[Hallicrafters] SX-101 issue

[Paul Kraemer]

How about the grounding thru the tuning capacitor bearings?
Paul K0UYA

--------------------------------------------------
From: <hwhall at compuserve.com>
Sent: Monday, May 26, 2014 9:48 PM
To: <hallicrafters at mailman.qth.net>
Subject: Re: [Hallicrafters] SX-101 issue

>
> 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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