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Single layer air core inductor calculator
The calculation is based on the classic Wheeler's formula for single-layer inductance
post 29 Sep 2024
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EZNEC antenna software
EZNEC v. 6.0 programs function on Windows XP(SP3) and later Windows operating systems, 32 or 64 bit
Folded dipole antenna input impedance calculator
If you play with the numbers, and get the input impedance down to 200ohms, you'll need a 4:1 balun to feed it from 50 ohm coax
Folded Dipole Calculator
The impedance of this antenna is around 300 ohm, so you may want to use a transformer or a 1/4 long piece of 120 ohm coaxial cable to match this impedance to 50 ohm
Impedance Transformation with Quarter-Wave Lines
The input impedance of a line an odd multiple of 1/4 long is
Inductive Reactance Calculator
An online inductive reactance calculator: write frequency, inductance
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EZNEC v. 6.0 programs function on Windows XP(SP3) and later Windows operating systems, 32 or 64 bit
If you play with the numbers, and get the input impedance down to 200ohms, you'll need a 4:1 balun to feed it from 50 ohm coax
The impedance of this antenna is around 300 ohm, so you may want to use a transformer or a 1/4 long piece of 120 ohm coaxial cable to match this impedance to 50 ohm
The input impedance of a line an odd multiple of 1/4 long is
An online inductive reactance calculator: write frequency, inductance
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
Interface-for-digital-broadcasts-with-integrated-audio 4-port HUB, with a TUSB2046. With port 1 of the HUB we drive the FT232RL; with port 2 the PCM2904, furthermore, we decided to leave ports 3 and 4 free