[HAM] Stuck note

Dave Bishop xxcaptinxx at comcast.net
Wed Jan 23 20:59:27 CST 2008


> I'm curious: why would that make any difference?

Here's what I was thinking:

In my (limited) experience its more likely that something has lodged in the 
keystack permanently shorting a contact or contacts, or dentrites under the 
keyboard.  When the palladium wire is cut through, its often at more than 
one place.  By limiting the symptom to the lower manual we eliminate 
potential problems from the percussion circuit.  If it appears on only one 
set of drawbars, we know its not localized to just a keyboard bussbar.  If 
he hears a D when he plays an E key there could be a short in the TWG wiring 
or maybe a magnetized tonebar.

By identifying which drawbar needs to be pulled out to make the sound I 
might be able to make some guesses which keystack is involved, and by 
identifying which tonewheel/coil/tonebar is involved, I might know where to 
look for shorted wires.  If I knew where along the keystack/bussbar 
interface the short is I might be able to advise how to view the area before 
removng the bussbars and which of the nine is the one involved:  If it is 
the palladium wire that is jacked up, it might take out adjacent contacts 
with it when its removed, making things worse.

Regards,

Dave Bishop 



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