[TowerTalk] B&W Center Insulator for dipoles

[Roger (K8RI)]

> Many thanks to Pete, Norm, Kent, Jim and Clint for the feedback on the B&W 
> dipole center insulator.
>
> No doubt I will need to fab some kind of rubber bushing to replace the 
> long gone original.  I recall getting this with a roll of coax and that 
> there was many wraps of black tape trying to do the job.  yeah, sure.

I would think the rubber bushings used in electrical compression fittings 
for weatherproofing would work although I don't know how much room is in 
there.  I used them on occasion with external connections

Good Luck,

Roger (K8RI)

>
> I did scrape off the remnants of the 'goop' that had been applied.  I will 
> need to select a replacement that seals but won't epoxy the halves 
> together.
>
> Weight does not bother me as it will not be that much more compared to the 
> coax hanging from it at 60' or so.  I plan on some real stiff wire and 
> rope and to just stretch it tight with some kind of strain relief on the 
> rope end coming down from the treetop from the pulley.
>
> Thanks again for the nice feedback!
> Al
> N6TA
>
> -------------- Original message -------------- 
> From: "Norm Duxbury" <duxburyn at bellsouth.net>
>
>> Yes, you're missing an insert that acts as a gasket and supports the coax
>> cable. You're probably also missing the tube of "goop" that seals the 
>> unit
>> around its periphery.
>>
>> 73, Norm - W1MO
>> (old-timer)
>>
>> ----- Original Message ----- 
>> From:
>> To: "TowerTalk"
>> Sent: Saturday, July 07, 2007 20:54
>> Subject: [TowerTalk] B&W Center Insulator for dipoles
>>
>>
>> > One of my junk drawers just coughed up a B&W cast aluminum center
>> insulator for dipoles. It is a two piece clamshell design that is really
>> heavy duty with eye bolts, ceramic insulators, gaskets and seems to want 
>> to
>> clamp to the coax feedline.
>> > My question to the old timers out there is why is hole for the coax 
>> > 9/16 "
>> diameter, much too large for RG-8 type coax? Am I missing a part that is 
>> a
>> gasket of some kind that would make the RG-8 fit?
>> >
>> > If this B&W unit is used correctly, I seems like it could take a LOT of
>> tension and weight of coax hanging a long way down. I plan to raise my 80 
>> M
>> dipole to heights it has never seen before!
>> >
>> > Tnx
>> > Al
>> > N6TA
>> > _______________________________________________
>> >
>> >
>> >
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>>
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