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Bazooka-Antenna Calculator
Antenna Bazooka one of its characteristics, are: easy installation, and very silent especially in the low bands
post 23 May 2024
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Helix antenna design and construction details
Design frequency MHz, Number of turns ,Turn spacing, wavelengths
Inductance of a Straight Wire, One End Grounded
Any length of wire has some inductance, however, at low frequencies, 1-30 MHz, the added effect of this inductance is usually minimum
J-Pole Antenna Calculator
If the antenna is to be placed outside, do not use brass, photo model designed for 2.45 GHz. A capacitor of 0.8 pF and it would be perfectly matched to 50ohm
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Design frequency MHz, Number of turns ,Turn spacing, wavelengths
Any length of wire has some inductance, however, at low frequencies, 1-30 MHz, the added effect of this inductance is usually minimum
If the antenna is to be placed outside, do not use brass, photo model designed for 2.45 GHz. A capacitor of 0.8 pF and it would be perfectly matched to 50ohm
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