K5PC wrote:
>I have another vacuum variable ready to mount;
800pf @ 18 kv, 150 amps.
Why not use an air-variable? My shunt-fed tower
has taken many hits with no damage to an old "bread
slicer" type 220 pF variable that has spacing of
almost 5/16" between meshed plates. I think I paid
about $5 for mine at a flea market and have several
more as spares. I suppose there is no capacitor with
voltage ratings adequate for lightning bolts but the
air-variable doesn't seem to suffer permanent damage
after repeated hits.
73, Bill W4ZV
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