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Antenna 70Mhz-Yagis
The Yagis have 12,5-Ohm resistance with match 2xlambda/4 50Ohm coax or 28-Ohm
post 27 Sep 2024
Antenna for UHF VHF Links →
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
150
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
6 elements was chosen, as the boom length is 2m (6.5ft) which keeps it portable, whilst still having good gain
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
>Band 144-146 MHz, gain 11 dB
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
PIC-Keyer This project describes the construction of a real "QRP" keyer with a small microcontroller PIC 16F84, with slightly modified hardware also PIC16F62
Radioassistance Radioassistance E Kenwood Dealer, vendita ricetrasmittenti, antenne, parti di ricambio, elettronica
Conrad Electronic Electronic components online shop in German and Italian