DeArmond 610 pedal

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DeArmond 610 pedal

Postby RogerCook » Sat Mar 04, 2017 1:54 pm

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
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Re: DeArmond 610 pedal

Postby JimN » Sat Mar 04, 2017 2:01 pm

What circuit diagram do you have, Roger?

I'll tell you now that the dual-gang pot is virtually impossible to replace.
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Re: DeArmond 610 pedal

Postby RogerCook » Sat Mar 04, 2017 2:13 pm

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.
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Re: DeArmond 610 pedal

Postby JimN » Sat Mar 04, 2017 3:31 pm

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
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Re: DeArmond 610 pedal

Postby RogerCook » Sat Mar 04, 2017 4:16 pm

£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.
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Re: DeArmond 610 pedal

Postby rogera » Sat Mar 04, 2017 6:09 pm

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.
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Re: DeArmond 610 pedal

Postby RogerCook » Sat Mar 04, 2017 6:43 pm

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).

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