Topband: alternative feedpoint capacitor

[Steve Flood]

My top-loaded vertical needs a series 260pF capacitor at the feedpoint to
match the 53 + j335 impedance (1.825 MHz) to my coax feed.

I have a few different air-variables I could use, but I was wondering what
sort of fixed capacitors would be suitable in this application.

Max power is 1500w.  I have doorknob caps but they don't have current
ratings marked on them.

 

Thanks,

Steve KK7UV  



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