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Multi cb impedance calculator
With the multi-cb impedance calculator, you can calculate the approximate impedance dimensioning of your pcb / high frequency circuit board
post 04 Feb 2024
Antenna Calculator Links →
AM Loop Antenna Calculator
Below you will find plans to build a three or four foot box loop for the AM broadcast band
Design Your Own Dipoles And Inverted Vees
The formula for these types of antennas vary from about 476/f Mhz to 490/f MHz depending on the band and the height above ground!
Double Extended Zepp NVIS Antenna Calculator
The measurements below are for building a Double Extended Zepp Near Vertical Incident Skywave NVIS Antenna
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Below you will find plans to build a three or four foot box loop for the AM broadcast band
The formula for these types of antennas vary from about 476/f Mhz to 490/f MHz depending on the band and the height above ground!
The measurements below are for building a Double Extended Zepp Near Vertical Incident Skywave NVIS Antenna
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