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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
1.2 GHz FM Wireless SpyCa

Antenna 23cm 1.2 GHz Links

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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


Linear-loaded-short-dipole-21mhz

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

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

Atu balanced feeder antenna system

Atu balanced feeder antenna system An ATU has the advantage of bringing the feeder-antenna system to resonance, act as a band pass filter both on receive and transmit and a low SWR