[Heath] [Heathkit] Ready --> Lubing / Unsticking' the SB-401 LMO

[RAY FRIESS]

Is the alcohol for you...  or the LMO?   HI HI


> From: rsmyers at rogers.com
> To: heathkit at yahoogroups.com; heath at puck.nether.net; heathkit at mailman.qth.net
> Date: Mon, 4 Aug 2014 23:05:49 -0400
> CC: rsmyers at rogers.com
> Subject: [Heathkit] Ready --> Lubing / Unsticking' the SB-401 LMO
> 
> My SB-401 LMO ...
> 
> On hand I have some Liquid Wrench, Mean Green, a jug of Anhydrous Isopropyl
> Alcohol (99.997% pure), Teflon grease (and Teflon needle dispense liquid),
> Caig Labs DeOxit 5% spray, and DeOxit 100% needle dispensed,  Caig Labs 'Pro
> Gold' 5% spray,  Isopropyl alcohol in a compressed cylinder, compressed air,
> Syringe of silver conductive grease (from MG Chemicals), Singer Sewing
> machine oil, and dental tools :)
> 
> I am ready to take on my SB-401 LMO.  Am I missing anything?
> 
> Thanks for all the advice, everyone.
> 
> Regards,
> -- Rob Myers, VE3JQL
> 
> -----Original Message-----
> From: Heath [mailto:heath-bounces at puck.nether.net] On Behalf Of Kenneth G.
> Gordon
> Sent: July-28-14 7:25 PM
> To: Mark V Johnson
> Cc: Heath at puck.nether.net
> Subject: [Bulk] Re: [Heath] Lubing / Unsticking' the SB-401 LMO
> 
> On 28 Jul 2014 at 10:47, Mark V Johnson wrote:
> 
> 
> > When I read your first post I would have thought the problem was not 
> > sticking end to end lock tabs, or washers, but a misaligned dial.
> 
> I have had to deal with the sticking lock tabs at least twice.
> 
> > I've seldom had problems with the slip disc's.
> 
> As I said, I have had problems with those things at least twice: both times,
> cleaning the old lube out of them, and relubing with something better fixed
> the problem
> 
> > If you have the LMO out of the radio and want to fix any chance of 
> > intermittent function due to the variable capacitor contact wipers 
> > being dirty or worn, I'd recommend a fix I've used on all my Heath 
> > gear and that is soldering a small piece of braided wire directly to 
> > the variable cap rotor and the grounded frame.
> 
> I have found this to be absolutely necessary this many years after the LMOs
> were made. I highly recommend it. 
> 
> > It's easier with the tube LMO's but certainly doable on the SB-102 
> > solid state units. Worth the effort.
> 
> Yes. WELL worth the effort.
> 
> Ken W7EKB
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