I'd been meaning to ask for a while; what is the motivation for those
of you who have ordered the general coverage receiver option? i.e. what
makes it worth the extra $129 ??
~Iain
Ron D'Eau Claire wrote on 07/28/08 07:35:
Joe asked:
What is the General Coverage Receive Filter, how does it work? If it is
just
another roofing filters, why not just use the 6.0 filter?
-------------------------------------------------------
It's not, Joe. The KBPF3 provides additional receiver input bandpass
filters.
The input bandpass filters are L/C filters that are switched
automatically according to the frequency band selected to protect the
receiver from strong out-of-band signals hundreds of kilohertz or even a
few megahertz away from the desired signal.
The first I.F. "roofing" filters follow later in the signal path to
provide selectivity within a few kHz or a few hundred Hz of the desired
signal.
The basic K3 is equipped with input filters covering the 160-6 meter Ham
bands. These filters also allow reception near the Ham bands but, as you
tune farther from a Ham band, the sensitivity will drop off as you move
beyond the edge of the filter bandpass. This is most apparent when
trying to listen to AM broadcast band stations below 1,000 kHz without
the KBPF3, but a significant loss of sensitivity occurs whenever the
basic K3 is tuned far from a Ham band.
The KBPF3 provides additional input filters that are switched in
automatically to cover the out-of-Ham-band frequencies between 500 kHz
and 30 MHz.
Ron AC7AC
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
