HH guitar combo, 2*12" schematic - diyAudio
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Old 7th August 2011, 05:53 PM   #1
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Default HH guitar combo, 2*12" schematic

This vintage (model IC100L, or 212, or V-S MUSICIAN, or all ?) solid state combo amp is one of the best sounding guitar amps what I ever heard, with rich creamy sound and powerful.

I found some schematic, but is not clear which model, I am not sure. There I saw some specific chip used for simulation of "valve sound": V-S MUSICIAN Tone correction module AS00015/A. That is IC, or just module with separated PCB?

If this is the module with PCB, please if some of you have a schematic?

Also whether is this schematic of amp about I talk? If its not, please I need right complete schematic.

Thanks in forward!
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File Type: jpg HHVSMusicianamplifier1of2.jpg (150.4 KB, 239 views)
File Type: jpg HHVSMusicianamplifier2of2.jpg (152.1 KB, 213 views)
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Old 22nd October 2013, 08:19 PM   #2
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You have all the schematic of the VS-Musician lead guitar amp. The Tone correction module was sealed and the circuit was never published.

These were incredibly loud amps although only rated at 80 watts into. 8 ohm and 100 watts into 4 ohm. More details are available from 74 Series, Other Transistor items in MAJ Electronic store on eBay!.
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Old 22nd October 2013, 10:42 PM   #3
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Sorry that was an error and I have only just noticed it. The real link is http://www.majelectronic.co.uk

Last edited by chienmort; 22nd October 2013 at 10:47 PM.
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Old 1st November 2013, 12:26 AM   #4
JMFahey is offline JMFahey  Argentina
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The VS circuit was degooped, traced and published.
Basically a FET gain/clipping stage and some fixed EQ built in.
Not bad sounding at all.
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Old 1st November 2013, 02:28 AM   #5
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Default VS Circuit

Any idea where the VS circuit was published?

Thanks,

Sam
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Old 1st November 2013, 09:38 AM   #6
JMFahey is offline JMFahey  Argentina
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Even better:
HH00015Aschematic-1.jpg

But as I said, nothing too weird, just a simple FET gain stage.
One trick is that they feed it with meager 10V, single supply, so it clips earlier, they limit its headroom this way.

Gallien Krueger Bass amps have something very similar, they call it GIVE (Gate Induced Valve Effect).

Not too different from what an overdriven12AX7 would do.
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Old 1st November 2013, 11:19 AM   #7
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Thanks for posting the schematic.

sam
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