Stacked pot question

Started by Gaustu, January 06, 2014, 08:39:33 AM

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Gaustu

Parker PDF85 modified: Sustainiac, SD TB-4, Piezo Hexpander 13 pin out.
GR-55 mod with 13 din thru, 6 analog outputs D-Sub => Presonus FS Mobile  8 analog inputs.
NI Reactor matchHEX Guitar Framer Ensemble custom.

Elantric

#1
Its important to know what control functions you are trying to implement with your stacked pot

I assume Normal Guitar volume and GK-3 "GK Vol" ?


GK-VOL must be 50K ohm (Linear taper) pot

Normal guitar volume:
*  Fender Strat =   250k ohm (log  / audio taper) pot
*  Fender Tele =   1Meg ohm (log  / audio taper) pot
*  Gibson pre 1971 = 500k ohm (log  / audio taper) pot


In the old days we did this with Allen Bradley Mod Pots  - custom order what value / taper you prefer in top or bottom pot position.
(see the one in black rectangle  - this accepts the Fender '62 JazzBass style stacked knobs)

Find the latest source for these here:
http://www.potentiometers.com/series70.cfm

http://www.potentiometers.com/
Catalog is here:
http://www.potentiometers.com/pdf/catalog70.pdf

kenact

Hi Gaustu,

If you're talking about the physical size of the shafts, there's no way to know from the listing because the seller didn't include the dimensions.

If the resistance and taper are right for your application, contact the seller and ask about the dimensions of the shafts.
Godin Session & Montreal FTP, LGXT, LGX SA, Redline, ACS, A12, A11, A10, A4
Danoblaster Baritone w/GK-3
Gretsch Nashville, Viking
Fender Strats
Fret King Supermatic
Larrivee DV03RE
Parker Midi Fly
Seagull, S&P 12
VOX Phantom XII
GR-55, 33, 30, 20, GI-20, RC-50, US-20, VG-99, VP-7
Sentient 6
Cyr 7

Gaustu

#3
oh yes, I didn't pointed.
I mean about physical sizes only!

Btw I have installed 250k linear pot that works perfectly as GK VOl.



Parker PDF85 modified: Sustainiac, SD TB-4, Piezo Hexpander 13 pin out.
GR-55 mod with 13 din thru, 6 analog outputs D-Sub => Presonus FS Mobile  8 analog inputs.
NI Reactor matchHEX Guitar Framer Ensemble custom.

Elantric

#4
QuoteBtw I have installed 250k linear pot that works perfectly as GK VOl.

Good to know - the important criteria here is Linear Taper for GK-VOL.

But I hate using Linear Taper pots for normal passive Guitar. Gibson often uses 300K Linear Taper on guitars made after 1971 - i hate them!
Back in 1974, the first thing i did with my new '73 LP Standard was swap the pots for 500k Audio Taper all around.
http://forum.gibson.com/index.php?/topic/61087-why-300k-linear/

Gaustu

yes, this is for a fast reaction of the volume changes but for me this is not good too
Parker PDF85 modified: Sustainiac, SD TB-4, Piezo Hexpander 13 pin out.
GR-55 mod with 13 din thru, 6 analog outputs D-Sub => Presonus FS Mobile  8 analog inputs.
NI Reactor matchHEX Guitar Framer Ensemble custom.