[Hallicrafters] SX-100 Bandspread Re-stringing

[Edward B Richards]

Mark; 

Some gears are split with an opening for a compression spring. There is a
tab from each gear going into opposite ends of the spring. The idea is to
keep tension on both sides of the engaged teeth on the mating gear. I
don't know if your radio has this feature. If it does, you might try
putting a stronger spring in it. Over the years the spring looses tension
and things get harder to turn due to dirt, hard grease, etc. Thoroughly
clean and re-lub the moving parts. then do the spring bit. Good luck.

Ed  K6UUZ 

On Sat, 3 Jan 2009 15:40:52 -0500 "Mark Johnson" <mvjohn at sympatico.ca>
writes:
Hello and Happy New Year;

My SX-100 has/had considerable dial backlash, using the bandspread dial, 
when I was tuning the amateur bands. I especially noticed this on CW
signals.

I pulled the front face and re-strung the dial using dial cord. Big
mistake as there was more backlash. At a craft store, yesterday I found
stainless steel, stranded wire used for making beads of all things. Along
with that you can buy these tiny wire clamps that use one set screw
called "scrimps". You can also buy tiny little brass tubes that you
"crimp" but the "scrimps" allow for adjusting. This worked out very well
in that I got a nice tight dial set up but I still have some minor dial
backlash when tuning.

Has anyone else run across this and are there any suggestions for
eliminating the backlash? I have a feeling that by design, there is
always going to be some......

Mark V Johnson VE3DJU/VE3DDI
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