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Dwell control for Long decay reverb tank

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pmallory

Post subject: Dwell control for Long decay reverb tank

Posted: Sun Jan 29, 2012 5:31 pm

Joined: Fri Dec 30, 2011 2:38 pm
Posts: 8
Location: HINCKLEY UK

ANOTHER REVERB QUESTION!

My son wants me to fit the long decay reverb tank as used in the fender standalone 5G/6G15 reverb. I've read that to use this tank the reverb needs a " Dwell control " as the fender stand alone reverb, this uses a 250k pot to bleed of some of the signal between the 1st and 2nd triodes of the 12AT7 reverb " pre-amp" tube if/as required to stop the reverb getting over excited.
Could this be done on Kurtlives scheme by fitting say a 500k pot in series with R3 and reducing R3 to 500k.
Or would this not be necesary with this 1 tube design - the reverb tank won't be getting hit with the output of a 6K6GT after all!

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File comment: 6G15 dwell control circuit

Dwell Circuit.jpg [ 31.21 KiB | Viewed 5152 times ]

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kurtlives

Post subject: Re: Dwell control for Long decay reverb tank

Posted: Sun Jan 29, 2012 6:05 pm

Expert

Joined: Sun Feb 17, 2008 4:47 pm
Posts: 960
Location: Toronto, Canada.

Try the dwell control out, it may prove very useful on the big long decay 3 spring tank. Maybe try the mod out before drilling a hole for the control.

I attached a very rough drawing to help you out. Very simple mod!

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Reverb Dwell Mod.png [ 56.7 KiB | Viewed 5146 times ]

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