Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: attilan on September 05, 2023, 06:35:59 am

Title: Orange TH-30 clone
Post by: attilan 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.

Title: Re: Orange TH-30 clone
Post by: attilan on September 05, 2023, 06:54:23 am

There is the pcb-s / full size A4 format

Title: Re: Orange TH-30 clone
Post by: sluckey on September 05, 2023, 08:35:36 am

Ambitious project. Nice work!

Title: Re: Orange TH-30 clone
Post by: kagliostro on September 06, 2023, 01:00:13 am

Very COOL job 👍👍👍

Franco

Title: Re: Orange TH-30 clone
Post by: Latole on September 06, 2023, 03:39:40 pm

Very nice job !

Title: Re: Orange TH-30 clone
Post by: attilan 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!

Title: Re: Orange TH-30 clone
Post by: kagliostro 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

Title: Re: Orange TH-30 clone
Post by: attilan 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

Title: Re: Orange TH-30 clone
Post by: kagliostro on September 07, 2023, 04:01:45 am

👍

I saw it is something nice but unusual

Thanks

Franco

Title: Re: Orange TH-30 clone
Post by: attilan 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.

Title: Re: Orange TH-30 clone
Post by: elams1894 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!

Title: Re: Orange TH-30 clone
Post by: attilan 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.