[Hallicrafters] SX-117 info

[Jim Liles]

Hi Jeff,

The dial slip is fairly common in the SX-117 and SR-150.  Both use a 
friction pinch method where the dial is slipped in a pinch pulley for 
coupling.  Make sure the tuning cap is free and lubed and clean the pinch 
mechanism.

If your radio is the "E" level you might read the posts regarding the 
personalities of the various levels and decide where you want to go with the 
radio: the most current level is not necessarily the best performer.

The K9AXN web site has schematics representing all of the levels.  They will 
tell you what level you are at.

Do not replace any of the paper LOOKING capacitors with ceramic.  They are 
General Instruments film capacitors that are probably as good today as 50 
years ago.  Also, they are film for a reason especially on the band width 
switch.  It's a common mistake to turn the radio over and mistake the film 
caps for the notorious Black Beauty caps and replace them with ceramic.

If you plan to keep the radio and make it the superb instrument that it can 
be, read the posts on this and the QTH reflector.  There also is a well 
written article in Electric radio that addressed some design issues: check 
it out.

Good luck    Kindest regards Jim K9AXN


-----Original Message----- 
From: Jeff
Sent: Sunday, February 08, 2015 9:01 PM
To: hallicrafters
Subject: [Hallicrafters] SX-117 info

All --

Looking for some first hand knowledge.  I just picked up a SX-117 with
matching speaker.  After replacing three tubes, and doing a cursory
alignment, I am VERY happy with this new rig.

I have a point of concern however -- it seems like the power transformer
runs quite hot.  My digital thermometer reads 149 degrees F after about
30 minutes of operation.  It doesn't appear to go past that, so I
suppose that is a good thing.  I'd appreciate anyone's thoughts or
experiences on that.  I will hook it to a bucking transformer to bring
the AC input down to 110 and see how that goes.

Second, the tuning dial has a bit of a slip in it.  It's only momentary,
and not reproducible at any specific point.  It also seems to diminish
after the radio has heated up.  While it isn't a problem now, if it is
something that can easily be addressed I'd like to deal with it before
it becomes a catastrophic failure.

I believe the one I have is the "E" revision.  I have the original
manual. Any recommendations that will improve longevity or performance
are greatly appreciated.

Jeff
WB3JIH



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