If you bought it from virtually any guitar parts supplier, you bought a PAN pot (used in mixers for panning a signal from one channel, to both, to the other, at equal total loudness), which will be disappointing in that it will not BLEND two pickups together (one it full-on while the other is gradually blended out).
Even a PAN pot that is 250K will have 40K Ohms of resistance from each pickup to the common output node when in the center detent position. One could use a 25K PAN pot (where the resistance will be about 4K, but this is still too much and the blended out extreme positions will only have 25K for less than meaningful results.
In order to realize the true interaction between two pickups, they have to be connected with none to little resistance. In order to eliminate the interaction between two pickups, they have to be isolated with at least 100K resistance
Why couldn't you get the rotary switch to work? (we do have some experience with them here........)
I bought it from ebay: The description: "One 500k mini electric gutiar control pot. Audio, for blend control from one source to second source - both full at the centre click" It describes what I want but I guess we'll see when it gets here.
Thanks for the diagrams...donno how I overlooked that one when I was looking through those diagrams.
There isn't enough room to get the rotary in well. Its an incredibly tight squeeze...I could get it in but it developed a new problem every time I got it in. The most recent problem was a completely anemic sounding bridge pickup that I just couldn't get fixed.
Last Edit: Feb 12, 2008 21:33:25 GMT -5 by chriscrob
chriscrob .... ihave a 3-way rotary pot that i took out of a 2-pup squier strat that has a control cavity like a tele & should fit in your guitar. its not a blend pot but has 3 clicks ... neck both or bridge & worked fine before i changed it out. you are welcome to it if youre interested PM me with your adress & ill mail it to you
Sounds like you know more about this guitar than I do . Ive never seen one before , but it plays & feels great . Its about to undergo major cosmetic surgery , judging by the quality of some of the parts[ like the nut & frisbee ....er pickguard ] I dont think Im hurting a future vintage collectors piece. Anyway more on that later & Ill be sure to post before & after pics.
You were right (why don't I read stuff before I buy...).
The volume is actually lowest at the center detent. Ghai.
I've still got some serious problems with my bridge pickup. I think I'm just going to buy a new one. Its considerably quieter (not just a little bit) than my neck pickup...even when its panned all the way to the bridge.
I have a rio grande tall boy in the neck and a fender texmex in the bridge...the guy i bought them from (i trust him) said they mixed well. I think it was either damaged coming out of his guitar or going into mine.
Just read the first few sentences. Plug a cord into the output jack on the guitar, select each pickup separately, set the volume to full-up, and measure the resistance at the other (un)plug(ged) end of the cord.
The one bad thing about autoranging is it doesn't let me know what units I'm dealing in which i guess is fine for this application but annoying for general learning. (I finally broke down and bought a multimeter...i've been meaning to pick one up for a long time)
On an auto-ranging meter, there is usually a range/range lock button that will keep the units consistent.
I can't tell what your numbers mean. 6.6 K Ohms is a good value for a neck pickup, probably.
Bridge = 131.6 K is just wrong if it's K Ohms. Bridge = 13.16 K is probably too high for a Fender Tex-Mex. It should probably be around 7 K Ohms. Reviews on harmonycentral indicate around 7K.
Center = 126.5 (?) seems to indicate that the bridge of 131.6 (?) is in parallel with 3,264.2 (?) of the same unknown range of units. This means nothing to me.
If the bridge pickup was open, I would expect that both the neck and middle selections would read the same.
Check the manual. Look for the units indicator on the LCD display.
Oh, wait a minute. You have the pan pot in there, don't you?
The above would apply to a guitar without one. I'll leave it in the post for those therewith.
Due to your indication that the volume is actually lowest at the center detent, I suspect that you have some additional wiring issues. I believe that you need to measure the resistance of each pickup directly, without the involvement of any other circuitry to determine their conditions, and then we can proceed with a wiring analysis.