How to convert a tube amp schem to solid state?

[suryabeep]

Hi all,
I'm interested in converting this schematic (http://www.blueguitar.org/new/schem/sovtek/mig-50.pdf) to a solid state stompbox so I could use it as a pedal, sorta like all those amp-in-a-box pedals. Is this possible? I don't know anything about this at all, so any input would be appreciated.
Thanks!

[rankot]

It's quite usual preamp with common cathode input (http://www.aikenamps.com/index.php/designing-common-cathode-triode-amplifiers), followed by something similar, which I don't know how to call, but can be easily reproduced with two JFETs. You can build something similar using circuits from Run Off The Groove http://www.runoffgroove.com/fetzervalve.html, for example. But if you want that same sound, you will have to build it with tubes.

[tonyharker]

Instead of converting to solid state, why not use sub-miniature tubes instead with a nixie type voltage booster supply for the B+.
Turn a few heads on stage.

Tony.

[Danich_ivanov]

Recently i did a jfet version of the gretch 6150 (i believe it was). It was quite convincing. The only thing i had to change were resistors that go from drain to power, i found that 10/1 ratio works quite well, so for example if you have 100k, then you just replace it with 10k, as for everything else i just imagined if tubes were jfets, and left it all in it's place. What i didn't do was power amplifier, since i only needed a preamp, so can't say much about that.

But since you want to only use it as a pedal, you don't need power amp. You can probably stop where the tone control ends, and add some sort of a buffer after it.

[thermionix]

Looking at the schematic, it's only a very slight variation of the tweed Bassman/50W plexi Marshall.  There are a bunch of pedal circuits out there already that attempt to emulate the plexi sound, I have no experience with them myself.

[J0K3RX]

Google marvel drive or...

Do a search here
http://www.diystompboxes.com/smfforum/index.php?topic=115000.msg1067819#msg1067819

[Juan Wayne]

I second Rankot's suggestion about checking out runoffgroove. I've had a variant of The English Channel for many years and, while it doesn't match my AC30, it does a great job at giving you that british flavour. Don't even dream of using batteries though, the biasing is very sensitive on most of those amp sims.

[TejfolvonDanone]

It's quite usual preamp with common cathode input (http://www.aikenamps.com/index.php/designing-common-cathode-triode-amplifiers), followed by something similar, which I don't know how to call, but can be easily reproduced with two JFETs. You can build something similar using circuits from Run Off The Groove http://www.runoffgroove.com/fetzervalve.html, for example. But if you want that same sound, you will have to build it with tubes.

It is a common cathode gain stage and a DC coupled cathode follower. You can read on the effect and design of it: http://www.valvewizard.co.uk/dccf.html.

[printer2]

The most convincing conversion,

https://www.ssguitar.com/index.php?topic=2006.msg15734#msg15734