set speed 9600 set port com1 set terminal type byte 8
sh/dx (Show DX spots) sh/filter (Show filter settings) set/nofilter (Deletes all filters) set/filter dxbm/pass 2-cw,2-ssb (Set filter for 2m only) dx G2XV/p 144360.0 JO02 beaming DL (to spot G2XV/P) help (if you need it) bye (to disconnect)
I used my Paccomm Tiny-2 Mk2, which worked very well. Any TNC should work, as long as it gives 1200 baud to the rig and 9600 baud to the computer.
For permanent use in the club shack, the folded Jaybeam dipole (in the shack) will be fine. For contests, there is a Vine 3 ele yagi with a 25dB front/rear ratio in the trailer, giving some protection against breakthrough. Place the yagi between the cluster node in JO02fh and your contest station. The bearing is 51 degrees from JO02ce and 61 degrees from IO92xd. Of course, the antenna needs to be vertically polarized. There is a mounting stub for the yagi available.
Any computer will do as long as it can be connected to the TNC. It needs a serial port or a USB-to-serial adapter. However, make sure it doesn't produce RF noise!
It is a good idea to switch off the screensaver. If you worry about the screen, the laptop isn't suitable for contests anyhow. All the computer needs to do is to run a serial terminal program, like minicom for Linux, Hyperterm for Windows (installed by default) or Kermit for DOS. Kermit can be downloaded from the internet.
The very old laptop labelled "14" (Opus Technology NB 386SX-20) was donated to the club by G4WSZ (thank you, Steve!). It is very quiet on 144 MHz, as long as it is set to LOW CPU speed (option 1 in the BIOS). It runs under DOS and has Kermit installed.
The computer used does not need a hard disk. If it can be booted from a floppy disk or a CD-ROM which also has a copy of DOS and Kermit (or Linux and minicom), it will work.
With the ADK 4001 comes a cable with a 4 pin microphone plug, a 3.5mm audio plug for the headphone socket and a 5 pin 180 deg DIN plug, which goes into a Tiny-2 TNC.
It is important to note that the AKD 4001 has DC voltage on some of the audio pins. If that get shortened out, the rig will break (it is repairable, however). For that reason, only the ground of the microphone plug is wired, but not the ground of the 3.5mm audio plug. Only the tip of the 3.5mm stereo plug is wired (to the RX input of the TNC). You cannot use the audio output of the microphone plug, as that has the wrong impedance (400mV at 47 kOhms, which is not suitable for a Tiny2).
The microphone plug layout is as follows: Looking at the front of the rig with the U dent on the bottom, bottom left is PTT, bottom right is mic input 60mV at 600 Ohm, top right is mic braid and earth and top left is not connected.
Also, you need a connection between the TNC and the computer. For a Tiny2, that is a normal serial cable and a gender changer to get two female 9 pin DB9 plugs (a RS232C cable). Look after this cable! If your TNC needs another connector, build it from scratch, or make an adapter, but do not rewire the existing one. You will need it sooner or later!
The connections are straight-through, but only five lines are needed:
(2 -> 2, 3 -> 3, 5 -> 5, 7 -> 7, 8 -> 8).
When everything is connected, boot the computer, start the terminal progam (settings are 9600 baud, 8N1, hardware handshaking).
Next, switch on the rig. It always boots with channel 16. GB7CDX is on channel 06 (70.325 MHz). Have an eye on the channel display, as every power cut will reset the channel! Turn the volume control fully clockwise and then anticlockwise to slightly less than half level (around 11 o'clock). Set the power level to low (or "Hi", if you feel that this is really necessary).
Switch on the TNC. You should see its boot messages in the terminal window. Watch the LED labelled "DCD". Turn up the squelch control on the transceiver a little bit further than just needed for the LED to go out.
Now we are in business. On the terminal window, there should be a prompt "cmd:". Connect to the node by typing "connect gb7cdx" or just "c gb7cdx". It will ask for your callsign. Use your own callsign or G8EVY (not /P, even if you are portable). The DX spots will come in all the time, but you can type in your commands in the meantime. Just don't get confused. Make sure the 2m station is not transmitting while you send the commands, or GB7CDX might not get them.
"help". You can use shortcuts such as "HE" or "?". There is a good manual in the system.
"show/dx" (or "sh/dx"). It will give you some of the last spotted DX stations. You may specify how many spots you want ("sh/dx/20") or the band ("sh/dx 14") or both (you guessed it: "sh/dx/20 14"). You can also specify that you are only interested in IOTA "sh/iota"or 4 meters "sh/4mtr".
To spot a station yourself, use "dx frequency callsign (optional comment)". Note that the frequency is given in kHz! Example: "dx G2XV/P 144330.8 strong signal".
You can (should) keep your user information up to date. The commands for G8EVY are:
set/name Cambrige and District ARC set/qth Cambridge set/location 52 11 N 0 8 E set/homenode gb7cdx
Use "show/name" etc to check your details.
"sh/time", "show/sun" or "show/muf cx5bw" is also good fun to use. Try "show" alone.
By now, you will have realized that there are a lot of DX spots coming up all the time. You can set a filter to narrow it down to the band you are interested in.
For a 2m contest, this would be:
set/filter dxbandmode/pass 2-cw,2-ssb,2-fm or set/filter dxbm/pass 2-cw,2-ssb,2-fm sh/filter displays your filter settings.
When you have a filter set, "sh/dx" will only show filtered spots. Use "sh/dx nofilter" to see what else has been spotted.
"set/nofilter" switches off your filter.