[TowerTalk] LMR 600 Water-proof Feed Thrus (+ H20 proof'g) DAVIS RF Response

[Stephen Davis]

Hi Jim,  I stand corrected....didn't interpret correctly what you were suggesting.

From what I hear, the DX Engineering enclosure is a nice one.  We don't handle such a product but we can save buyers some $$ on any products in the Polyphaser line.   In addition to in-coax line protectors, we also have had fellow hams buying service entrance protectors, as even hits on the utility line ground, even when a mile away from the shack, can be an issue coming into the house/shack on that utility line.  These protectors are expensive and any of the PolyPhaser parts can be seen on their website,  www.protectiongroup.com/Home  (some NEAT lightning pics there also).
  
If there is anything at all that I can help with, feel free to contact me....you don't need to have a possible buying need to talk with me.    Email me or call my direct line, below, as I am not at our 800 #, I am at a branch handling mostly commercial matters nowadays (not as much fun as ham radio matters !!  HI )     
73,   Steve ,  K1PEK, 

DAVIS RF Co.,  Div. of Orion Wire Co., Inc.

Wire, Cable, RF Connectors and wire aerial parts.  

LMR, Heliax, Eupen

Commercial / Military

Custom Cable Design

tel:  978-369-1738     Fax:  978-369-3484
www.DavisRF.com

On Jul 31, 2010, at 11:00 AM, jimlux wrote:

> Stephen Davis wrote:
>> Hi Guys,
>> Some observations: There was a reference to "Silicone Caulk" for
>> sealing the connector threads.  I think he meant Silicone grease.
>> Silicone grease is better for a number of reasons, and  although some
>> folks use Silicone caulk on the outside of connectors, and to seal
>> wire connections from coax to wire antenna feed points, I recommend
>> against it as there can be adverse chemical reactions with copper
>> wire and also silicone caulk will seem to adhere to PVC and PE (many
>> LMR's) outer jacket but in very short time the seal will break down,
>> letting water in.
> 
> 
> I was thinking silicone caulk to seal the the housing of the transient suppressor to the box, not for the threads.. The idea being that you drill a hole in the box and push the threaded part of the connector thru the hole, with the housing of the suppressor snug up against the inside wall of the box.
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> Cheaper and smaller than a bulkhead feedthrough and another cable inside the box from feedthrough to suppressor.
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> Of course, one could probably just use a piece of wire (not coax) to connect the center pin of the feedthrough to the center pin of the connector on the suppressor.  The shield of the feedthrough is solidly connected to the box, as is the housing of the suppressor, and the few inches of wire probably wouldn't make much difference impedance wise, at least for HF.
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> You'd use whatever usual scheme you want for sealing the actual connector.
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