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Antenna tuner monobande 28/30 MHz
10 MHz single band, this box operates in autotransfo. Very simple to make and use since there is only one CV either. The permissible power is greater than 200 watts
post 12 Sep 2024
Antenna Transmatch tuner Links →
Semplice accordatore per swl
Il segnale reso disponibile alla presa sulla bobina L1, a causa del numero variabile che delle spire al momento ci sono, col variabile C1 costituisce un semplice circuito accordato L/C
SGC Smartuner with balanced dipole antenna
The SGC-230 'Smartuner' is an automatically tuned/L-network. 1.6 MHz - 30 MHz SGC-230 is nominally rated for 200 W PEP and is therefore ideal for use with typical 100 W HF transceivers
Super Tee Antenna Tuner
Leature of this tuner is that the low side of the tuner is raised above ground, allowing the tuner to be used with a balanced line
Switchted indutor L match tunner
Sixth inductor of 16 uH and another switch could be added for a total of 31.5 uH which would allow operation on 160 meters too if needed
The NorCal BLT Tuner
The circuit also is an absorptive bridge, which means that your transmitter sees a 50 ohm load as you are tuning up
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Il segnale reso disponibile alla presa sulla bobina L1, a causa del numero variabile che delle spire al momento ci sono, col variabile C1 costituisce un semplice circuito accordato L/C
The SGC-230 'Smartuner' is an automatically tuned/L-network. 1.6 MHz - 30 MHz SGC-230 is nominally rated for 200 W PEP and is therefore ideal for use with typical 100 W HF transceivers
Leature of this tuner is that the low side of the tuner is raised above ground, allowing the tuner to be used with a balanced line
Sixth inductor of 16 uH and another switch could be added for a total of 31.5 uH which would allow operation on 160 meters too if needed
The circuit also is an absorptive bridge, which means that your transmitter sees a 50 ohm load as you are tuning up
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