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70Mhz-Yagis


The Yagis have 12,5-Ohm resistance with match 2xlambda/4 50Ohm coax or 28-Ohm
post 19 Dec 2021


Antenna for UHF VHF Links

152



8x2 Element Array Antenna For 144 MHz
Front/back ratio was measured with a Drake R4c receiver with VHF converter listening to some strong and weak signals. I found substantially more than 25 dB

144MHz 2m Portable Yagi VHF Beam Antenna
6 elements was chosen, as the boom length is 2m (6.5ft) which keeps it portable, whilst still having good gain

144 MHz 25 Ohm Stacked Yagi
The array works excellent with a very good antenna pattern.The measured SWR of the complete group in the common feeding point is 1,1 beween 144,0 and 144,8 MHz

9 element yagi for 144Mhz
>Band 144-146 MHz, gain 11 dB

A Batwing Antenna
A batwing element with dimensions for a center frequency of 434.5 MHz which should cover 370 to 500 MHz with a VSWR of 1:1.1 or less. All dimensions shown are in inches. Multiply by 2.54 to obtain dimensions centimeters

10 m| 12 m| 15 m|
17 m 20 m| 2 m|
23 cm| 30 m| 40 m
6 m| 70 cm| 80 m| 160 m| 136 khz
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