Topband: Voltage rating of matching capacitor(s)

[Dave Heil]

Paul Baldock wrote:
> For the Traditional Cs/Cp Omega Match, Cp the shunt capacitor is 
> between the antenna and ground so it has to withstand substantially 
> the same voltage as the series capacitor, which is many KV.
> 
> In my shunt fed tower setup the shunt capacitor is around 75pF and 
> for that I use a short piece of hardline. This is obviously a fixed value.
> 
> My series capacitor is a gigantic air variable with about 3/8" 
> spacing between plates.
> 
> Paul - KW7Y


The simplest rule of thumb for this stuff is that the series cap spacing 
should be at least as much as your amplifier's tuning cap and that the 
spacing on the parallel cap should be at least as much as on your 
amplifier's loading cap.

Dave K8MN