Properly lubicating the big hard-to-turn roller inductor in my 4K-Ultra
ampifier is very appealing to me. So, I went to the referenced web site
below, but I was confused by all the various carriers, grades and particle
percentages of molybdenum disulfide options available. Can someone please
spoon feed me and give me a part number for a small tube of the proper
grease/lub to use on the RF Roller Inductor. Thank You. de K5PZ Pete in
Dallas
----- Original Message -----
From: "Paul Marbourg" <zborg@comcast.net>
To: "Amp Mailing List" <amps@contesting.com>
Sent: Tuesday, September 09, 2003 12:43 AM
Subject: [Amps] RE: Lubircation of Roller Inductors
I would like to thank all the kind people who responded to my question
regarding the best lubricant for sliding contacts in an old EF Johnson
edge-wound roller inductor. Molybdenum disulfide is the obvious winner
here. Applied as a slurry solution in a very light film application seems
to be the best choice. Avoiding mineral or silicone oil carriers allows for
a dry-lubricating molecular film which does not attract dust. Unlike
graphite, which tends to be displaced by mechanical shear forces, molybdenum
disulfide bonds to the metal substrate and has innate metal-like
conductivity. I found the web site
http://metalshopper.websitecandy.com/category.asp?category=19 Rose Mill
Company and their line of Bemol Lubricants. They can provide bulk/small
quantities of Molybdenum Disulfide in various grades and particle sizes.
Using a metal-bearing grease type lubricant does not seem like a good choice
here. Aside from potential hydrocarbon or silicone oil contamination of
dielectric surfaces (aka: vacuum variable insulators), the metal in the
lubricant substrate is not as efficient in conducting RF as an innately
conducting substance like molybdenum disulfide.
Now if I could just make my amp do something truly useful like mow my
lawn...................................
Thanks again for the help.
73, Paul WN7T
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|