with lower voltage and used resistors an a choke for the preamp section. Plate voltages of the 6L6’s 283V so in the ballpark of the original one.
Reverb driver a LNDVerb with mosfets. Short tank.

Offline bmccowan

  • Level 3
  • ***
  • Posts: 1744
  • Better builder than player
Hoffman Amps Forum image
Re: EH-150/185 build complete
« Reply #1 on: July 29, 2022, 07:36:24 pm »
Cool - how do you like the sound? I like the sound of 6L6s at that 300V +/-. I built the other version of the EH-185 - the one with a gaggle of 6SJ7s with some help here figuring out the strange inductor bass control. Need to change that as there is a reason other amps do not use an inductor there. I've also been thinking of converting it to the 6SQ7 version - no particular reason.
Mac
“To my surprise, when I opened my eyes, I was the victim of a great compromise.”
John Prine

 


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