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RE: Amp Knockdown Switches

PostPosted: Fri Dec 30, 2005 2:18 pm
by ricochet
>I found [link:www.runoffgroove.com/ruby.html|this schematic]
>in my travels, but it looks a little simple compared to the
>schematic I've seen for the Epi.

That little mini-amp is going to be in the class of a Honeytone. Nothing's wrong with that, but it is what it is. If you really want to sound like a tube amp, you're going to have to work a little harder. The output transformer of a tube amp is (IMO) a big part of a tube amp's sound, and negative grid tubes when overdriven go into distortion by a different mechanism than junction transistors and op amps. When they're pushed to the max, they both clip about the same, but the transition's going to be very different. You can do that with FETs, but it's going to take a lot of experimentation. The amp makers have all been working on it for 30 years, and we still diss their products for the most part.

You could build a very compact tube head. It's been done.

If I wanted to backpack, though, I'd buy a Roland Mini-Cube and be done with it.

"A cheerful heart is good medicine."

RE: Amp Knockdown Switches

PostPosted: Fri Dec 30, 2005 4:19 pm
by rustyslide
>The amp makers have all been working on it
>for 30 years, and we still diss their products for the most
>part.

Not much dissing here, I love my [link:www.lonelyfridge.com/gallery/main.php?g2_view=core%3ADownloadItem&g2_itemId=1370|FET based Trace Elliot]. I assume that the Tech 21 products are using FETs too, as they claim 100% analog, and there's not much stuff inside the amp (no pictures, unfortunately), unlike the Trace Elliot above.

>You could build a very compact tube head. It's been done.

Like the ZVex ones?

>If I wanted to backpack, though, I'd buy a Roland Mini-Cube
>and be done with it.

My friend who bought the Epi Valve Junior had a Cube-15 (though I've not tried the smaller mini/micro cube), and it was nice, but not a lot better than the little one (a "MEGA VL-10") I have.

Meh, I know what I want, I'm just not sure it exists! curses.

I will do a DIY amp project at some point regardless.

Apologies to the original poster for thread-highjacking.

RE: Amp Knockdown Switches

PostPosted: Fri Dec 30, 2005 6:13 pm
by ricochet
I think that if you can build what you want and do it right, the world will beat a path to your door.

"A cheerful heart is good medicine."

RE: Amp Knockdown Switches

PostPosted: Fri Dec 30, 2005 6:46 pm
by bluesmcgoo
[updated:LAST EDITED ON Dec-30-05 AT 01:47 PM (EST)]Have you heard of these, Rusty?

A lot of good buzz about 'em (not a buzz in the amp, you understand)...Little Lanilei tube amps...

http://www.songworks.com/pages/1/index.htm

I believe the little 1/4 watter is pretty small.

RE: Amp Knockdown Switches

PostPosted: Thu Jan 19, 2006 3:25 am
by rustyslide
>Have you heard of these, Rusty?
>
>A lot of good buzz about 'em (not a buzz in the amp, you
>understand)...Little Lanilei tube amps...
>
>http://www.songworks.com/pages/1/index.htm
>
>I believe the little 1/4 watter is pretty small.

Thanks! those look perfect! I'm going to do some more research when my new guitar gets un-lost.