I had a 20 year old HyGain 204BA that needed new rubber pieces. I found it
necessary to replace
the element end caps plus the insulators on the inner end of the driven
element. A couple of end
caps were missing and the exposed portion of the insulator was quite pitted
from long exposure to the
sun, I presumed. Or maybe flashover from lightning? In any case, it was an
easy way to make it
like news again. I didn't polish the elements though. As I recall, they
also offered a rubber parts
kit for a TH6 that needed similar repairs.
-- Tom/K1KI
At 09:21 PM 10/28/2015, Jim Thomson wrote:
>Date: Wed, 28 Oct 2015 13:43:36 -0400
>From: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
>To: W5GN <w5gn@mxg.com>, towertalk@contesting.com
>Subject: Re: [TowerTalk] Strange happening with 10 Meter Beam
>
>Thanks Barry for the suggestions....I took the beam down and replace the
>deteriorating cup insulators that seems to have turned into a carbon
>resistor. This is what gave me the low VSWR but also acted like a dummy
>load, thus low signals but good VSWR. I did not know that the cup
>insulators could turn to carbon resistors but apparently they
>did.....but the beam was bought in the states near an industrial zone
>and I guess anything could happen as it did.
>
>## are you talking about those....black booties that hy gain used on the
>inboard ends of the DE ?? How the heck can they turn to charcoal ?
>They were pretty thick walled on my old hy gain 204-BA. Guess
>folks should stick a DVM from each inboard ele to the boom.Should
>read infinite. Can you clean the old ones, or are they completely
>trashed ? If that was the case, I can see where a lot of various
>yagis are not performing up to snuff.
>
>J
--------------------------------------------------------------------------------------------------------------------
e-mail: frenaye@pcnet.com YCCC --> http://www.yccc.org/
Tom Frenaye, K1KI, P O Box J, West Suffield CT 06093 Phone: 860-668-5444
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