Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Effects => Topic started by: TIMBO on June 01, 2026, 12:08:19 am

Title: Jfet based on board guitar booster
Post by: TIMBO on June 01, 2026, 12:08:19 am

Hey guys, got a couple of DIY guitar builds happing and looking for booster circuit I can add.
Anyone got anything up their sleeve.
Thanks

Title: Re: Jfet based on board guitar booster
Post by: acheld on June 01, 2026, 10:21:08 am

I've used this a few times.  Works fine.

Title: Re: Jfet based on board guitar booster
Post by: TIMBO on June 02, 2026, 04:54:53 am

Thanks mate.
Found a couple of BC547 transistors in my junk box and found this..
ggg_geb_npn_sc.pdf (https://generalguitargadgets.com/pdf/ggg_geb_npn_sc.pdf)
Will fit on a small piece of vero board

Title: Re: Jfet based on board guitar booster
Post by: TIMBO on June 22, 2026, 04:00:47 am

Hey guys
Found this circuit...
(https://i.imgur.com/c4JXFjQ.jpg)
Sounded good(on utube)and all parts found at the local Geek store
After a bit of a non starter(cold joint on a cap) and sounded good to me.
The second (TL071) I'll finish wiring up a compare sounds
Very useable effect   :headbang: