K3: KBPF3 and KFL3A-6K

[Don Rasmussen]

Roger, I have been lobbying from the sidelines that
when the (not yet available) FM filter is ready that
it should be usable for AM and FM reception both,
because 5 khz is not enough IMO. SSB reception through
this filter also makes sense to me.

At present, if you don't have the AM 5khz filter, the
2.7 khz filter is used on receive and there is no AM
transmit.

The FM filter is supposed to be ready by the end of
this week, don't know if it will be or if the firmware
is ready for FM, my cat control program cannot set the
FM mode yet.

All of these are fine tuning details, the radio is
absolutely worthy of getting serious about!!!




[Elecraft] K3: KBPF3 and KFL3A-6K
Roger Marrotte rmarrotte at verizon.net
Mon Feb 11 20:38:21 EST 2008

I'm finally getting serious about buying a K3.  Up
until now I have not paid much attention to all the
details, especially those concerning "the
filters".  For now I'll not get the 2nd RX.  It's not
available yet, so
maybe I'll get it later on. I'll get a couple of CW
filters for now. I do
mostly CW.  I'll get a narrow 1.8KHz SSB filter.  I do
get on SSB sometimes.
I sometimes like to listen to AM but will probably
never transmit on AM.
I've read the archives but I'm still not absolutely
clear about the need for
the KFL3A-6K filter in addition to the KBPF3 filter
for AM listening.  I see
the need for the KBPF3 for AM listening outside the
ham bands.  What will
the KFL3A-6K filter do for a casual AM listener?  Will
there be a noticeable
narrowing of the AM signal without it?  If the AM will
sound better and/or
be better filtered with it, I might as well get it.
I'm cheap but not that
cheap.
 
Roger, W1EM


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[AJSOENKE]

In a message dated 2/11/2008 8:35:24 P.M.  Pacific Standard Time,
[hidden email] writes:
Roger, I have been lobbying  from the sidelines that
when the (not yet available) FM filter is ready  that
it should be usable for AM and FM reception both,
because 5 khz is  not enough IMO. SSB reception through
this filter also makes sense to me.  

At present, if you don't have the AM 5khz filter, the
2.7 khz filter  is used on receive and there is no AM
transmit.

The FM filter is  supposed to be ready by the end of
this week, don't know if it will be or if  the firmware
is ready for FM, my cat control program cannot set the
FM  mode yet.

All of these are fine tuning details, the radio  is
absolutely worthy of getting serious  about!!!




[Elecraft] K3: KBPF3 and KFL3A-6K
Roger Marrotte  rmarrotte at verizon.net
Mon Feb 11 20:38:21 EST 2008

I'm finally  getting serious about buying a K3.  Up
until now I have not paid much  attention to all the
details, especially those concerning  "the
filters".  For now I'll not get the 2nd RX.  It's  not
available yet, so
maybe I'll get it later on. I'll get a couple of  CW
filters for now. I do
mostly CW.  I'll get a narrow 1.8KHz SSB  filter.  I do
get on SSB sometimes.
I sometimes like to listen to AM  but will probably
never transmit on AM.
I've read the archives but I'm  still not absolutely
clear about the need for
the KFL3A-6K filter in  addition to the KBPF3 filter
for AM listening.  I see
the need for  the KBPF3 for AM listening outside the
ham bands.  What will
the  KFL3A-6K filter do for a casual AM listener?  Will
there be a  noticeable
narrowing of the AM signal without it?  If the AM  will
sound better and/or
be better filtered with it, I might as well get  it.
I'm cheap but not that
cheap.

Roger, W1EM

+++++++++++++++++++++++++++++++++++
 
I believe the only real issue with the FM filter in AM mode is in  
transmitting and risking out of bandwidth transmission. The DSP would need to  hold the
AM XMIT to the legal limit if the XTAL filter doesn't.
 
Al WA6VNN



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