[WIARC] Tuning Utility

Michael Black via WIARC wiarc at mailman.qth.net
Mon Aug 4 08:06:38 EDT 2014


I'm looking for a volunteer to test my tuning utility.  It's actually a CW
generator.

I got tired of the tuning steps whenever I changed bands.
Mode -> CW
Power < 20W
Change freq a bit to find quiet spot
Key mic
Press tuner button
When SWR settles unkey mic
Power back to normal
Mode -> USB
Change freq back

With the SIgnalink hooked up to my computer all I really needed was to
transmit a sine wave.
So I wrote a small utility to do just that.

So now:
Start util – select Signalink, set output level to generate < 20W

So now when I change bands
Change freq a bit to find quiet spot
Click "Transmit"
Press tuner button
When SWR settles click "Stop" (it's the same button just renames itself
or
it times out after 15 seconds)
Change freq back

No mode change, no power adjustments on the radio.  Matter of fact I don’t'
have to touch the radio anymore.

Any volunteers to test this and give feedback?  All you need is a VOX
activated sound card like the SignaLink.
Eventually we may want to put this on the computer in the club shack as the
autotuner would be even fewer steps.  In that case you'd just click the
transmit button.  It's got a 15 second 500Hz sine wave that it plays and
then stops automatically or you can stop it yourself with another click.
I'm going to add rig control so that the software can automatically detect
good SWR and stop the transmit and can do the frequency shift too so just
one click is all it takes.  And 


Mike W9MDB




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