In article ,
Gary Schafer wrote:

The 8" is not quite as sharp as the 10". The 8" at .5 db insertion
loss shows: at 1 mhz away it is down about 15 db. At .5 mhz it is down
about 8 db.
At 5 mhz away it should give abut 30 db attenuation. That should wipe
out the paging transmitters but the pass band is still too narrow to
cover much of the marine band. Fine for a single frequency.

Like you say, if you had two of them in series and stagger tuned them
then you would probably be ok. You could get an adequate bandpass for
most of the marine channels. Although the insertion loss would be a
little higher. The rejection at the paging frequencies would be
greater too.

Regards
Gary

I always like the use of 1/4 wave Tuned Stubs for each Paging Frequency
in question. Seems like that always worked for me.....


Bruce in alaska
--
add a 2 before @