Someone asked whether the filters I designed will handle
200 watts. No they won't--the losses are too high.
However, if someone wants to tackle some new territory in
filter design--may I suggest coupling two small transmitting
loop antennas? A transmitting loop can be used as a very high
Q resonator that will handle lots of power. Ideally, these
would be rigidly enclosed in shielded enclosures. Walking near
an unshielded loop will detune it--not to mention the RF safety
issues.
Good mechanical construction is essential with high Q filters.
A little bit of coil wobble can cause serious problems in a narrow
filter--this is why I mounted the coil on a PVC form. You should
also take into account thermal stability issues.
73--Zack Lau W1VT
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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