New Express build
Moderators: pompeiisneaks, Colossal
New Express build
Fresh Express build with some help from rooster and RJ.
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Re: New Express build
Nice! Does that circuit board have traces on the bottom side? Or did you run wires underneath?
Mike
Mike
Re: New Express build
Nice work, good cab too. I wish I knew anything about building a cab.
Yours Sincerely
Mark Abbott
Mark Abbott
Re: New Express build
The board and the cab both came from RJ. I ran wires under the board. The cab is the eco from his sight. Its plywood, but with some wood filler and some sanding it looks good for a few feet away uncovered. Some day I'll build a nice hardwood cab for her.
This also has one of the newer JM trainwreck features, no bright switch just a bright cap 100pf. Done this way to make the amp more stable.
This also has one of the newer JM trainwreck features, no bright switch just a bright cap 100pf. Done this way to make the amp more stable.
Re: New Express build
Doesn't the JM amps also use circuit Dana and Richie came up with?
Yours Sincerely
Mark Abbott
Mark Abbott
Re: New Express build
I had a look and Dana and Richie came up with VVR3, they are supposed to be the best design out there, but sadly they don't make them anymore. It was a good thing while it lasted.
Yours Sincerely
Mark Abbott
Mark Abbott
Re: New Express build
I know the one that Ken built for JM had a built in attenuator. I do not know if it is an airbrake in the same chassis or if it is some sort of VVR.
Re: New Express build
I suspect it has to be something like the VVR3 because the Airbrake's resistors are quite large.
Yours Sincerely
Mark Abbott
Mark Abbott
Re: New Express build
its located on the left side(looking from the rear) I believe there would be enough room above the weather stripped area to do an airbrake there. JM's Ken built amp is from 1985 IRC so I doubt it would be a VVR type setup.
also has a slave out like Kens airbrake did.
also has a slave out like Kens airbrake did.
Re: New Express build
I see. Have you built an Airbrake, if so how well do they work?
Yours Sincerely
Mark Abbott
Mark Abbott
Re: New Express build
No, I have not that is next up after a few more circuit tweaks, including an el34/6v6 bias switch and triode pentode switch(1/2 power switch)
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Re: New Express build
Nice build... thanks for posting that up for us to get a look at.
Building in an attenuator is not too difficult and has turned out to be one of the cooler features I've added to a Wreck. I use an internal rheostat but have the load resistors on the outside of the chassis.
Yes, that is a reverse image build and not a digital flip.
Check with Lou Rossi here on the forum about VVR boards...
Building in an attenuator is not too difficult and has turned out to be one of the cooler features I've added to a Wreck. I use an internal rheostat but have the load resistors on the outside of the chassis.
Yes, that is a reverse image build and not a digital flip.
Check with Lou Rossi here on the forum about VVR boards...
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Re: New Express build
I saw that build and that and JM's original wreck gave me the idea, also I'm the one whos been emailing you about the 18watt transformerRJ Guitars wrote: ↑Thu Aug 17, 2017 1:25 pm Nice build... thanks for posting that up for us to get a look at.
Building in an attenuator is not too difficult and has turned out to be one of the cooler features I've added to a Wreck. I use an internal rheostat but have the load resistors on the outside of the chassis.
Yes, that is a reverse image build and not a digital flip.
Check with Lou Rossi here on the forum about VVR boards...