WA7KGX's blog

I need the CAT codes for my FT-991 so I can use the radio with WSPR.
Surely there must be someone at Yaesu who has this information.

The last Yaesu rig I bought was an FT-817nd which had the CAT codes in the back of its manual.
But the FT-991 manual does not include the CAT codes.

The FT-991 advertising copy talks about digital modes. Not too useful without the CAT codes.
"It is illogical to withhold required information Kirk-unit!" - V'ger probe in STTMP

After years of WSPR-ing I decided to give two meters WSPR a try.
The radio has CI-V (CAT) commands for setting frequency but not
transmit/receive. So I went into the microphone input so I could
use VOX to key the transmitter.

The 706 stock oscillator is nowhere near stable enough.
I tried the little German crystal heater but I couldn't get
the expected results. It couldn't counter the temperature
variation from the fan going full tilt during transmit.

I installed the German mini-oven in my IC706mkiiG.
I used two small diodes to drop voltage to 12v.
Hint: ROHS means hard to solder.

Currently I am using the mike connection and VOX control.

I don't know if anyone in the PDX area can decode these
signals.

Last evening I noticed some strong decodes from Australia, VK7BO in particular.
I dropped power to one milliwatt and got two decodes from OZ.

Recently the command:

svn co https://svn.code.sf.net/p/wsjt/code/branches/wspr

errors out before downloading all the usual files,
including "configure"

I've noticed the odd WSPR signal right at the bottom of the WSPR display lately.
They indicate good signal strength and timing, but WSPR does not decode them.

I checked my WSPR setup with a counter locked to GPS and my WSPR tuning signal
appears to be within 0.5 Hz of nominal.

I then tuned my receiver down 20 Hz and was able to decode KZ8C and KI7AB.

Moral of the story: If you choose to transmit near an edge of the WSPR sub-band,
don't expect everyone to decode you.

I recently fired up an old Pentium III motherboard to support an ISA GPIB controller.
The fastest ISA board I have is 800 MHz. (If you've priced a PCI bus GPIB controller,
you will understand my interest in an ISA bus motherboard.)

I downloaded the WSPR source code and compiled it under Fedora 16.
It actually ran. However, the CPU utilization was rather high.
One time I observed WSJT skipping a decode because it had to make a
transmission.

I was hoping I could run WSPR on the old box but it looks like GPIB
will be its function.

This afternoon's transmissions at 14.097022 are going out at
one half milliwatt or 500 microwatts.

I set transmit power to 1 watt on my Bendix 263 and 30 db
attenuation on my R-9000. I then switched out the attenuators
and dropped audio gain to compensate. Finally I dropped audio
further, another 3 db or so.

I use CAT (ICOM 756 Pro ci-v) for PTT and QSY.

The rigctl sub program fails to run
complaining about a missing libusb0.dll

Ham radio Deluxe 5.?? does not seem to need this
DLL to talk to the radio.

uninstalling 2.10 and reinstalling the old version
gets WSPR back on the air.

Rawhide is the development branch of Fedora on which new
ideas are tried out before general release. At the moment
Rawhide is working with the Nvidia driver so I can run
Compiz and all that good stuff.

I used SVN to get the current WSPR code. After installing
required packages, WSPR compiled. I had to change permissions
on ttyS0 to allow regular users to use it with WSPR.

Propagation was very good last Tuesday morning.
I was able to hit Antarctica with about one milliwatt using my Thunderbird 5 mk 2 at 60 feet.

Up to an hour or so ago, reported power on transmissions
of 5 watts or less were understated by 2-3 db. This was caused
by my MFJ tuner reading 2-3 db low in the one watt range.

While MFJ does not spec the accuracy of the wattmeter in the
993B, it is inelegant to show two significant digits when
the measurement accuracy is less than one significant digit.

I decided to try something fancier than the Minimalist
sound card interface I described previously.

I picked up a pair of fancy 1/8 inch mono Radio Shack
phone plugs for the latest iteration of my rig interface.
Everything worked normally until Thursday afternoon
when the stations stopped receiving my WSPR signals.
The fishfinder also showed no output. Adjusting audio
and RF gain for full output yielded nothing. But the
radio's microphone got out normally.

I changed from DTR to CAT for PTT and gained rig control in the bargain.
With the 756pro antenna on Auto, the antenna switch remembers the setting
for each band. Nice.

Using a dedicated sound card for both send and receive seems to make WSPR
stable under Ubuntu.

I had to download, configure, and compile the current hamlib to get the
756pro to play under WSPR. With Fedora, the list of rigs on station setup
comes up blank. Entering the rig number manually makes it happy.

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