Capacitors have current ratings too. Voltage is one parameter and
the current rating is another.
Lee, w0vt
?
?
3 KV
disk Vishay and installed it.??If I run a 1500 watt
carrier through it for about <15 seconds, it gets
warmer than lukewarm.?? Warmest on 10 meters as I
would expect.
?
?
##?
1500? watts? =? 5.5 amps into? 50 ohms.? That's a
helluva lot of current.? The problem? with? disc
ceramic caps is.... they never post any RF? current
ratings on them.? ?Ideally, they should post a? ?CCS?
RF? current? vs? freq chart.? ?Actual? current ratings
are all over the map...and must be? determined by
testing.?
##? Big
difference between? a .01 uf? @ 1 kv rated cap... vs a
.01uf? @ 2 kv rated cap... the 2 kv? versions are typ
bigger diam, like 25mm? OD... vs the smaller diam? 1
kv units.? ?The? 2 kv versions, being bigger diam,
handle more current..which testing confirms.? ?Once
you get to the? 3+? kv rated units, they don't appear
to handle any additional current,? just a greater V?
rating.?
##? I
bought 2 x doz? .01uf @ 1.3 kv? disc ceramics? from RF
parts? last year.? Huge things at? 25mm? OD, and
really thick.? ?These things handle loads of current,
best yet so far.?
## For?
your heath switch box application,? parallel a 2nd
cap? in the remote switch box...then re-test.?
?Parallel a 3rd cap if required.? ?You should have
zero heat..on any freq.? Dunno if the heath? box is?
good up to 6m or not.? ?
Jim?
?VE7RF
