Eddy:
You might also consider, at some point, teflon tubing over the (brass)
frame rods. HV silicone at the ends of the tubing will prevent arcing
to the rods. In the case of RF switch, it was probably gonna go
somewhere, just took the easiest path. :)
Cheers, and HNY
Curt
KU8L
On 12/29/2011 9:37 AM, Eddy Swynar wrote:
*/Good Day All,/*
Many thanks for the many FB responses that I received here my recent
query in the matter of /GLYPTAL/ insulating paint / anti-corona dope...
Yesterday I visited my jobber in Toronto, & some eleven-plus dollars
later exited with 2 ounce bottle of "/MG//Chemicals/"-brand "*RED
INSULATING VARNISH*" ("/Protect motor winding, transformers, and coils
from arcing, discharge, moisture, and oxidation/"). The specs at the
back of the box it came in state that it's a modified alkyd with a
dielectric strength of 3KV / mil---"/Only one coat required. Apply
additional coats if extra protection or security is desired."/
I plan to use it on one of the /Centralab/ rotary directivity switches
that I use here with my phased transmitting array: awhile back I had a
dragging detente in one wafer, with a consequent "not meshed" switch
contact. The result was an arc to the binding rod that interconnects
the wafers.
To-day I hope to scrape away the carbon track that was left on the
ceramic, & coat all of the nearby metal with the insulating varnish
(the lazy detente has since been addressed), as an "insurance policy"
against any future similar occurance.
Thanks again, & my vy
*/~73~ de Eddy VE3CUI - VE3XZ/*
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