Greetings,
Per Frank, W3LPL, a bit of refinement has been added to the "tuning
instructions" for his receive filters (as posted on my web page). The
additional text is below, or you can surf to
http://www.geocities.com/CapeCanaveral/1138/index.html
to get the full text, table, drawing and other details, on Frank's RX filter
design.
" * The three tuned circuits must be stagger tuned to provide the 10%
bandwidth.
If all three circuits are tuned for the same frequency, the resultant
bandwidth will be much less than 10%. The middle tuned circuit should be
tuned for maximum mid-band response; and the remaining two tuned circuits
should be tuned to
provide the desired bandwidth: That is, one of the remaining two should be
peaked near the bottom edge of the band; the other should be peaked near the
top edge, to provide the desired bandwidth. "
This should be the last update on this--promise!
Good luck in CQ WW this weekend!
73, Glenn Swanson, KB1GW
Avon, Connecticut
http://www.geocities.com/CapeCanaveral/1138/index.html
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