Hi Don,
Thanks for the reply. I do use the Hi-Cut for reducing from 2.7KHz
to about 1.8KHz with no problem. When you go much narrower the
intelligence is improved by raising the low cut frequency (especially
with low side QRM). Now you have to juggle with the Lo and Hi-Cut to
squeeze out the maximum intelligence. I would have preferred positive
detent style encoders for these controls.
A firmware change (SSB) to move the filter centre frequency down as
the "Width" control is reduced would mean this can be accomplished with
one knob. I understand this is being considered.
The present Lo-Cut step is a little coarse. I would prefer a step
size of 50Hz. This is important when you get close to 500Hz on very
narrow bandwidths. A low-Cut of 450Hz is still copyable but at 500Hz
there is a big reduction in intelligibility. Of course, voice
characteristics and your own ears make a big difference too.
It is possible to shift the steps by 50Hz but you have to move the
width control by 100Hz to do it.
Part of my problem is that I have poor eyesight and not much feeling
in the tips of my fingers. When I make an adjustment, the display has
gone back to VFO before I can read it...... The processor between my
ears is an old model with not much memory...... A while back, I used to
have senior moments but not any more...... Now I have non-senior moments
and unfortunately not too many of those.....! But the main thing is we
still have fun and the K3 sure helps in a big way in that department.
73
Tony Fegan VE3QF
Don Wilhelm wrote:
Tony,
To reduce the width on SSB, try just using Hi Cut instead of the width
and shift controls. Normally when reducing the SSB filter width, the
low end should be near 300 Hz (the K3 uses 250 by default). Keeping
the low frequency corner of the SSB filter fixed at 350 to 300 Hz
preserves intelligibility as the highs are reduced with the Hi Cut
control - try it, you might like it better than fussing with the Width
and Shift controls - I do it that way all the time, no need to adjust
the low end unless the filter is VERY narrow (less than 1400 Hz = Hi
Cut at 1650 Hz)
73,
Don W3FPR
Tony Fegan VE3QF wrote:
I am eagerly awaiting the firmware change that will shift the
filter centre (on SSB) as it is narrowed. This will make the filter
adjustment on SSB way more convenient.
Don Wilhelm wrote:
Tony,
To reduce the width on SSB, try just using Hi Cut instead of the width
and shift controls. Normally when reducing the SSB filter width, the
low end should be near 300 Hz (the K3 uses 250 by default). Keeping
the low frequency corner of the SSB filter fixed at 350 to 300 Hz
preserves intelligibility as the highs are reduced with the Hi Cut
control - try it, you might like it better than fussing with the Width
and Shift controls - I do it that way all the time, no need to adjust
the low end unless the filter is VERY narrow (less than 1400 Hz = Hi
Cut at 1650 Hz)
73,
Don W3FPR
Tony Fegan VE3QF wrote:
I am eagerly awaiting the firmware change that will shift the
filter centre (on SSB) as it is narrowed. This will make the filter
adjustment on SSB way more convenient.
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