[Hallicrafters] SX-111 RF Alignment

[wb8jkr at juno.com]

 I've had good luck heating the coil form with
a hair dryer.

Mark  WB8JKR


On Fri, 31 Dec 2004 09:11:24 -0500 Bill Gerhold <k2wh at optonline.net>
writes:
> I have decided to re-do the alignment on my SX-111 due to various 
> problems
> with receiving.
> 
> The alignment includes adjustments to various coils in the front end 
> prior
> to the 1st RF amp.  Some of these are way out of resonance and need 
> to be
> adjusted.  For instance, the 10 meter band is resonant at 25mhz.  
> The 15
> meter band is resonant at 19mhz etc.  I am trying to get a match to 
> the
> first RF stage to improve the sensitivity.  And yes this mismatch is 
> there
> even when adjusting the trimmer cap on the front panel 360 degrees.
> 
> I have tried to adjust these coils front end coils, but the cores 
> will not
> turn.  Apparently they are either glued or cemented in place (I 
> think).  I
> would like to free these up so I can adjust them.  Does anyone know 
> how to
> free up the cores in these front end coils?  Would a drop of solvent 
> or
> WD-40 damage the form?  Were these cores cemented in place at the 
> factory?
> Any ideas would be helpful.
> 
>          Bill Gerhold, K2WH 
> Hallicrafters, The Radio Mans Radio
>             http://www.w9wze.org/
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