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Joe Pass Master Volume

#1 User is offline   shartom 

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Posted 13 July 2008 - 03:35 AM

Has any added a master volume control to their Joe Pass? The guitar has a couple of sweet spots that can be dialed in with the two volume controls. Unfortunately when you want to up the volume, there go settings.
I would think a 500k pot should work. The top is not that thick so that a regular pot should fit. My favourite music store has the matching knob. I don't see a problem with the wiring.
It could be mounted on the lower bout similar to the Gretsch's.
I don't think I've ever seen a master volume on either an Epiphone or Gibby.
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#2 User is offline   dubstar 

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Posted 13 July 2008 - 03:59 AM

the alleykat, flamekat, wildkat, and zephyr blues deluxe all have a master volume...I think
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#3 User is offline   shartom 

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Posted 13 July 2008 - 04:13 AM

You are right. I looked through the product listing and a couple did have master volume pots. Probably didn't notice these as I have two "Cats" at home and I don't need any more.
Thanks
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#4 User is offline   iansmitchell 

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Posted 13 July 2008 - 04:29 AM

alleykats and wildkats I know have MV.
I think a low impedance(1 MEG) pot might be in order for better control, more volume, and less brightness rolloff.
... Please do not insinuate anything sexual from that.
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#5 User is offline   carverman 

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Posted 13 July 2008 - 09:36 AM

Quote

Has any added a master volume control to their Joe Pass? The guitar has a couple of sweet spots that can be dialed in with the two volume controls. Unfortunately when you want to up the volume, there go settings.
I would think a 500k pot should work. The top is not that thick so that a regular pot should fit. My favourite music store has the matching knob. I don't see a problem with the wiring.
It could be mounted on the lower bout similar to the Gretsch's.
I don't think I've ever seen a master volume on either an Epiphone or Gibby.



Yes, it should be possible. The top is about 3/16 inch thick and a short shaft will
just poke through enough to get the washer and nut on. As far as the wiring
goes, you would need to get a Gretsch wiring diagram.

( I was going to do that originally with my custom LP semi-acoustic and put it in
the florentine, but now I need that space for the t-bridge tone control. )
=======================================================
2005 Epi LP Custom
1995 Epi Joe Pass
2006 Epi Broadway Elitist
and some other guitars
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#6 User is offline   shartom 

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Posted 13 July 2008 - 01:58 PM

I think I will rig up a pot that can be plugged into the output jack to get the best value. As far as internal wiring goes, I'll run the lead that goes to the ouput jack to the pot and then wire the pot to the output jack. I've experimented using an Ernie Ball volume pedal, and this mod should duplicate the process inside of the guitar.
I had a Gretsch 6120 that had the master volume and it worked like a charm.
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#7 User is offline   carverman 

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Posted 13 July 2008 - 04:55 PM

Quote

I think I will rig up a pot that can be plugged into the output jack to get the best value. As far as internal wiring goes, I'll run the lead that goes to the ouput jack to the pot and then wire the pot to the output jack. I've experimented using an Ernie Ball volume pedal, and this mod should duplicate the process inside of the guitar.
I had a Gretsch 6120 that had the master volume and it worked like a charm.


The official Gr*tsch web site has a few simple easy to follow wiring diagrams. On the 6122, the neck p_up
goes to the 3 way and the output of the 3 way goes to the Master vol (500k) and master tone (500k) with
a .022 uf cap and then to the jack.

On the 6120 they use a 500k volume on the neck which then goes to the 3 way and similarily with the
bridge. The o/p of the 3 way goes to a master 500K volume and the jack. The 6120 uses a Master tone
switch which appears to have more leafs than a 3 way to switch a .01 and a .039 cap, so I'm not sure
if the 500k tone pots would interfere with the master volume, but I can't see how. Certainly it would
give you independent controls on both p_ups that then are volume controlled to your preference on
the o/p.
=======================================================
2005 Epi LP Custom
1995 Epi Joe Pass
2006 Epi Broadway Elitist
and some other guitars
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#8 User is offline   dbirchett 

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Posted 13 July 2008 - 06:20 PM

Maybe better than Gretsch would be Guild wiring diagrams. Many of the Guild guitars came with master volumes. Look for an Starfire V or VI or an X-500. The components would be closer than with the Gretsch.
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#9 User is offline   dbirchett 

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Posted 13 July 2008 - 06:36 PM

Here is the Guild X-500 Wiring diagram:

http://www.guildguit...grams/X-500.pdf
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#10 User is offline   Parabar 

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Posted 14 July 2008 - 03:00 PM

Sez dubstar:

Quote

the alleykat, flamekat, wildkat, and zephyr blues deluxe all have a master volume...I think


The Zephyr Blues Deluxe has only three individual volume controls for each pickup and a master TONE.
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#11 User is offline   RotcanX 

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Posted 14 July 2008 - 04:39 PM

[quote name='shartom]As far as internal wiring goes' date=' I'll run the lead that goes to the ouput jack to the pot and then wire the pot to the output jack.[/quote']
That's exactly right. A 500K Linear pot will do the trick; 1 Meg will be overkill, but you could also try a 300K.
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#12 User is offline   shartom 

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Posted 15 July 2008 - 01:40 PM

Thanks for all of your input and tips. I used my Joe Pass on two gigs today, This afternoon playing the blues and tonight playing country rock. I actually got a request to play Buckeroo...on a Joe Pass. I have it set up nicely and am using Gibson 10-46 strings, through a Blues Deluxe.
Im going to tackle the mod tomorrow. I have to play all weekend. It sounds great at this point. The master volume will be a great addition.
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#13 User is offline   shartom 

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Posted 20 July 2008 - 04:36 AM

Finally got into the project. I used an inspection mirror to check out the wiring. The wires from the output jack are part of a multi conductor cable. I pulled the neck pickup. They barely left enough slack to get the pickup out. I could see the jack lead at the switch. My options are few. I can disconnect the lead at the switxh, splice in a piece of shielded cable and run it to the new pot. As of this writing, no holes have been drilled. I could then wire the other side of the the pot to the switch, again using shielded cable. The jack lead to the switch is pretty thin. I am not a big fan of splices, but there doesn,t seem to be an alternative. While the guitar was apart, I got a call for a gig. Put it back together.
I'm going think about this for a while. I wouldn't even attempt to rewire my Sheraton and I ran my own shop for 10 years.
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