[Amps] Low Pass Filter capacitor ratings for 1.5kw level

[Peter Chadwick]

Tom said:
>The biggest worry is generally current rating, not voltage 
rating. A secondary worry is impedance of leads if you 
intend to reject very high frequency harmonics.
The caps must of course have to have enough voltage, and the 
voltage can be higher than the input and output voltage 
depending on the exact filter design.<

I am not disagreeing at all with Tom, but would add that some extra headroom should be allowed for SWR - both in voltage rating and the resultant current in the capacitors. Although doubtless there will be an SWR sensor, it appears to me that designing to withstand a 2:1 is a good idea, to give some headroom before things can be shut down.
Incidentally, it isn't often recognised that there can be voltage step up in the middle of the filter.
73
Peter G3RZP