>> When a 5000v bandswitch breaks down with a 2800v PS, and R-supp gets
>> zapped on 80m, what else could it be, Peter?
>May I answer this one on his behalf?
>1. Fish food.
>2. Polly pooh.
>3. Various other contaminants that break down the insulating properties
>of high voltage devices, especially when some heat is involved.
This seems a bit unlikely with open contacts.
>For the same reason an auto engine's distributor works fine on 25 kV,
>but once it starts to "track", normally due to dirt, good bye.
There is no dirt visable in the photos of the burned bandswitches on my
Web site. My SB-220's bandswitch used to intermittently spit during 40m
operation. On 40m, there was a pecuilar double dip as the Tune-C was
rotated. The double dip disappeared when lower Rp suppressors were
- Rich..., 805.386.3734, www.vcnet.com/measures.
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