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Levy antenna covering with 14 to 28 MHz
One of my best Levy antenna boxes covering from 14 to 28 MHz with a single self and without switching. Very nice to use
post 12 Sep 2024
Antenna Transmatch tuner Links →
Levy antenna covering with 14 to 28 MHz
One of my best Levy antenna boxes covering from 14 to 28 MHz with a single self and without switching. Very nice to use
Matching 50 ohm to 75 ohm
Most signal generators have an output impedance of 50Ω. To align an FM tuner or measure its performance, it's best to match this to the tuner's 75Ω input impedance
Modifications to the Single Coil Z Match for 1.8 MHz
The original Z Match circuit modified to include 1.8 MHz. The addition of three fixed capacitors and a 4 position switch gives the whole load resistance range at 1.8MHz
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One of my best Levy antenna boxes covering from 14 to 28 MHz with a single self and without switching. Very nice to use
Most signal generators have an output impedance of 50Ω. To align an FM tuner or measure its performance, it's best to match this to the tuner's 75Ω input impedance
The original Z Match circuit modified to include 1.8 MHz. The addition of three fixed capacitors and a 4 position switch gives the whole load resistance range at 1.8MHz
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