To: rsgb_lf_group@blacksheep.org
References: <1649946984.20170624173724@gmail.com>
 <594FCAFD.28958.1E2184@mike.dennison.ntlworld.com>
From: patgillen <g4gvw@aol.com>
Message-ID: <3b0fdda2-c0ae-a7f6-5423-5f269dbee05c@aol.com>
Date: Sun, 25 Jun 2017 16:24:08 +0100
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Subject: Re: LF: Insulating a Versatower from ground
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Chris, I was wondering if the possible solution might be to dismantle 
the existing mast and crane the ground post from the ground. Then one 
might enlarge the hole and line it with a very substantial insulating 
barrier before installing a replacement ground post into poured 
concrete, eventually reassembling the versatower to the ground post. 
Whether or not this would achieve your goal is open to debate but is 
such an amount of work and possible expense worth it?

73 de g4gvw


On 25/06/17 15:38, Mike Dennison wrote:
> Nice idea, Chris, but any insulation would have to withstand the
> thousands of volts on your antenna in all conditions (wet and dry).
> Might work for the lower volages on higher bands but I doubt it would
> be OK at LF. The other factor worth bearing in mind is the max
> permitted ERP which you must be close to already judging from the
> reports you are getting.
>
> Mike, G3XDV
> ==========
>
>> Has anyone tried making insulating bushes for the tilt over hinge and
>> the bottom locking peg on a crank up / crank over 40 or 60 foot
>> Versatower? How much of a detrimental effect would the steel 6 foot
>> above ground, concreted in support post a couple or three inches away
>> from it have? Specifically I am toying with doing this to use it on LF
>> 136kHz  with  my  horizontal  quad loop as the capacitive "top hat" to
>> gain  as  much  vertical height for the radiating element as possible,
>> right now the mast has a long insulated line to the corner of my
>> horizontal quad loop  with  the  vertical  some  way  from the mast,
>> although today to minimise  sag  from  having  the vertical some
>> distance away I moved it nearer  the  mast.  By  so doing I have
>> gained maybe another 8 feet of height. Thanks.
>>
>>
>>
>> Thanks
>>
>>    --
>>
>>    Best regards, Chris 2E0ILY
>>
>>      mailto:dead.fets@gmail.com
>>
>>
>>
>> ---
>> This email has been checked for viruses by AVG.
>> http://www.avg.com
>>
>
>

-- 
73 de Pat G4GVW QTH Nr Felixstowe UK