Bob,
Look at the LEDs for those knobs.
If they are set to Width and Shift, you can change the center frequency
with the Shift knob and the width with the Width knob. That is usually
good for CW.
Push either knob and the LEDs will change to HiCut and LoCut. That is
good for SSB and other voice modes. You will not be able to cut the Low
a lot, a voice signal must have some content in the 300 to 500 Hz range
to preserve intelligibility, but the high side can be cut significantly
to reduce high pitched interference without a lot of loss of
intelligibility. The voice may lose much of the 'recognizabity'
content, but communications can continue.
So bottom line, use Shift and Width for CW and Data modes, and use HiCut
and LoCut for voice modes. There are advocates for using Width and
Shift for voice modes, but when you change the width, you also must
change the shift to maintain intelligibility because both the low and
high frequencies are cut. Using HiCut and LoCut for voice is much
easier IMHO.
73,
Don W3FPR
On 5/28/2013 8:35 PM, KD7YZ Bob wrote:
Howdy K3' people:
There's a 6m opening to South America right now. The most I am working
aere CW in the Brazil and Venezuzla region.
CW.
I've been making great use of the filters, my 8-pole matching, and so
forth.
Suddenly I have no control of the upper-left knob. No Shift. No "Lo". If
I push it in, the beep goes butI see FC*060
usually I could shift the filter response drawing back and forth.
If I hold it in, I get <NOR> but still no control
Somehow I also can get a QRQ off or QRG off .. dunno, can't make it
happen every time . may not be related.
Mainly, pushing upper-left knob makes the green LED go from Shift to"LO"
and the width LED to "HI"
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