Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: tubeswell on January 14, 2013, 07:23:52 pm

Title: New T-bolty home brew
Post by: tubeswell on January 14, 2013, 07:23:52 pm
Knocked this one up in about a week from spare parts I had lying around. Made the cab, chassis, and main board by hand. Loosely based on a supro thunderbolt circuit ('65 version with 5U4G rectifier) with a 5k OT powered by 2 x cathode-biased 6L6 (6P3Se) driven by a paraphase inverter, but with a switchable parallel/single V1 (to use up that extra triode) and a James tone stack (which has excellent treble control and fantastic bass eq for geetar, and which you can enjoy because of the benefit of the low impedance V1 in parallel stage mode) instead of the 1-knob tilt control in the t-bolt. I used a 12" speaker because I couldn't fit a 15" speaker in the cab.

(http://farm9.staticflickr.com/8518/8378683737_e2a6fec128_b.jpg)

(http://farm9.staticflickr.com/8373/8378682717_d0d992d8ab_b.jpg)

(http://farm9.staticflickr.com/8463/8378765099_d9ebdd7198_b.jpg)

(http://farm9.staticflickr.com/8328/8381225422_0793726aa0_b.jpg)
Title: Re: New T-bolty home brew
Post by: jazbo8 on January 14, 2013, 08:27:24 pm
You da man! :worthy1: I really envy your skill with the chassis and cabinet and be able to knock something together just like that. You should give us all some pointers over at AX84 >> High Cost of Amp Building (http://www.ax84.com/bbs/dm.php?thread=472614)

Jaz
Title: Re: New T-bolty home brew
Post by: Willabe on January 14, 2013, 08:28:49 pm
Very Nice!

Have you played your Jazz Master through it yet?


       Brad     :icon_biggrin:
Title: Re: New T-bolty home brew
Post by: tubeswell on January 14, 2013, 10:14:04 pm
Quote from: Willabe on January 14, 2013, 08:28:49 pm
Very Nice!

Have you played youe Jazz Master through it yet?


       Brad     :icon_biggrin:

http://www.nzguitars.com/forum/download/file.php?id=10381 (http://www.nzguitars.com/forum/download/file.php?id=10381)

http://www.nzguitars.com/forum/download/file.php?id=10380 (http://www.nzguitars.com/forum/download/file.php?id=10380)

http://www.nzguitars.com/forum/download/file.php?id=10379 (http://www.nzguitars.com/forum/download/file.php?id=10379)

http://www.nzguitars.com/forum/download/file.php?id=10382 (http://www.nzguitars.com/forum/download/file.php?id=10382)
Title: Re: New T-bolty home brew
Post by: jjasilli on January 15, 2013, 10:27:05 am
 :smiley:
Title: Re: New T-bolty home brew
Post by: Willabe on January 15, 2013, 01:02:59 pm
I like it, I do! #'s 2 and 4.


         Brad      :icon_biggrin: