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Homebrew Your Own Inductors
Air-dielectric inductors can be made quite easily at home
post 24 Mar 2024
Coils Traps Antennas Links →
Coaxial Traps forMultiband Antennas,the True Equivalent Circuit
Multiband Antenna DesignParallel-resonant circuits calledtraps are widely used to isolate partsof multiband antennas to make theantenna resonant on different fre-quencie
COAX traps
Coax traps are cheap, easy to assemble in a reproducible manner, very rugged, perfect for portable or permanent operation, on dipoles, inverted-V's etc
Coaxial Traps
The Coax trap program computes design parameters for the construction of coaxial traps for HF usage
Coaxial Traps Grid-dip meter method
A trap is a parallel resonant circuit network that can perform either of two functions in an antenna system, depending on whether the traps are resonant at the operating frequency
Coil Design
The coil design is one of the most difficult and important parts of the coilgun
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Multiband Antenna DesignParallel-resonant circuits calledtraps are widely used to isolate partsof multiband antennas to make theantenna resonant on different fre-quencie
Coax traps are cheap, easy to assemble in a reproducible manner, very rugged, perfect for portable or permanent operation, on dipoles, inverted-V's etc
The Coax trap program computes design parameters for the construction of coaxial traps for HF usage
A trap is a parallel resonant circuit network that can perform either of two functions in an antenna system, depending on whether the traps are resonant at the operating frequency
The coil design is one of the most difficult and important parts of the coilgun
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