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#51 2013-08-26 18:38:09

Liquids
Member
From: CT
Registered: 2010-08-01
Posts: 491

Re: Tone circuit upgrade Mod for V-4s (And other Ampeg amplifiers)

It's available in the schematics section, and it's virtually the same for all ampeg tone stacks - the mid control is a different part of the circuit in every ampeg schematic I've seen, if I'm not mistaken.


Matthew

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#52 2013-08-27 06:29:34

MarkusBass
New member
Registered: 2013-08-26
Posts: 2

Re: Tone circuit upgrade Mod for V-4s (And other Ampeg amplifiers)

Thanks for the info but I still cannot find it. There are several schematics there but none of them contains component values for the tone stack section. Some links display only a placeholder (for JPG files). Is it only on my computer?
Can you post a direct link to the file that contains the values?

Mark

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#53 2013-08-27 19:23:35

Liquids
Member
From: CT
Registered: 2010-08-01
Posts: 491

Re: Tone circuit upgrade Mod for V-4s (And other Ampeg amplifiers)

Oh yeah...sorry...forgot about that. 

I can't find it easily due to some restrictions right now, but I have an image file with it and I will PM it to you.  Hopefully someone can locate a stable link for others...right now I can't even view the photos in this thread so for all I know it's above in an image...


Matthew

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#54 2013-08-28 03:09:23

hangman
Banned
From: Seattle Washington
Registered: 2006-09-04
Posts: 1848

Re: Tone circuit upgrade Mod for V-4s (And other Ampeg amplifiers)

My photos are and have been down.   They will be up again soon. 

If anyone needs the photos just send me an email or private message.

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#55 2013-09-06 11:34:12

Dan56
Member
From: RI
Registered: 2012-09-02
Posts: 37

Re: Tone circuit upgrade Mod for V-4s (And other Ampeg amplifiers)

I have posted video of the work to do this rebuild.  This video: http://youtu.be/YIxtxT6YDDU  shows the circuit board removed and before the componates are replace and then after replacing the componates.

This video: http://youtu.be/tBWAoVlXlYg  is the sound samples before and after the rebuild.  I spend a few minutes talking about this rebuild so the sound samples do not start until 3:29.  I constructed the video so that each control is heard before and after back to back.  There is no fancy playing.  Just strumming the open strings while moving the dials through their ranges one at a time.

I have made no comment in the video as to the outcome.  I did not want to bias any viewers.  I have tried to keep all the parameters of the sampling the same for the pre and post tests.

I have linked to this thread and noted that all credit for this idea goes to Steve.

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#56 2013-09-11 00:51:11

Liquids
Member
From: CT
Registered: 2010-08-01
Posts: 491

Re: Tone circuit upgrade Mod for V-4s (And other Ampeg amplifiers)

That was actually surprisingly cool...thanks!


Matthew

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