Double edge problem! - Jemsite
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post #1 of 3 (permalink) Old 05-16-2004, 08:26 PM Thread Starter
 
Join Date: Dec 2000
Location: Oslo, Norway
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Double edge problem!

Hello!

I've noticed one thing after done the KJG mod to my double edge guitars
(2020/2027) and a friend of mine's 520X.
When balancing in middle position of the "new on/on/on switch", the volume disappeares on every other string. and when swithching the tiny little switch on the circuit board, the opposite strings lose volume.
I looked even closer to the KJG wiring diagram, and found that the yellow wire (marked Y on the circuit board to the combined output)was missing on both my guitars, but no difference after adding that wire.

Anybody knows about this?

Tony
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post #2 of 3 (permalink) Old 05-20-2004, 04:21 PM Thread Starter
 
Join Date: Dec 2000
Location: Oslo, Norway
Posts: 522
Reviews: 1
Nobody knows what I'm talking about?

It's most noticeable when using the split pickups, postition 2 & 4, and it's only when using combined output only.(output 1)

The problem that occur, seems like it's a phasing problem.
And it's only present, when I'm blending both magnetic and piezo.

So if you're done the KJG mod to your guitar, please check it out

Tony
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post #3 of 3 (permalink) Old 05-20-2004, 10:14 PM
 
Join Date: Dec 2000
Location: Virginia, USA
Posts: 363
Quote:
Originally Posted by tony777
it's only when using combined output only.(output 1)
The problem that occur, seems like it's a phasing problem.
And it's only present, when I'm blending both magnetic and piezo.
that's exactly what it is, a phase cancelation between the magnetic signal and the piezo signal when they're run through the same output at the same time. the tiny switch on the circuit board must flipt he phase of the piezo 180 degrees, so it makes the other strings go out of phase.

i don't know of any way to fix this and still run magnetic and piezo through one output at the same time. the system wasn't really designed to do this, and those types of signals are really best suited to different types of amps anyway. if you run the magnetic and piezo through the separate outputs to separate amps, you shouldn't have this problem.

you might could try running the separate outputs into a mixer and mixing them back together, in case the phase issue has something to do with the high impedance signal from the passive magnetic pickups and the low impedance signal from the piezos. if this were the case, boosting the high impedance magnetic signal with a pedal or a mixer input should allow you to mix them back together.
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