[TowerTalk] GE HV silicone spray ?

[Don Moman VE6JY]

​Jim, this may be similar.... Available locally at Gregg Distributors.... I
use a product  labeled as "Spayon"  (by Sherwin Williams) 00600 Clear
Insulating Varnish.  Says on can that dielectric strength is 1000 VPM
(volts per millimeter I guess).​  They also make a red version (SB-6-665)
with 1100 VPM.  I use it routinely to seal antenna DE and balun connections
etc.  Seems impervious to weathering....

73 Don
VE6JY

On Fri, Nov 7, 2014 at 6:58 AM, Jim Thomson <jim.thom at telus.net> wrote:

> I bought  a spray bomb of this stuff back in the  late 70s.   It dries
> clear + hard.
> The HV standoff on it was phenomenal.  A local buddy had a shunt
> fed tower for 160m, and the air variable cap inside would arc with just
> 100w.
> After spraying the GE stuff on...and let dry for a day or two... zero
> problems
> with arcing.   I brought my small amp, that had 160m on it....and we
> stuffed
> 1.1 kw through it...and still no arcing.
>
> Another fellow had a yaseu FL-2100B amp... abt 650 w out....and they used a
> small broadcast style cap for the load cap. Barely .025 inch spacing.  The
> cap
> arced on 15m..so the owner tried to clean out the carbon, and ended up
> bending the
> plates..and made a mess of it.  They touched at one point in their
> rotation.   I sprayed
> the GE in there.... and zero problems after that.... and the stator /rotor
> plates still
> rubbed.   They were  touching right where the load cap was tweaked for max
> po.
>
> For an experiment, I scrubbed all the gunk off my new (at the time in 1980)
> 6061-T6  tubing with steel wool /jets pads etc.  This was for a hb 5 –el
> 10m yagi.
> Once super clean, dry and shiny... I doused the eles  with the GE spray
> bomb.
> Those eles stayed shiny  up until just a few years ago.
>
> It was amazing stuff.... and have tried to track it down over the years
> with very little
> success.   It’s a cheap and easy way to HV insulate anything..and also
> useful for
> connectors, and a myriad of other uses.   Does this stuff still exist?  I
> think it may
> exist under a different designation or heading.
>
> Jim   VE7RF
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