[TowerTalk] Re: Cushcraft R8-electrical noise

[Stephen Reichlyn]

Hello, Doc:
The water is about 8 feet deep (depending on the tide). I'm going to try
the grounding with the conduit (and also changing the conduit to a new
piece with new lag bolts). The ones that are on there now are very rusty 
and may be causing some stray rectification.
Thanks for the reply.
Regards,
Steve AA4V

In article <39ECF3C9.C1343B3@oio.net> 'Doc <w5lz@oio.net> writes:
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>From: 'Doc <w5lz@oio.net>
>Newsgroups: rec.radio.amateur.antenna
>Subject: Re: Cushcraft R8-electrical noise
>Date: Tue, 17 Oct 2000 19:50:17 -0500
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>Stephen Reichlyn wrote:
>> 
>> I recently built an R8 to replace an fairly unruly R7000. The R8 is superior in
>> every way to the R7000 EXPECT that on 10 Mhz (and a bit on 7 Mhz) I have
>> electrical noise at S7-S9 strength. When I use another antenna to listen on 10
>> Mhz (a 7 Mhz F12 vertical), there is no electrical noise other than normal
>> atmospherics. I have used a portable SSB receiver that will cover 10 Mhz and
>> the signal is clear of electrical noise UNTIL I touch the portable's whip
>> antenna to the R8 mast, I can hear the electrical static. The R8 is mounted
>> on a 6 foot long piece of heavy duty conduit which is pinned in the middle to
>> a timber piling on the end of a pier over salt water. The conduit is NOT
>> grounded to anything but is attached to the piling in two places with large
>> lag bolts. Of course, the R8 is also not grounded. There is no electrical
>> noise obvious on the bands above 10 Mhz. Feed line coax shield problem? Any
>> ideas?
>> 73, Steve AA4V

>Steve,
>    Just for "grins", ground the conduit and see what happens.  Being
>on a pier, grounding the conduit shouldn't be very difficult (how deep
>is the water?).
>                           'Doc


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