W8JI has a pretty good article about conductive vs dielectric grease on his
website. It certainly cleared up the question for me. Google will take you
there.
Tom H
K0SN
> On Jan 2, 2020, at 1:23 PM, MU 4CX250B <4cx250b@miamioh.edu> wrote:
>
> I’m dubious about using conducting grease for roller inductors.
> Generally, I’ve used a thin coating of dielectric silicone grease for
> that kind of application. The purpose is to lubricate the roller
> connection, to keep moisture out, and to inhibit oxidation. Under the
> pressure of the roller against the coil, there’s a good metal-to-metal
> contact. Using silver bearing grease as an interface between the
> roller and the inductor surface just puts a lossy, grainy material
> where it will do no good. Conducting grease is mostly useful where one
> needs a good thermal bond, as on a CPU IC or heat sink surface.
>
> This debate comes up regularly with respect to lubricating the center
> pin of PL259 connectors. Although it seems counterintuitive, using a
> small amount of pure silicone grease is far better than putting a
> conducting lubricant on the center pin.
> 73,
> Jim w8zr
>
>
> Sent from my iPhone
>
>> On Jan 2, 2020, at 10:11 AM, Jim Thomson <jim.thom@telus.net> wrote:
>>
>> Date: Sun, 29 Dec 2019 11:02:34 -0600
>> From: Rob Atkinson <ranchorobbo@gmail.com>
>> To: "Lou Everett, Sr." <loueverettsr@gmail.com>, "amps@contesting.com"
>> <amps@contesting.com>
>> Subject: Re: [Amps] Dielectric grease for roller inductors?
>>
>> <MG Chemicals Silver Conductive Grease. Cat. No. 8463-7g 7 grams 1/4
>> <oz. http://www.mgchemicals.com Toronto Canada 1-800 201 8822
>> <https://www.mgchemicals.com/products/greases-and-lubricants/conductive-greases/silver-conductive-grease-8463
>>
>> <Comes in a syringe dispenser. $22 on Amazon. Getting enough to smear
>> <all over an inductor would cost more than the inductor.
>>
>> <73
>>
>> <Rob
>> <K5UJ
>>
>> ## since I have to order more...cool-amp silver plating compound,
>> I will also order some...conducto-lube at the same time.
>> Its way cheaper vs buying the MG chemicals silver conductive
>> grease. 2/4 ozs will last a long time. Indefinite shelf life.
>>
>> ## Conducto lube is 75% pure silver and 25% mineral oil. Its made
>> for sliding contacts, and mine are all sliding.
>>
>> ## I will also experiment with it on some spare model 88 band
>> switches I have in the shop.
>>
>> ## 1 oz covers 480 square inches. Comes in 1-2-4-8 oz containers.
>>
>> Jim VE7RF
>>
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