Hits
AIS Antenna
A careful search in made for the optimum directional AIS receive antenna for a shore station. The result is surprising
post 16 Sep 2024
Antenna for UHF VHF Links →
HB9CV Antenne
I was able to set a maximum standing wave ratio of 1: 1.1 at 144.300 MHz. The HB9CV works really well.
Helix antenna for 2 metre satellite
Construction of the helix antenna is mechanically a little more difficult than a Yagi and requires a reflector behind it to function properly
J Antenne For 2m
A J antenna in fact a ZEPP antenna can be considered as a whole wave radiator with one dipole half (=1/2) folded
150
I was able to set a maximum standing wave ratio of 1: 1.1 at 144.300 MHz. The HB9CV works really well.
Construction of the helix antenna is mechanically a little more difficult than a Yagi and requires a reflector behind it to function properly
A J antenna in fact a ZEPP antenna can be considered as a whole wave radiator with one dipole half (=1/2) folded
Ferrite Shop Ferrite-shop on-line shop, cable clamps,toroids, cable cores, technic,ferrite material choice
Amateur radio kits by Kanga US
50MHz to 28MHz RX Converter The concept of the rx converter is quite simple and nothing really new. the local oscillator is a standard colpitts crystal oscillator producing the 22mhz lo signal