Hi Bill,
The standard front end filters are tuned to the Ham bands only. Far
enough outside of our bands the receiver will loose a lot of sensitivity
because of this. To cover the regions used e.g. by broadcasters you need
the KBPF3. This has nothing to do with the roofing filters.
Depending upon your need to transmit AM and or listen to AM in a higher
quality, you can use either the SSB filter for reception only (you
listen to either the upper or lower sideband using SSB), or you need the
6kHz filter for "real" AM demodulation, which also gives you the ability
to transmit AM. I wouldn't use the FM filter for this, but ymmv.
For FM you will need the FM filter.
Also if you want to add the second rx, don't forget that it needs its
own filters. It does not share the KBPF3 or roofing filters with the
main rx.
Hope this helps,
vy 73 de toby
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