MV abrupt taper change

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glasman
Posts: 1446
Joined: Wed Jan 19, 2005 10:37 pm
Location: Afton, MN (St Croix River Valley)
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Re: MV abrupt taper change

Post by glasman »

greiswig wrote:I got to thinking: I've got a carcass of an old Twin. Looked in there, and sure enough there's a 1M pot in there. So I pulled it and measured it, and it sure acts like 30%. So I put it in my D'Lite.

It definitely gets rowdy earlier in the taper! But there is now no point in the sweep where it suddenly just takes off.

Here's the other thing: I swear it changed the sound some. The amp sounds like it got stronger in the bass, and feeds back more easily. Probably just my imagination, though: my brain keeps telling me that a pot at any point in the sweep is just a pair of resistors in series with a tap between them, so this change shouldn't change the sound.

Where do you think HAD got a lot of his pots :). Old fenders...
Located in the St Croix River Valley- Afton, MN
About 5 miles south of I-94
aka K0GWA, K0 Glas Werks Amplification

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vibratoking
Posts: 2640
Joined: Tue Nov 10, 2009 9:55 pm
Location: Colorado Springs, CO

Re: MV abrupt taper change

Post by vibratoking »

greiswig wrote: I got to thinking: I've got a carcass of an old Twin. Looked in there, and sure enough there's a 1M pot in there. So I pulled it and measured it, and it sure acts like 30%. So I put it in my D'Lite.

It definitely gets rowdy earlier in the taper! But there is now no point in the sweep where it suddenly just takes off.
I suspect that the 30% taper caused the volume change to move earlier in the taper.

I also suspect that the sweep suddenly taking off is due to the dual element 'hockey' stick composition of the first pot and that the Fender pot has a single element true log taper. Those two effects are different.
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