[R-390] Slug Rack Lube?

Bob Camp ham at cq.nu
Sun May 15 17:57:01 EDT 2005


Hi

Be careful with Teflon gun lubes in combination with other odd  
lubricants and cleaners. You can wind up with Teflon gumbo in a big  
hurry.

Moly powder and talcum powder have both been suggested as core lubes  
for the R390 not an A's .

     Enjoy!

             Bob Camp
             KB8TQ


On May 15, 2005, at 4:02 PM, Cecil Acuff wrote:

> Hi Barry and Group,
>
>        I have been working on an R-390 recently that is also  
> exhibiting the squeaking noise on a couple of the racks. I know  
> it's not the coming from the cam/bearing contact points because  
> they are well lubed and all rotating. (bearings) The ends of the  
> slug racks and the RF deck frames are not touching or loose in my  
> radio so It's not that...so it only leaves the cores sliding in the  
> coils.  The R-390 has no adjustment that allows tensions to be  
> removed from the cores due to slight misalignments as the "A"  
> does.  I noticed the cores are also coated with some type of shiny  
> outer coating as well.  Maybe to aid in friction reduction.
>
> I have heard of guys using a ceramic stone and polishing those  
> contact points.  I would assume some type of lubrication would also  
> be in order.  I have used the Mobil 1 synthetic lube at those  
> points as well with good luck.
>
> A good Teflon gun lube would also be another thought...
>
> Cecil...
>
>
> ----- Original Message ----- From: "Barry" <N4BUQ at aol.com>
> To: "R-390" <R-390 at mailman.qth.net>
> Sent: Friday, May 13, 2005 10:04 PM
> Subject: [R-390] Slug Rack Lube?
>
>
>
>> What are some of you guys using to lubricate the slug racks?  I  
>> have a very
>> squeaky 0.5 - 1.0 rack.  It is not the cam followers, but the rack  
>> sides
>> against the frame.  I had thought about some kind of silicone coating
>> (spray?) but didn't know.  It seems MobilOne is too thin in this  
>> area, but
>> maybe not.
>>
>> Thoughts?
>>
>> Thanks,
>>
>> Barry - N4BUQ
>>
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