[Hallicrafters] SX-101 issue

[hwhall at compuserve.com]

 Seems like I recall some similar frequency jumping issues were reported to be due to ground connections that had gotten poor over the years, such as grounding screws, socket rivets, etc.

Wayne

 WB4OGM

 

-----Original Message-----
From: Mark K3MSB <mark.k3msb at gmail.com>
To: Al W8UT <anchor at ec.rr.com>
Cc: List Hallicrafters <hallicrafters at mailman.qth.net>; Robert Sauvan <rsauvan at beyondbb.com>
Sent: Mon, May 26, 2014 8:28 pm
Subject: Re: [Hallicrafters] SX-101 issue


Mine is completely recapped, and I hit the bandswitch with DeOxit.  I seem
to recall that I swapped crystals (maybe one....) with those in my 111, and
replaced a dog-bone cap near the bandswitch.   That's been many years ago.

The problem still persists typically after the radio is nicely warmed up.
I put it on the bench once with the intent of hitting some stuff with
freeze spray when it occurred, but of course it didn't occur whilst on the
bench.   I'm sure that never happens to anybody else.....

73 Mark K3MSB



On Mon, May 26, 2014 at 8:13 PM, Al Parker <anchor at ec.rr.com> wrote:

> Hi Bob,
>         I've been watching the thread, and having had several of the
> SX-101 family, was thinking along the same lines as Mark and Jeff, - the
> bandswitch.  My present, an SX-101A, has been in an "occasional" operating
> position since I bought it abt 8-10 yrs ago.  I've done very little to it
> in that time, but it's almost always had a similar problem as yours and
> exercising the bandswitch is the usual fix.  I think I did get in there
> once and used DeOxit, which has helped.
>         I got my first one about 17 yrs ago, and I did check the "pink
> chiefs" at the selectivity switch, and found they were OK, so haven't
> changed them on any since then.  Maybe they're getting to be a problem by
> now. One of these days, when I get a round tuit, I'll get into the 101A and
> five it a good refurb job.  There was a great series of articles in ER, by
> Ray O., on the complete job he did on his 101.  I recommend it for anyone
> trying to do more than a "get it going" job.
>         I suspect you'll solve your problem with a careful application of
> DeOxit.
> 73,
>
> Al, W8UT
> www.boatanchors.org
> www.hammarlund.info
>
> "There is nothing -- absolutely nothing -- half so much
> worth doing as simply messing about in boats"
> Ratty, to Mole
>
>
> On 5/26/2014 6:44 PM, Robert Sauvan wrote:
>
>> Well,
>> Seems everyone so far is pointing in the same direction. In answer to
>> Marks comment (K3MSB) yes the frequency changes when I move the band
>> switch back and forth. Does this indicate it needing a good cleaning or
>> something else? Jim (W5JO) brings up a disturbing bit of info. Im hoping
>> now that it isnt the temperature compensating cap since that looks to be
>> a very difficult to find if not an impossible fix. Im going to put that
>> one on the back burner for now and concentrate on cleaning the band
>> switch as both Mark (K3MSB) and Jeff (WB3JIH) both commented on. Hoping
>> I dont have to go as far as Jeff did and have to tear it all apart. Any
>> other comments are welcome and I will start a good cleaning of the band
>> switch for now and let you know what happens.
>>
>> Thanks-Bob-W0YBS
>>
>>
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