Welcome To the Hoffman Amplifiers Forum

September 06, 2025, 12:54:28 pm
guest image
Welcome, Guest. Please login or register.
-User Name
-Password



Hoffman Amps Forum image Author Topic: Orange TH-30 clone  (Read 8761 times)

0 Members and 1 Guest are viewing this topic.

Offline attilan

  • Level 1
  • *
  • Posts: 6
  • fav. Tube amps
Hoffman Amps Forum image
Orange TH-30 clone
« on: September 05, 2023, 06:35:59 am »
I build this great amplifier, which is a two final tube version of the Orange TH-30 with small modifications.The schematic, which I had a hard time finding, was love at first sight. Two separate channels controlled with footswitch, excellent clean sound, and the great sounding shape pot on the dirty channel.
It's important to know that the schematics that are available contain few errors. The B parts of V2 and V4 are drawn upside down. I have successfully fixed this error.
I only use two tubes in the final stage, which is perfectly enough for a 12 inch cabinet. That's why I dared to name this clone TH-18.
Some small changes were also made in the power supply for eliminate hum successfully.
I think it was worth the trouble, the amplifier works very well.
« Last Edit: September 07, 2023, 04:05:22 am by attilan »

Offline attilan

  • Level 1
  • *
  • Posts: 6
  • fav. Tube amps
Hoffman Amps Forum image
Re: Orange TH-30 clone
« Reply #1 on: September 05, 2023, 06:54:23 am »
There is the pcb-s / full size A4 format

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: Orange TH-30 clone
« Reply #2 on: September 05, 2023, 08:35:36 am »
Ambitious project. Nice work!
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline kagliostro

  • Level 5
  • *******
  • Posts: 7739
Hoffman Amps Forum image
Re: Orange TH-30 clone
« Reply #3 on: September 06, 2023, 01:00:13 am »
Very COOL job 👍👍👍

Franco
The world is a nice place if there is health and there are friends

Offline Latole

  • Level 4
  • *****
  • Posts: 2522
Hoffman Amps Forum image
Re: Orange TH-30 clone
« Reply #4 on: September 06, 2023, 03:39:40 pm »
Very nice job !

Offline attilan

  • Level 1
  • *
  • Posts: 6
  • fav. Tube amps
Hoffman Amps Forum image
Re: Orange TH-30 clone
« Reply #5 on: September 07, 2023, 12:18:55 am »
In a waiting for a few Marshall style knobs
Of course, the Vintage name is just decoration
..and thanks for the reviews!
« Last Edit: September 07, 2023, 01:21:31 am by attilan »

Offline kagliostro

  • Level 5
  • *******
  • Posts: 7739
Hoffman Amps Forum image
Re: Orange TH-30 clone
« Reply #6 on: September 07, 2023, 02:07:10 am »
A pair of questions

Where did you find the back chromed grid and that spring retainer for the pair of power tubes ?

THANKS

Franco
The world is a nice place if there is health and there are friends

Offline attilan

  • Level 1
  • *
  • Posts: 6
  • fav. Tube amps
Hoffman Amps Forum image
Re: Orange TH-30 clone
« Reply #7 on: September 07, 2023, 03:43:44 am »
The back chromed grid I „borrowed” it from a tool presentation panel. Unique piece :)
I made this spring retainer myself. It was easy

Offline kagliostro

  • Level 5
  • *******
  • Posts: 7739
Hoffman Amps Forum image
Re: Orange TH-30 clone
« Reply #8 on: September 07, 2023, 04:01:45 am »
👍

I saw it is something nice but unusual

Thanks

Franco
The world is a nice place if there is health and there are friends

Offline attilan

  • Level 1
  • *
  • Posts: 6
  • fav. Tube amps
Hoffman Amps Forum image
Re: Orange TH-30 clone
« Reply #9 on: July 06, 2025, 04:02:54 pm »
Hi everyone. I rebuilt the previous amplifier which was supposed to be the 18w version of the Orange TH-30.
It got a new look, similar to the Orange family design, and I named it Dexter. I solved the effects part with a transistor module. I added half of the freed tube to the clean channel to balance the clean and dirty channels. I added a Mid boost switch, which works really well, and an adjustable boost switch pedal.
I hope I finally finished this project. It really sounds hot now.

Offline elams1894

  • Level 1
  • *
  • Posts: 24
  • I love Tube amps
Hoffman Amps Forum image
Re: Orange TH-30 clone
« Reply #10 on: July 11, 2025, 05:39:01 am »
Well done. Nice clean build. There is a heck of alot going on in there and you've done super well to get it all organised and neat. Also the cab! Hats off!

Offline attilan

  • Level 1
  • *
  • Posts: 6
  • fav. Tube amps
Hoffman Amps Forum image
Re: Orange TH-30 clone
« Reply #11 on: July 13, 2025, 01:18:36 pm »
Thank you so much. I'll share the layout as well, but it's still a bit incomplete.
« Last Edit: July 13, 2025, 01:34:56 pm by attilan »

 


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