- FodTrack is a simple,
straightforward program intended to control an azimuth
elevation rotator like the Yaesu-Kenpro 5400/5600, and a
transceiver, for any kind of satellite orbits. Best
efforts have been made to provide state of the art
tracking accuracy, within the limitations imposed by
commonly available orbital data.
- FodTrack runs in
foreground, continuously displays what it is doing, uses
no special system resources, and is so simple to use that
you should not have any trouble trying to figure out what
is going wrong when the silly satellites seem to go in
another direction than your antenna...
- The rotator can be
connected to any parallel port using an interface built
according to the schematic provided with the program.
LPT2 is a good candidate, as it is often present and
seldom used. It can also be controlled via any serial
port, using the Yaesu GS-232 or the RC-2800 interface.
Nonstandard ports are welcome, just you need to know the
address. No IRQ is needed.
- The radio can be
connected to any serial port. Just the same as for the
rotator port, only the address needs to be known to be
able to use any port.
- The radio can be
combined with converters for any satellite band from 145
MHz to 24 GHz.
- FodTrack supports an
NMEA talker device like a GPS receiver, for automatic
setting of the time and location. It can be connected to
any serial port at any address. It does need an IRQ line.
All possible IRQs are supported (2, 3, 4, 5, 7, 9, 10,
11, 12, 15).
- FodTrack is best suited
for those setups where a single PC runs a multitasking
environment, like DESQview, with the satellite software
in one window, a BBS in another, and your favorite game
in the third. Just open a fourth window and put FodTrack
there, it will be happy. It works with WISP under Windows
too, but it has not been specially written as a
- You can also use an
independent computer for FodTrack. But you cannot run it
in background. If you want background operation, there
are other programs available for you.
- FodTrack implements
antenna flipping, so the satellites will not run against
your rotator's end stop. Rotator stop position can be
south or north.
- The FodTrack rotator
interface cannot drive the rotator against its stop
position. The limits are set in hardware, so even if your
computer goes crazy, locks up, or whatever, your rotator
will not be damaged by being driven against a mechanical
- It can run under manual
or automatic control. In automatic mode, a skeduler like
WA2N's SatSked can provide the commands. Two modes for
automatization are provided: In the preferred one,
FodTrack runs continuously and is controlled via a
command file; in the alternative one, FodTrack is called
for a specific satellite, and aborts after one pass.
- You can use FodTrack to
control only your rotator, only your radio, or both.
Control for Yaesu FT736, Kenwood TS790 and several Icom
radios is implemented. IK3NWV tested it on a TS790, while
IK0XBQ made the Icom test with an IC820.
- Thanks to them for the
beta testing. On the FT736 I tested it, and I'm using it
permanently with that radio.
- Probably it will run
with other Kenwood radios, and perhaps also with other
Yaesu radios, but this has not yet been tested.
- FodTrack is free for
noncommercial use. If you want to reward me somehow,
write a piece of useful software and put it in the public
- FodTrack is provided
without any guarantee that it will really do anything of
all the nice stuff this document says. But please, if you
find a bug, tell me, so I can fix it for the next
- Setting it
- This is VERY easy. Copy
the FODTRACK files to a directory of your choice. You can
also maintain the kepfile there, but if you prefer you
can use a kepfile at some other place.
- Edit the FODTRACK.CFG
file to reflect conditions at your station. The file
explains itself. If you don't understand the use of some
parameter, leave it at its default value.
- Edit the FODTRACK.FRC
file according to the satellites and frequencies you want
to use. Do not include those birds for which you don't
want automatic transceiver control. It's good enough to
put the nominal frequencies into this file. Later you can
fine-tune the frequencies from inside the program.
- If you want to track a
satellite on several different frequencies, you can
define several data blocks for that sat, differentiating
them by a tilde character (~) and any designator you
like, after the sat name. For example, you could define
AO-16 with the normal mode-J frequencies, plus AO-16~S
with the frequency of the S-band beacon. In both cases
the program will use the keps for AO-16.
- You can define a
"pseudo-satellite" in this file, called PARK.
This will send your Icom or Kenwood radios to the parking
frequencies and modes specified there. Yaesu radios
return to the frequency they were on before the start of
the pass, regardless of any PARK data specified here, if
you leave the SAT switch in OFF position.
- If you will run the
program from somewhere else, you need a path to the
- The kepfile must be in
2-line format, with the satellite name appearing above
each 2-line block. Title lines are no problem. They are
not needed, but they do not disturb.
- Running it:
- Execute FODTRACK.EXE.
The program will come up, read its configuration file,
and then it will read the command file (FODTRACK.CMD).
The default command file says "NONE", so the
program will stay idling. That's a good time to look
around the screen:
- You will see a status
display, which says what the program is doing. It can be
idling, waiting for a satellite, tracking it, calculating
AOS and LOS while guessing if it is convenient to flip
the antenna over, calibrating the rotator, or accepting
your incremental tuning input.
- There is a nice clock,
ticking away your valuable seconds; also there is a line
telling you that the satellite selection is automatic,
and several windows without any data in them. They will
come to life when you select a satellite.
- There's also a small
reminder for the commands you have available. Please note
that the commands in the box are only available while in
manual mode. During AOS-LOS calculation and GPS reading
the keyboard is dead.
- Now let's play a bit:
Type the letter m to get the program into manual mode,
then to start tracking a satellite. The program will ask
you which satellite you want. Enter its name exactly as
it appears in the kepfile, otherwise FodTrack will be
very unhappy with you. For example, type KO-23.
- The program reads the
kepfile, and tells you the age of KO-23's keps in the
proper window. It will also tell you if you can get good
tracking precision with those keps, or if you should get
- Then it calculates AOS
and LOS times (for the novice: AOS means Acquisition Of
Signal and LOS is Loss Of Signal) If you haven't disabled
flipping, FodTrack also looks into its crystal ball, to
see if the bird will run against your rotator stop on the
next pass. If so, it will tell you after a while that the
antenna will be "flipped" over. If not, it will
be on the "normal" side. If you chose to park
your antennas in the configuration file, then the
"Flipped" or "Normal" display will be
overrun by the word "Parked".
- The AOS, LOS and
flipping calculation takes only a few seconds if you have
a coprocessor, but it can take nearly a minute on slow
non-coprocessor machines. For geosynchronous sats this
calculation is not done, because there may be no AOS or
LOS at all!
- After flipping
determination is complete, the program will start
tracking the bird. Every second, if the computer is fast
enough, the position is updated. If the AOS time is more
than 2 minutes away, no data is sent to the rotator nor
to the radio.
- When the great moment
arrives, two minutes before AOS, the program will start
sending target position data to your rotator, indicating
so in the rotator status display. The two-minute
allowance assures that the rotator has enough time left
to point at the satellite before it comes over the
horizon. At this time, the program will also start
controlling your radio, and showing the Doppler-corrected
frequencies. If the FODTRACK.FRC file does not contain
- for the selected
satellite, then the program will not access the radio,
and will display Doppler correction in PPM (parts per
million). This is useful as a help for manual tuning of
- You may notice that the
last figure of the frequency does not change at the same
time on your radio display and on the FodTrack
indication. This happens because most radios truncate the
frequency, while FodTrack rounds it off. So, 435175.478
KHz would be displayed as 435175.5 by FodTrack, while
most radios would display it as 435175.4.
- If the rotator is not
flipped, azimuth and elevation on the rotator are the
real ones. If the program had to flip the antennas,
azimuth is 180 degrees shifted and elevation starts
backwards from 180 degrees.
- If you selected a
stepsize of zero degrees in the configuration file, then
the program will send the rotator position to the
interface at a rate of up to once every second. In this
case, the rotator will move in fine steps, their size
being given by the dead-band in the interface and the
stepsize of the D/A converter (256 steps). If you
selected a bigger stepsize, FodTrack will freeze the
rotator until the position error is half as big as your
- Then it will move the
rotator a full step in the proper direction. If your
antennas have fairly broad lobes, you can use this
feature to reduce wear and noise. The recommended
stepsize is about half of your antenna beamwidth.
- When the satellite goes
below the horizon, the rotator output is frozen, the
program stops controlling the radio, and calculates
flipping for the next pass, then starts waiting for the
bird to come up again.
- If you selected
parking, the antennas will then be parked. Otherwise,
they will stay in the position the satellite left them,
until the next pass is about to start.
- If you have an Icom or
Kenwood radio, and you specified parking frequencies and
modes in the FODTRACK.FRC file, then your radio will be
parked too. Yaesu radios will return to whatever
frequency they were on before the start of the pass, if
you leave the SAT switch in OFF position.
- At any time except
during AOS-LOS calculation or GPS reading, you can stop
tracking a bird using the s command, or quit using q. If
you press a, the program will go back into automatic
mode, reading the command file and doing whatever it
- While you are tracking
a satellite in manual mode, you can enter the manual
incremental tuning mode. FodTrack will use the bottom bar
on the screen to display the theoretical frequencies at
the satellite, the tuning mode selected, and a list of
- You can use the cursor
keys to increment and decrement the frequencies. The
up/down keys change the frequencies in large steps, while
the left/right keys do the fine tuning. The size of these
steps is definable in the FODTRACK.CFG file.
- There are four tuning
modes: In RX mode, the receiving frequency is tuned. In
TX, it's the transmission frequency (sounds obvious,
doesn't it...?). In DIRECT mode both frequencies are
tuned in step, which is useful for operating linear
transponders that don't invert the passband. Finally,
INVERSE mode tunes the RX and TX frequencies in opposing
sense, for inverting transponder operation like that on
AO-10 and FO-20.
- When entering tuning
mode, it defaults to RX tuning. The SAVE command saves
the modified frequencies into the FODTRACK.FRC file. The
EXIT command exits the tuning mode.
- During manual
incremental tuning the orbital calculation and everything
else continues. The theoretical frequencies are changed
as you touch the proper keys. Every second, the Doppler
shift affecting these frequencies is calculated, and
while the sat is above the horizon, the corrected
frequencies are sent to the radio. So although the
theoretical sat frequencies can be tuned quickly, the
frequencies in the radio are updated only once a second.
This is done because most radios don't support a much
quicker update rate through their control ports.
- When you are first
setting up FodTrack, you will need to fine tune the
frequencies, specially the RX frequencies of the PSK
sats. You can tune them until the data is being properly
decoded and the signal is in the center of the modem's
working range, then SAVE them. You should not need to
retouch this tuning again for considerable time. Do this
adjustment while using reasonably fresh keps, the PC
clock accurate to the second, and preferably near the
start or the end of pass, which is when the Doppler shift
variation speed is minimal.
- This same kind of
tuning can be done for the FSK sats, using the FM
discriminator center meter, but tuning is far less
critical on FSK.
- The manual incremental
tuning mode is also extremely useful on the analog
satellites. You can tune the RX frequency to some clear
spot, then tune your TX to the corresponding uplink
frequency, then fine-tune it while transmitting and
receiving your own echo. After doing this, you can save
the frequencies, and from then on always use the INVERSE
or DIRECT tuning modes.
- Reagardless of Doppler
shift and position inside the sat's passband, your uplink
and downlink will now always agree! This allows for
completely hands-free operation, even on fast-drifting
sats like FO-20... provided the station you are talking
too is also keeping his frequency on the sat constant!
- The Kenwood TS790 is
notorious for an unwelcome "feature": It will
shortly mute the receiver everytime it is commanded to
update the frequency! So every frequency update causes
one or several packets to be lost. To reduce the impact
of this, FodTrack can be configured to send a frequency
update only when the frequency error is more than a
specified value. But the only real solution for this
problem is to modify the radio, eliminating this muting.
- The Yaesu FT-736 also
has its quirks: It is impossible to switch bands in sat
mode via the CAT control, unless you have an optional
band module (or a dummy module), and even in that case
the procedure is a bit tricky. If you have at least one
band module or dummy, you can tell FodTrack about this
good new in the CFG file. FodTrack will then take care of
- If you don't have such
a band module or dummy, then if the radio is in mode B,
FodTrack cannot put it into mode J. A simple workaround
is to manually set mode J into SAT VFO A, and mode B into
SAT VFO B. If you want to track a mode B sat, you then
just have to press the VFO B button before FodTrack
switches the CAT on, and press the VFO A button for mode
- Fortunately this is not
too bad, as presently all the satellites that require
full automatic tracking are mode J.
- There are some special
situations in which both TX and RX are on the same band.
The MIR station is one example of this. The FT-736 cannot
set TX and RX to the same band in SAT mode. FodTrack gets
around this problem by setting the radio in normal
(nonSAT) mode, tuning RX directly, and using the
programmable offset to tune the TX frequency. No special
setup is required, just program the correct frequencies
in the FODTRACK.FRC file. Please be aware that in this
operating configuration the FT-736 cannot use separate
modes for TX and RX, but
- this is usually not
- When using converters
for the bands not covered by your radio, there are
several aspects to be considered. The most common
converters ADD a fixed frequency to your radio's output,
in order to reach the operating frequency.
- In this case, all that
FodTrack must do is calculating the Doppler shift for the
operating frequency, then subtract the converter's local
oscillator frequency and send the result to the radio.
- On the other hand, some
converters use a higher oscillator frequency and SUBTRACT
your radio's frequency to reach the destination. In this
case, the tracking on the radio must be inverted, and
also the MODE (if it is SSB) must be inverted! FodTrack
takes care of these issues, so you must simply do the
following to use converters:
- In the .CFG file, for
each band you will operate through a converter, you must
specify the converter's local oscillator frequency. After
this, you can set up the .FRC file with the real
frequencies and modes. As simple as that! FodTrack will
display the real frequencies during tracking and tuning,
while sending the converted ones to the radio.
- I hope this scheme is
flexible enough to accomodate most (or hopefully all)
needs. If you have some suggestion, don't hesitate to
- The FodTrack
- The program generates
target position data as 8 bits for each azimuth and
elevation, using one of the printer control lines (pin
14) to tell if azimuth or elevation is meant. 0 is az, 1
- The schematic diagram
of the interface is provided as a PCX file. This format
was chosen because in this particular case it gave the
smallest file size among all common formats, when
compressed with PKZIP. The image is about 1700 x 1100
pixels; this seems to be the best compromise between file
size and quality.
- Please refer to the
schematic in ROTORINT.PCX for this explanation:
- A dual D/A converter
(TLC7528 or similiar) is directly connected to the
parallel port. The port's strobe output is wired to the
D/A's chip select input, pin 14 to the output select pin,
and the 8 data bits to inputs 0 to 7.
- The D/A converter is
used in a reversed fashion, with the reference applied to
the outputs, and the output taken from the reference
terminals. This allows using a low-cost current-mode DAC
- The analog outputs are
compared to the rotator position output using
differential amplifiers, the output of this comparison
beeing fed to two window comparators driving the motors.
The value of the (presently) 1M resistors defines the
rotator's dead range, so you can adjust it by modifying
these values. Lower resistance values cause the dead
range to be bigger, reducing wear and tear, but worsening
pointing accuracy. If you have stability problems
- (oscillations), lower
- A switch is provided
which allows disabling the FodTrack interface. When this
switch is ON, the interface will not allow you to move
the rotator with the pushbuttons on the controller. It
will always hold the rotator to the position stored in
the interface. If you move the switch to the OFF
position, you will have full manual control over your
rotator, while the interface still listens to the PC and
updates the D/A's internal registers.
- As you can see, the
loop is closed outside the PC, in hardware. This reduces
the processing load for FodTrack, and eliminates the
possibility that a computer crash may drive your rotator
against its end stop.
- The program has no
means to check if a rotator interface is connected, so
you can start it up without one.
- The interface can be
mounted in a small box. It is connected to the rotator
controller's 8-pin DIN connector, from which also the
power is taken.
- Please note that there
are two standards in common use for the pinout of this
connector. The schematic diagram includes a picture of
the proper pinout.
- On popular demand I'm
now including the printed circuit board design for the
FodTrack interface. This is exactly the same design used
for the interfaces built and sold by AMSAT-CE. The design
is provided in two PCX files: One for the copper side and
one for the component overlay. Just print them out and
make your board, or have it made by some specialized
company. Be careful, because some traces are very close
together. You need accurate etching to avoid shorts
between those traces.
- If you have any trouble
getting it running, the voltages indicated on the
schematic may help you find the problem. But be aware
that most of these voltages are valid ONLY while the
rotator is being properly controlled by the interface, at
the positions noted on the top of the schematic.
- The program provides a
calibration function which allows you to adjust your
rotator pots for correct ranging.
- This sequence is valid
for my interface circuits, and a Yaesu 5400 or 5600
- - Assemble the
interface, set everything up, load the program.
- - Calibrate the
rotator's full scale adjustments according to its manual.
- - Type c to get into
the calibration routine.
- - Enter 255 for both
azimuth and elevation.
- - Calibrate the
rotator's output voltage adjustments to such positions
that the rotator stays just before its end stops (or
limit switches) in both axes.
- - Enter 0 for both
azimuth and elevation.
- - Check that the
rotator turns around completely in both axes, without
running against the limits. If it does run against a
limit, something is wrong...
- - Play around entering
values of your choice, and make sure the rotator reacts
correctly (compare the meters to what FodTrack says).
- Rotor control boxes can be modified with
small relays to enregise the proper switch during rotation.
- Using the
GS-232 or the RC-2800:
- Instead of the FodTrack
rotator interface, you may use the Yaesu GS-232 or the
RC-2800. This allows to use FodTrack with ready made
hardware for those who don't want to build things. But of
course the cost is much higher!
- To use one of these
interfaces, you simply set up the configuration file
accordingly (details are commented in that file), and
connect the interface to the selected serial port.
FodTrack uses only the Wxxx yyy command of the GS-232 and
the A and E commands for the RC-2800. It does not expect
any answer, so you can use a very simple 2-line
- You can use the
original RS232 interfaces, but these are costly. You can
as well use a simple level converter mounted inside a
plug. Several firms offer them at a much lower cost than
the original ones, but it is still much cheaper to build
- You really don't need a
fancy MAX232 here. A simple CMOS chip, powered from 5
Volts, will do the job. Put a 100K resistor between the
RS232 output and the chip's input; that resistor together
with the chip's clamping diodes will make a very nice
RS232 to TTL converter!
- You can power the CMOS
chip from a 78L05 regulator, fed through a few diodes and
a capacitor from the RS232 handshaking lines. FodTrack
will "switch them on" for you! You can put all
these parts into an RS232 connector (even a 9-pin shell
is big enough, if you are careful...), to get a very nice
and cheap control interface.
- Some radios use TRUE
polarity, others need the RS232 signal inverted. Check
the docs of the radio, and use one or two gates of your
- Remember that for
FodTrack you don't need data FROM the radio TO the PC,
but if you want this for some other program, just put the
TTL signal into the PC's RS232 input. I have never seen
any port that does NOT work that way!
- I'm providing the
schematics of the adapters I use in my station. RS232Y.PCX is the version for Yaesu,
which I use on my FT736, while RS232K.PCX is for Kenwood radios. I use
that one for my TS450, and I hope it will run also on the
TS790, but I have not tested this.
- I'm also providing a
schematic for an interface which perhaps could get the
Guiness record for simplicity: just three components!
This circuit does not provide a "reply"
connection for the radio, and it can be used only with
radios that have an input with pull-up, and use inverted
signals. It works perfectly well with FodTrack and the
Yaesu FT736R, and will probably also work with Icom
radios (using another plug, of course...). This circuit
is in RS232SIM.PCX.
- Ready made
- For those who don't
want to assemble their own interfaces, AMSAT-CE can
provide the circuits in ROTORINT.PCX and RS232SIM.PCX
assembled and tested, ready for "plug and
play". Any funds collected go to our CESAR-1
project, a 9600 baud Pacsat. If you are interested in
this deal, write to Carlos Godoy, CE2HI, via any of the
- Mail: AMSAT-CE
- P.O.BOX 803
- VINA DEL MAR
- Fax: +56 32 88
- Cost, for the
combination of the two interfaces, including shipping via
registered airmail, is about US$ 110. Unfortunately
AMSAT-CE cannot charge credit cards. The two interfaces
can be provided separately.
- GPS support:
- If you have a GPS
receiver or another device that can output NMEA-0183
datagrams, you can connect it to a serial port of your PC
and use FodTrack to keep the PC's clock accurately set.
Optionally you may enable a function that gets the
location from the GPS. This should be very attractive for
maritime mobile stations and for anyone who moves his
station around a lot!
- But even if you operate
a typical fixed station, the time setting feature alone
may warrant the purchase of a GPS receiver for many of
- At this stage the GPS
support is still experimental. I need input from you to
implement more features.
- What the GPS feature in
FodTrack does right now is this:
- - Whenever the program
is sent to a satellite, or if you press the "G"
key, FodTrack will read the specified serial port and
wait for up to 6 seconds for the arrival of two
consecutive datagrams of the same type bearing different
time stamps. It will then assume that the latter time
stamp is reasonably fresh, and will set the PC clock to
this time plus a small offset which is there to
compensate for the time interval between the instant the
- GPS fixed the position,
and the moment the datagram actually arrived at the PC.
You can specify this offset in the CFG file. The proper
value depends on your specific GPS receiver, but will
typically be about 1 to 3 seconds.
- - If the position
feature is enabled, then FodTrack will also set the new
geographic coordinates, and it will write the datagram to
a file called FODTRACK.GPS, in order to allow other
programs to make use of this data.
- - During the first and
last minute of each day the GPS access is inhibited. I
did this because the NMEA datagrams sent by most low-cost
GPS receivers do not provide the date. So, by inhibiting
GPS timesetting near the date switch I hope to avoid
setting today's date with tomorrow's time!
- I would very much like
to use an NMEA datagram that contains valid UTC time and
date, not just the position fix timestamp, but it seems
that many low-cost GPS receivers don't support such
- FodTrack presently
understands the GLL, GGA and RMC datagrams. This should
provide compatibility with almost any GPS receiver. If
your's doesn't give any of these, please tell me which
one it produces, so I can add support for it.
- I tested the GPS
function using my Magellan Trailblazer, and I have heard
of several people using it with Garmins.
- There are two different
ways for automatic tracking of multiple satellites.
- The preferred mode is
- Configure your
skeduling program in such a way that it writes a
FODTRACK.CMD file into the FodTrack directory, containing
the name of the satellite to be tracked, exactly as it
appears in the kep file. This CMD file should be written
two or three minutes before the start of the pass, to
give FodTrack enough time to do the crystal ball business
and preset the antennas. The easiest way to write these
command files is simply to copy them from somewhere
- elso into the FodTrack
directory, using a COPY command inside the a batch file
you run at the start of a pass. For example, you can have
a FODTRACK.CMD file in your KO-23 directory, containing
the text "KO-23" (without the quotes, of
course...). Into the BAT file you run at the start, you
put the command COPY C:\SAT\KO-23\FODTRACK.CMD
- After the pass, the
skeduling system should write a CMD file saying NONE, so
- Now you load FodTrack
inside your multitasker. When your satellite skeduler
decides to run a pass, it calls the BAT file, which
copies the proper FODTRACK.CMD into the FODTRACK
directory. When FodTrack reads the file within the next
second, it starts tracking the specified sat. After the
pass, the CMD file contents is changed to
"NONE", and FodTrack goes to idle, waiting for
the next pass.
- FodTrack checks the CMD
file continuously, so it is mandatory to have a disk
caching program like SMARTDRIVE, or some hardware cache.
Otherwise your hard disk will complain. But anyway,
nobody should be working without a cache these days!
- The alternative mode
for automatization is simpler:
- It consists just in
configuring FodTrack for automatic exit after a pass (in
the CFG file), and calling it before each pass specifying
the satellite on the command line. For example, you use
the command FODTRACK KO-23.
- FodTrack will start up,
wait for the specified sat, track it until the end of the
pass, and then quit. The command file is not read in this
- The disadvantage of
this mode is that when FodTrack starts for a pass, it
doesn't know where the rotator is. This eliminates the
possibility of selecting flipping according to the status
from the last pass, which is useful to reduce rotator
wear. In the preferred mode, with flipping and without
parking, this kind of rotator wear reduction works.
- If you switch to manual
mode after starting FodTrack with a sat on the command
line, it will then work in the normal way. If you then
switch into automatic mode, it starts reading the command
file. But if you switch directly from command line mode
into automatic mode, the program will abort, because it
considers the pass finished.
- If you use WISP, you
can tell the event scheduler in GSC to do the command
file business via batch files, as described above. There
is also a program available, called FOD-INIT and written
by CN8HB, which does the glueing job between WISP and
FodTrack. I'm not using WISP myself (don't like Windoze),
so I cannot give detailed instructions on this setup. For
any question about FOD-INIT, refer directly to its
author. He can be contacted on the sats.
- In case of
- If you have any trouble
with FodTrack, tell me, so I can fix the bugs for the
next version. Also I will do my best to act upon any
suggestion for improvement, if reasonable and possible to
- To contact me, send a
message on KO-23, KO-25, UO-22, AO-16 or LO-19. You can
also try through the terrestrial packet net, if my
program shook your satellite antennas to pieces. The
address is [email protected].
- On Internet, you can
reach me at [email protected] Be patient, sometimes I'm
away for several weeks.
- Is there anyone around
who likes to use snailmail? If so, use this address:
- Radio Club
- Casilla 381
- A last word:
- I'm not a
professional programmer, so you are allowed to smile
about my program and me...