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The FD4 FD3 windom antenna
The 4-band Fritzel model FD4 is a special version of a Windom antenna. It is a half-wave long on the lowest frequency
post 08 Jun 2024
Antenna Multibands Links →
15 Element Wire Log-Periodic 7 MHz - 30MHz TITANEX DLPD-15
Feeding with just a single coax cable for all seven bands 50 hm Loss-free linear loading feeding on 10MHz, full-size rotary dipole on 7MHz
40-10 Meter Antennas
All three dipoles were fed from a single 1:1 balun
6 band windom anten 80-40-20-17-12-10m, TA1CD
Our antenna will serve us for a long time if we isolate these parts from the external environment with hot silicone or similar materials after soldering the connections in honey. We can use our antenna in all hf bands except 160m, 30m and 15m
A dipole portable
Configured as a dipole, the ATX whips appeared not to be long enough.A loaded dipole is more efficient if the loading coil is closer to the top of the antenna
T2FD antenna Tilted Terminated Folded Dipole
FD4 G5RV and Automatic Antenna Tuners
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Feeding with just a single coax cable for all seven bands 50 hm Loss-free linear loading feeding on 10MHz, full-size rotary dipole on 7MHz
All three dipoles were fed from a single 1:1 balun
Our antenna will serve us for a long time if we isolate these parts from the external environment with hot silicone or similar materials after soldering the connections in honey. We can use our antenna in all hf bands except 160m, 30m and 15m
Configured as a dipole, the ATX whips appeared not to be long enough.A loaded dipole is more efficient if the loading coil is closer to the top of the antenna
FD4 G5RV and Automatic Antenna Tuners
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground