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1.2 GHz FM Wireless SpyCa
The camera uses a CMOS sensor, like the AM camera, which work ok with adequate lighting
post 28 Apr 2024
Antenna 23cm 1.2 GHz Links →
A Homebrew Yagi for 1296 MHz DX
As none of the versions satisfied me I could not find a fast solution and started my own design by building countless prototypes and making gain measurements in free space
An interdigital filter for the 23cm band
Build a band-filter for the 23cm band, the following drawing of an nterdigital filter
Analysis of the G3LTF Dual Band Feed for 23cm and 13cm
The feed is a combination of two proven designs, an EIA dual-dipole feed for 23 cm
Antenna a pannello per i 24cm - 1240
Antenna per la banda ATV dei 1240 MHz la struttura e' basata su 3 pannelli disposti a 120° tra loro
Antenna SBFA Short Back Fire Antenna
Si tratta di una sorta di parabola per la banda 1200 MHz 23 cm e 2400 MHz 13cm
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As none of the versions satisfied me I could not find a fast solution and started my own design by building countless prototypes and making gain measurements in free space
Build a band-filter for the 23cm band, the following drawing of an nterdigital filter
The feed is a combination of two proven designs, an EIA dual-dipole feed for 23 cm
Antenna per la banda ATV dei 1240 MHz la struttura e' basata su 3 pannelli disposti a 120° tra loro
Si tratta di una sorta di parabola per la banda 1200 MHz 23 cm e 2400 MHz 13cm
Linear loaded short dipole 21Mhz For my amateur radio activities on the HF bands I only have a 3.6 m wide balcony available for antennas. After some study I decided to experiment with a shortened dipole for the 15 m band
Rx antennas 4Square Rx Vertical Array My frequency design of 1.825 MHz a 90 degrees line would be 33,70 metersinstead of the previously calculated 33,27 m
A simple SWR Meter is to be used at HF An SWR meter provides information about how well matched is your antenna with the transmitter and how well power is being radiated