Amateur radio station of Zante Island Greece
REMOTE CONTROLLED HF-VHF-UHF STATION
leaving on the island of Zante (Zakynhos KM07KS) that
unfortunately we have the west direction completely close due to
the high mountains from North to South that cover all the West
direction from 180 deg. to 360 deg. For that reason I have
constructed my first remote controlled set-up in 1984 with a Kenwood
TS430s and with 16 digits DTMF decoder completely home made. With
the 16 digits I operated the HF rig , I turned the antenna
(TH6DXX) I switched from dipoles to beam and all the other
operations of the TS430s.
the help of my good friend Laurent F6DEX I am using the fine
program TRX-MNGR that with the packet radio commands I can make
everything to the remote site HF rig. Also with this project I
can turn my antenna at the remote site. To switch the antenna
switch from dipoles to beam and to open and close the rigs , the
PTT etc , I am using a DTMF decoder with 8 digits from the INTUITIVE CIRCUITS,
LLC http://www.icircuits.com model DTMF-8.The
most important thing in the program is that with a click on the
dx spot from cluster in the master computer at QTH the slave at
the remote going immediately on the QRG and mode and of course
with an other click the qso i.e. already in the logbook .In my
case I am using the Yaesu FT767 gx with the modules of 6m,2m and
70 cm. Of course any other rig is Ok as you can see at the F6DEX
program (Parameters > setup > transceiver). Now the set-up
is at the top of a mountain in a height of 550m a.s.l. and around
has only the sea. Now all the amateurs around the area of about
100 km can access the remote site station and operate with this
big gun on HF with few watts on UHF even with a handie talkie!
controlled your station from your QTH you need at home :
- A COMPUTER
and a VHF/UHF rig.
Computer configuration at QTH : Parameters
> Preferences > Terminal -- control
enabled and Master
The program that doing this job is the F6DEX trx-mngr .
remote site you need : (see
block diagram above)
rig that take all the commands from the qth VHF/UHF rig ,with
packets commands and the UHF rig receive also the audio from QTH
to be transmitted on the HF. The VHF section is all the time
transmitted the audio from the HF rig.
- A TNC
(either TNC2 or PK232mbx).The PK 232mbx going on enable mode
automatically by the program.
- A computer with the program of F6DEX
(trx-mngr) that must be configured at the
remote site in this way:Parameters
> Preferences > terminal -- control enabled and slave
(for the Yaesu or Icom or Kenwood transceivers).
- The HF rig with the capability to go on
6m,2m and 70cm.The PTT is enabled by a COR (carrier operated
relay) or via the VOX. The COR is activated from the squelch of
the UHF rig and with a circuit with a transistor and a small
relay the PTT goes on all the time that the UHF rig receives a
signal. The audio output of the HF rig going to the mic input of
the VHF rig with the PTT always On. In this case we can use the
Phone patch in and out if the rig has this option.
The linears HF (broadband)
6m,2m,70 cm with the relative power supply
The antenna switch is used (controlled by the DTMF
decoder) to switch between the 160,80,40m dipoles to the beam for
the highest HF bands.
The DTMF takes its audio from the UHF rig and decodes
up to 8 digits. It is used with the relative relays for switch on
and off all the setup (except of the UHF/VHF rig) to
switch on/off the operation of the PTT (for non authorized
operators) to switch the antenna switch from dipoles to beam, and
the linears (optional).
If you want ,you can use a separate vhf rig on both
sites to send the packets commands and the DTMF tones.
With the DTMF you can also rotate the antenna at the
remote site from your QTH.
Special thanks to Laurent
F6DEX for the help and the patient and to
the remote cotrolled testers George (SV8RX) and Nick (SV3KH).
Enjoy the project and have a lot of DX!....73 de SV8CS
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