[Boatanchors] Reply to Glen Zooks post about Heath LMO warbling
pettit at ti.com
Wed Feb 15 06:57:46 EST 2012
My Heath SB-300 had been warbling for about a year now but once I read
Glen's dissertation on how to correct the problem, it gave me the
incentive to start removing screws and nuts.
I did not remove the front panel, but the LMO came out with just a
little "wiggling" and keeping my fingers crossed. Inside there was a
small amount of dried lube, easily removed per Glen's instructions.
WD-40 works wonders! The braid came from some small diameter coax but I
needed my 150 watt soldering gun to overcome the thermal mass of the
large gear and the capacitor frame.
While re-installing the LMO and main dial, the little point on the
plastic part that moves the 100 kHz dial broke off. Some quick thinking
and ingenuity provided the answer. I drilled a 1/16" hole in the
plastic part and glued in a short section of 1/16" carbon fiber rod that
was super glued into place. A bit of trimming with a cut-off wheel on
my Dremel tool and the point fit into the slot perfectly.
Everything else went back together and final alignment was a piece of
cake. The fold-outs in the manual helped a lot along with the assembly
steps. When in doubt, RTFM!
Thanks to Glen for the post. My SB-300 now tunes smooth as silk with
Dick Pettit WA2ROC
Design Lab Manager
Texas Instruments Cary
1000 CentreGreen Way
Cary, NC 27513
"Marriage is natures way of keeping us from fighting with strangers."
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