Transformer 3:1 (12 turns : 4 turns) 1 inch core - material 77
900ohms load resistor- watter proof
Transformer is built inside PVC tube. F female connector is used
F conector is used along RGC-59 (75ohm) coax cable
Transformer mounted on the element - Antenna pick-up direction
Back of the anetnna - 900ohm resitor
900ohm resistor is made by 2 X 1800Ohm (1W) carbon resitors in parallel
Antenna mounted prior to installation. Antenna dimensions are 5 X 5 meters (15x15 feet)
The square is wired using regular 1mm2 wire with connectors at each end.
Coax cable wired and tapped
Old friend Adilson at torre work. 68yrs old ! Antenna is mounted between a stack of 2 X 7elem yagi (10m long booms)
Distance between the yagis are 6meters (18 feet). Flag is about 15meters (45feet) from ground
Antenna edge
Here we go!
Closer view. Just below the center there is a choke (just a little bit of it is seen on the photo)
This a choke made with 35 turns of RG174 coax cable over a 2 inches OD material #31 core. Conectors used are "F" soldering type. Choque is installed in the shack's distribution shaft.
This is the front-end saver box. It short-cuts the RX-Flag when transmitting to avoid damage on the transceiver's front-end. The two relays are conventional 5VCC relays wired in series. 13.8 V are applied to them which makes the switching faster hopefuly
This is the choke I used in the feedline when it starts to become vertical up on the tower. It is made with about 12 turns of coax cable RG-59 in a 2 inches OD #61 or #77 Material. "F" connectors are again sused.
This is the shaft where I installed the DXE amplifier as well the FE saver, the choke and the BC rejection filter. Installation becomes combersome. Lots happen when you go from/to receiving.
Command panel! Here the DXE switching box (TVSU-1) along with the controls to turn DXE amplifier on/off . It makes the necessary switching to go from/to RX. I do not use DXE TVSU-1 fully once no timing features are switched on. No need so far.
