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Messages - thomasha

#256
Requests / Re: Sub-mini tube amps
May 12, 2014, 01:51:27 AM
Hi, here comes the sound sample!

Cheers, Thomas
#257
Requests / Re: Sub-mini tube amps
May 11, 2014, 02:30:11 AM
I think Frequency Central was interested in making some PCB's to sell.
this is a smaller version, and the build is a bit more difficult, to make all the components fit in such a little space.

If you're interested i can send you my layout, or the normal version.

#258
Requests / Re: Sub-mini tube amps
May 10, 2014, 10:02:37 PM
Well, another one!
now a superfly in a 1590a!





Greetings
Thomas
#259
Requests / Re: Sub-mini tube amps
November 04, 2013, 10:46:59 AM
Yes, it is an all-tube amp, the output transformer is a Hammond 125a, and i guess the full distorted volume has aprox. 1W

Some gut shots!




it's a small turret board build

and Schematic!

https://dl.dropboxusercontent.com/u/10420127/submini%20JCM800.pdf
Thomas
#260
Requests / Re: Sub-mini tube amps
November 03, 2013, 07:40:25 PM
Finally made some better pictures!





cheers
#261
Requests / Re: Sub-mini tube amps
October 30, 2013, 12:01:09 AM
Well, after murder one I tried to build my own tube amp combo...
based on jcm800 amplifier, using russian submini tubes, with PP triodes and LTP PI.
I used Dmitry's power amp schematic, and made a PTP layout using nails as turrets.
The speakers are old oval computer speakers, and I used a big muff tonestack instead of the TMB.
The power supply is the max1771 SMPS, from frequency central projects, and a 12V, 2A wall wart.
I made some videos with my crappy phone cam:


Clean sound

High gain


I think removing the 470pF caps across the grid stoppers would help with a little more low end.
Thomas