New build ultimate dumble-based amp (2)

Dumble schematics, designs, pictures. Only members may post files here.

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azatplayer
Posts: 551
Joined: Thu Feb 26, 2009 7:59 pm
Location: Great Southland

Re: New build ultimate dumble-based amp (2)

Post by azatplayer » Mon Dec 26, 2011 2:29 pm

Whoaa, too cool!

noworrybeefcurry
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Joined: Fri May 20, 2011 9:50 pm

Re: New build ultimate dumble-based amp (2)

Post by noworrybeefcurry » Tue Dec 27, 2011 12:10 am

That truly is impressive!!! Any chance of a schematic?

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M Fowler
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Location: Moorhead MN

Re: New build ultimate dumble-based amp (2)

Post by M Fowler » Tue Dec 27, 2011 12:35 am


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fjonkman
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Joined: Fri Sep 09, 2011 2:57 pm
Location: Netherlands, Rosmalen

Re: New build ultimate dumble-based amp (2)

Post by fjonkman » Thu Feb 09, 2012 10:38 am

martin manning wrote:Thanks for the additional details, fjonkman. The D tone stack is quite effective and is correct as drawn in the schematics and layouts posted here. That can be verified, at least in the case of the Skyliner version as implemented on #124, using the detailed photos. The R-J switch definitely has an effect, but the PAB will be reduced as the other EQ controls approach full-on. Re using the heater winding for relay power, I guess it can be done then- unregulated, even... There were reports that doing so caused hum issues, but I can't imagine why. Really great work, and thanks for posting the detailed documentation!
Martin
You are right on the D tone stack. I changed my scheme as it has to be. Here the result.
I don't have any sound files yet, because I don't have a decent setup. Maybe later.
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diagrammatiks
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Re: New build ultimate dumble-based amp (2)

Post by diagrammatiks » Fri May 18, 2012 5:02 am

this is excellent.

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tubelectron
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Location: France

Re: New build ultimate dumble-based amp (2)

Post by tubelectron » Sun May 17, 2015 2:52 pm

Three years later :wink:

Yes fjonkman, it is a fine job for a full featured amp, inspiring me...

A+!
If it works, don't fix it...
www.guilhemamplification.jimdo.com

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