I advised the operator that we tend to assume a receive IF bandwidth of
250 Hz and generally aim to maintain a 300 Hz separation from other
stations. (I believe that 300 Hz has been the figure quoted during LF
Group discussions and at the LF Forum.) I hope I did the right thing.
But with the fancy new receivers now available (which I'll probably
never be able to afford!), does the Group still feel 300 Hz to be a
reasonable separation for normal CW operation?
Over 10% of the entire band just to allow guard bands!!
What is wrong with some post Rx audio filtering - 50Hz BW is hardly
difficult even with analogue filters.
As I've now given up LF (it's become boring and 'just another operators
band') others can make more valid comments.
I notice in the call for papers for the July HF2000 conference in Guildford,
there is section scheduled on amateur 73 / 137kHz activities. Does anyone
on this reflector know who proposed this or is writing a paper. The
conference organiser I spoke to did not know where it came from !
Andy G4JNT
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