[TowerTalk] Connector Protection Grease

[Don W7WLL]

Another good  compound is CorrosionBlock made by Lear Chemical Research. 
I've used it for years here on the salt water in all of my connectors, pins 
and threads. Was put on to it originally by the folks at Englund Marine who 
supply the N CA, OR and WA fishing fleets. Commonly used in the fleet 
electrical/electronic connectors/connections. Have yet to have a connector I 
couldn't take apart as easily as the day it was first installed. Probably 
available at most marine supply stores. Comes in a grease, liquid and spray 
form. Besides its nonconductive and other good properties it won't wash out 
in the torrential rains we get each winter with all the salt in it. If 
needed it can be 'removed', unlike silicone greases.

Don W7WLL

-----Original Message----- 
From: Bob K6UJ
Sent: Wednesday, May 11, 2016 4:24 PM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Connector Protection Grease

Roger,

I was going to ask you if it is OK to flood a UHF connector with
silicone grease if I am
running 1500 watts thru it but then I reread your first sentence about
first being used
in the spark plug boots on B-17's.  So should be no problemo.......


Bob
K6UJ





On 5/11/16 1:19 PM, Roger (K8RI) on TT wrote:
> I would not hesitate to use a silicone dielectric grease in a UHF 
> connector.  Its first use was as a sealing grease in the spark plug boots 
> on B-17s in WWII for which it was developed.
>
> I think the silica in silicone greases confusion comes from the fact that 
> all silicones are essentially made from silica (powdered quartz) which is 
> highly abrasive, BUT the silica does not exist in silicones.  There is 
> nothing abrasive in silicones unless its been added somewhere along the 
> line.  Silicone greases and silicone RTV are all derived from Silicon 
> dioxide (Quartz, or silica).  Quartz (Silicon Dioxide) is turned into 
> metallic silicon. That is treated with chemicals producing a liquid.  That 
> liquid is treated, or processed in many ways to get the silicon used in 
> semiconductors, greases, water proofing, RTVs, to "non stick" treatments.
>
> That said, a high voltage arc, or any arc in silicones such as dielectric 
> greases will break the silicone down into silica which is highly abrasive.
> Silicone grease as we think of it is NOT a lubricant, EXCEPT for slow 
> speeds like door hinges and latches, or the old TV tuners.. Used in high 
> speed applications, it will break down into silica.
>
> I base my statements on having worked many years for the company that 
> developed these compounds.
> I retired from them as a corporate level project manager.
>
> 73
>
> Roger  (K8RI)
>
>
>
> On 5/11/2016 Wednesday 3:14 PM, Bob K6UJ wrote:
>> Riki,
>>
>> I am planning to use a dielectric grease as you for the same purpose.
>> I haven't decided yet which one to use.
>> Here is an interesting write up about selecting a grease from W8JI's 
>> website.
>>
>> http://www.w8ji.com/dielectric_grease_vs_conductive_grease.htm
>>
>> 73,
>> Bob
>> K6UJ
>>
>>
>>
>> On 5/11/16 9:01 AM, Riki, K7NJ wrote:
>>> I am considering applying Loctite Dielectric Tune-up Grease  to the 
>>> mating
>>> surfaces of connectors that are difficult to access at the top of a 
>>> tower. I
>>> would appreciate comments about this - especially from anyone who has 
>>> used
>>> this product for this purpose.
>>>
>>> 73, Riki, K7NJ
>>>
>>>
>>>
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