Sub-mini tube amps

[thomasha]

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

[thomasha]

Finally made some better pictures!





cheers

[jubal81]

That is outstanding! I want one!

[jkokura]

Love it! How loud does it get?

Jacob

[juansolo]

AWESOME 

[billstein]

NEEEEEEED

[Ettore_M]

Awesome! I want to build something like this! 
Is this a full-tube amp? Does it have an output transformer?

Hector

[thomasha]

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

[thomasha]

Well, another one!
now a superfly in a 1590a!





Greetings
Thomas

[aballen]

Ok is anyone making a board for this?   I have a firefly, but I would love to build something smaller

[thomasha]

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.

[culturejam]

I was working with Rick on a PCB for the Murder One, but we never finished the project. I actually wanted to split it into two boards and have the charge pump and power tube on one board and the preamp on another. I think I might have finished the power board, but I can't remember. I just thought more people would find the modular approach useful.

[Leevibe]

Well, another one!
now a superfly in a 1590a!

Greetings
Thomas

Wow Thomas. That is a tight build man! Good job.

I was working with Rick on a PCB for the Murder One, but we never finished the project. I actually wanted to split it into two boards and have the charge pump and power tube on one board and the preamp on another. I think I might have finished the power board, but I can't remember. I just thought more people would find the modular approach useful.

I agree. I've thought about the same thing for a murder one 

[thomasha]

Hi, here comes the sound sample!

Cheers, Thomas

[jubal81]

Sounds great and I get the impression it's more than enough for jamming at home. Really great job.