[Hallicrafters] HT37 "Jumpy"

[Al Parker]

Hi Jason,
	I haven't had this problem with my HT-32, and Richard might have it 
right, I've seen that happen with micas in receivers.  Also have seen 
the problem in receivers being at the VFO variable cap, dirty sliders on 
the rotating plates' shaft, and sometimes just dried grease in the 
bearings.  The variable in the HT-32 VFO is pretty robust, andnot high 
capacitance, but you might try getting a drop or 2 of DeOxit on the 
sliders (not real easy to get to, but possible just by opening the 
cover.  And a drop of oil in the bearings.
	Have fun on SKN, I might get on in a bit.
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 12/31/2012 7:33 PM, Richard Knoppow wrote:
>
> ----- Original Message ----- From: "Jason Hissong" <jhissong at gmail.com>
> To: <hallicrafters at mailman.qth.net>
> Sent: Monday, December 31, 2012 2:52 PM
> Subject: [Hallicrafters] HT37 "Jumpy"
>
>
>> Hi Guys,
>>
>> Fired up the HT37 in preparation for SKN this evening and I was
>> reminded of a problem I have with the HT37.  It seems to jump in
>> frequency in small jumps, not your typical drift.  Pretty much stays
>> in the passband of the receiver.  What would be some good places to
>> check for this issue?  I am thinking it could be mechanical.  It seems
>> to occur on multiple bands.
>>
>> Thanks es 73,
>> Jason N8XE
>
>      I am not very familiar with the HT-37 but one cause of this kind
> frequency jumping is unstable silver-mica capacitors.  The jump in value
> suddenly.
>
>
> --
> Richard Knoppow
> Los Angeles
> WB6KBL
> dickburk at ix.netcom.com
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