Welcome To the Hoffman Amplifiers Forum

September 06, 2025, 06:33:51 am
guest image
Welcome, Guest. Please login or register.
-User Name
-Password



Hoffman Amps Forum image Author Topic: Lamington Reverb with Mods Layout  (Read 2962 times)

0 Members and 1 Guest are viewing this topic.

Offline dogburn

  • Level 2
  • **
  • Posts: 126
  • Meddling Kid (but older)
Hoffman Amps Forum image
Lamington Reverb with Mods Layout
« on: June 17, 2023, 11:14:54 am »
Hi all - this is my first topic posting here after lurking here for some time (and getting a lot of good info). I'm not an expert at tube amp design/building, but I have built a 6G2 Princeton and AA764 Champ (both with various mods), and know enough not to get myself zapped.

For one of my next projects, I'm aiming to build a Lamington Reverb and incorporate various mods, including ones I've seen posted here. There was no easily available layout file for the Lamington Reverb, so I made one with DIYLC, which I'm posting below. It's the first time I've created a layout from scratch based on a schematic, so I'd appreciate it if people could look it over and debug it as needed. (And when I say created from scratch, basically I took one of Rob Robinette's DIYLC files and used it as a template.)

I'm also posting a couple of the files from the forum including the modified schematic and added filter scheme.

Mods/deviations from original Lamington Reverb include:
Using a toroidal transformer with 240V and 6.3V secondaries
Parallel Heater wiring, plus artificial center tap for 6.3V
Added filter stage
Added Grid stopper for input
Jack for footswitch
Pot for adjusting dry level



Offline Williamblake

  • Level 2
  • **
  • Posts: 482
  • I just picked values that I've seen in other circu
Hoffman Amps Forum image
Re: Lamington Reverb with Mods Layout
« Reply #1 on: June 17, 2023, 07:12:12 pm »
Your deviation from the lamington reverb also includes not mixing on the input, which is a step forward in my opinion. But the proof is in the reverbing.

Offline dogburn

  • Level 2
  • **
  • Posts: 126
  • Meddling Kid (but older)
Hoffman Amps Forum image
Re: Lamington Reverb with Mods Layout
« Reply #2 on: June 17, 2023, 10:00:04 pm »
When I get around to building it, I will let people know how the reverbing goes. Hopefully in the next month or two.

Offline chris s

  • Level 1
  • *
  • Posts: 10
  • I love Tube amps
Hoffman Amps Forum image
Re: Lamington Reverb with Mods Layout
« Reply #3 on: April 04, 2025, 01:00:38 am »
Did you ever build this? I have a lamington reverb and curious about tweeks and mods.

Offline dogburn

  • Level 2
  • **
  • Posts: 126
  • Meddling Kid (but older)
Hoffman Amps Forum image
Re: Lamington Reverb with Mods Layout
« Reply #4 on: April 04, 2025, 09:02:12 am »
I did build it, and it was working. It had too much hum and I wasn't very impressed by the reverb sound itself, so I didn't spend the time to eliminate the hum and I'm repurposing the parts.

 


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