Tag Archive for Antennas

Unusual (and expensive) HF antennas

2-30 MHz Vertically polarized Conical Monopole Antenna

My recent trip to OKC put me in close proximity to a lot of antennas. Two in particular caught my eye. More info about these and other similar antennas can be found here. . The first antenna is a vertically-polarized conical monopole covering 2-30 MHz. It is omnidirectional and used primarily for NVIS and shorter…

Why not a “smart” autotuner?

rxnb

Three decades ago, every issue of QST had an ad from Palomar Engineers with exactly two products being pushed – a VLF converter and a noise bridge. They looked quite similar in identically-sized bright red housings. I bought the VLF converted and had a lot of fun experimenting with it. As for the noise bridge –…

Godzilla? A full size, 3-element Yagi on 160m

Three workers on the boom

7J4AAL in Japan is now sporting the largest Yagi currently in use on 160 meters – a full-size, 3-element monster atop a rotating 200-ft (60m) tower. The previous Largest 160m Yagi was at OH8X but a winter storm put the tower and antennas on the ground in December 2013. The same tower also supported an…

“Not for sale in the US”

SARK110

I’ve hesitated upgrading from my very old MFJ antenna analyzer due to the fact that other analyzers seem over-priced for what they offer. Finally, from Spain, the SARK-110 – yet unavailable in the US due (I think) to patent issues. Hopefully those matters will get resolved to allow sales here. Features include (from their website):…

Video: Antenna view via quadcopter

494

I recently added a GoPro Hero camera to my DJI Phantom quadcopter and have been having a lot of fun with it. Two co-workers enjoyed test flights with the combo so much that they now also have similar set-ups. A trip to San Antonio this past weekend was too busy to allow me to over-fly…

Two sources of pneumatic antenna launchers

akbiocca

I saw my first pneumatic antenna launcher in use years ago in Stamford, Connecticut. Preparations were being made for Field Day and someone there had a contraption that I later would realize was of the same design as those now available from AKBiocca. The thing worked great, easily getting a line over very tall pine…