[HAM] Hum in c-3/leslie 147

[pete mazich]

>you wrote:
>
>I am looking for experienced troubleshooting here.
>
>My C-3 #67135 and 147 leslie has a hum when keys are contacted(played)
>I noticed it months ago but seems to be getting worse.
>
>Also seem to hear "leakage", based on others description of such an event.
>
>Am lookiing for some low cost solutions to try before getting into 
>cap or preamp rebuild, etc .

figjams-

Check and make sure all the screws on the preset panel are tight and 
that the wires are not touching each other.  Also, check the ground 
connections on the TG terminal strip (facing the back of the organ 
they are on your right at the very end); better yet, drill a hole in 
the TG cover (brass) near the ground terminals of the TG, screw in a 
lug terminal w/ a #10 machine screw and relocate all the grounds 
there (this will involve lifting up the manuals to gain access to the 
TG cover).  To re-check the level of hum, turn on the organ (just the 
run switch), pull out some drawbars, and press some of the keys; this 
should tell you where you're at hum-wise.  The leakage and/or rumble 
can be eliminated somewhat more, but that's a little more involved 
(still cost effective tho').  Let us all know how this turns out...



pete