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I'm looking for some info on the DeArmond 610 volume/tone pedal.

I know the tone section used a dual gang pot with 250k and 500k tracks on the same spindle. The circuit I have shows these as linear tracks but I've read somewhere on the internet that these were actually log/antilog (can't find it now though). What I need to know is which was which - ie was the 500k track log or antilog and the same for the 250k one.

Any help gratefully received!

Roger

What circuit diagram do you have, Roger?

I'll tell you now that the dual-gang pot is virtually impossible to replace.

Thanks Jim.

Essentially the circuit I have is the same as this one but with component values showing the pots as 500k and 250k:

http://www.tdpri.com/threads/dearmond-6 ... lp.530094/

My plan is to cannibalise 2 pots to make one correct one (I've already done this with linear tracks) though I think Omeg may be able to produce the correct pot (electronically if not cosmetically) subject to a minimum order of 3.

By the way, this is not for a real DeArmond pedal, but a modified Fender one.

Roger: How much have you been quoted for three of the dual-ganged pots?

I might like to tag along on that and order another few as spares.

There was a long thread which dealt with this some years ago:

http://www.shadowmusic.co.uk/viewtopic.php?f=21&t=11321&start=120

£5.95 each + £5 delivery + VAT. I need to be sure about the curves first though. The linear one does work but leaves approx half the track resistance in circuit in the centre position, hence a noticeable volume drop, and less resistance at the extremities of travel than the log/antilog set up would have, so less effect.

The Dearmond 610 is a passive devise so there is a slight drop in volume but simply turning up your amp volume control to compensate gets around that.
The 500k and 250k pots in the 610 are linear.

Thanks Rogera. That will make things a easier. I'm also intending to install a switch so I can switch out the tone section when I don't need it (clumsy feet!) and to include some active circuitry to boost the volume level and to buffer the volume pot (when switched to volume only mode).

Roger