Oops...
While stainless steel screws may perform useful mechanical functions
if applied correctly, they can NOT perform electrical functions at RF
because of skin effect.
73
Frank
W3LPL
---- Original message ----
>Date: Sun, 3 Feb 2008 09:52:39 -0600
>From: "Bill Parry" <bparry@rgv.rr.com>
>Subject: Re: [TowerTalk] hose clamps and end caps
>To: <Cqtestk4xs@aol.com>, <TOWERTALK@contesting.com>
>
>Bill
>
>Did you still use the hose clamps too? I considered the SS screw idea but
>decided that I would use the rivets instead. One hole in the element not
>two. Years ago I used to use aluminum self tapping screws but I quit that
>because I sheared a couple of those off.
>
>Bill
>
>-----Original Message-----
>From: towertalk-bounces@contesting.com
>[mailto:towertalk-bounces@contesting.com] On Behalf Of Cqtestk4xs@aol.com
>Sent: Monday, March 03, 2008 9:41 AM
>To: TOWERTALK@contesting.com
>Subject: Re: [TowerTalk] hose clamps and end caps
>
>In a message dated 3/3/2008 2:41:31 P.M. Greenwich Standard Time,
>bparry@rgv.rr.com writes:
>
>had two experiences that made me reconsider what I was doing. The first
>was putting up a KLM 15 6 element yagi. It had been up for a few weeks
>when
>two of the hose clamps popped and broke. I have always thought that I had
>tightened them too tight and the extremes of the temperature here in South
>Texas had done the rest. The elements slowly slid out and fell to the
>ground. I began to worry about how tight I should be tightening those
>clamps. With a ratchet, it is easy to break or over-tighten hose clamps.
>(Incidentally, I would replace those hose clamps while the antenna is
>down.)
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>My old KLM antennas used the hose clamp method. I simply drilled a small
>hole at each joint and inserted a small stainless screw covered with
>NoAlOx.
>It helped to secure the joint as well as making a good electrical
>connection.
>
>Bill KH7XS/K4XS
>
>
>
>
>
>
>
>
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