ON3JT » Antennas

I’m still alive and kicking sometimes

Joost — Sat, 06 Feb 2010 14:27:11 +0000

Hello World, my last entry was from february last year (exact one year ago) and then everything went quiet. What has happened since? We sold our appartment and bought a house with a small garden. Early March we were alerted by friends that there was a house for sale in their street. We know about 5 families in that [...]

I’m still alive and kicking sometimes is a blogpost from: ON3JT

Build a simple magnetic loop antenna.

Joost — Sat, 07 Feb 2009 08:19:28 +0000

This article is a reprint from my original article published in 2004. I don’t use the antenna anymore (collecting dust in the basement) but the article will stay here for informational purposes. I live in an appartment and don’t have the space to put up a large antenna for my Kenwood R1000 receiver. I knew the excistance [...]

Build a simple magnetic loop antenna. is a blogpost from: ON3JT

Build a lowcost yagi antenna for PMR446

Joost — Fri, 06 Feb 2009 18:45:46 +0000

This post is taken from my old website. I’m still dismantling that site. What is PMR446 anyway ? PMR446 stands for Personal Mobile Radio and is a license free radio in the 446 MHz UHF band. That is about 6 Mhz above the 70cm amateur radio band. There are 8 channels starting at 446.00625 MHz and ending [...]

Build a lowcost yagi antenna for PMR446 is a blogpost from: ON3JT

Bought myself a Christmas gift : a new Diamond W735 40/80m wire antenna

Joost — Thu, 25 Dec 2008 13:46:33 +0000

Last sunday I attended a hamfest in Bladel, The Netherlands, organised by PI4KAR. From my qth it is a one hour drive to one of the niciest and last hamfests of the year. I had no special needs to look out for but after a while I stumbled on a Diamond W735 antenna. The W [...]

Bought myself a Christmas gift : a new Diamond W735 40/80m wire antenna is a blogpost from: ON3JT

Short 40m dipole antenna, part 2

Joost — Sun, 04 May 2008 17:57:09 +0000

It was a long weekend and the weather was fine. Sunny and warm. Time to test the 40m antenna. Note for myself : build or buy an antenna analyzer. Try not to dismantle the whole shack for antenna testing again. First thing I did at my parents is to solder all amp connections. Then assembled everything together [...]

Short 40m dipole antenna, part 2 is a blogpost from: ON3JT

Short 40m dipole antenna, part 1

Joost — Thu, 01 May 2008 09:42:25 +0000

With my vertical antenna I can listen to 40 and 80 meters, but we all know that is not the best setup. I could transmit with it by using an antennatuner. Using a tuner near the transceiver with a coax fed too short antenna is not the solution. Losses are building up in the tuner and [...]

Short 40m dipole antenna, part 1 is a blogpost from: ON3JT

My homebrew vertical multiband hf antenna

Joost — Tue, 22 Apr 2008 17:32:51 +0000

First I tried to build a Cobwebb antenna. It is a small antenna and rather easy to build. I used cheap fishing rods, costing 4 to 5 euro each, from a known sports hardware shop. The funny thing was when I asked the sales person if the rods contain carbon fibers he mentioned that I’m not [...]

My homebrew vertical multiband hf antenna is a blogpost from: ON3JT

Putting the multiband HF antenna back in it’s original position

Joost — Sat, 29 Mar 2008 17:38:58 +0000

My homebrew HF multiband antenna tipped over during a storm in december 2007. Not a real surprise because the mount was too small to handle the antenna, despite the weight of 8 concrete tiles. I remember that during that evening I was listening to some PSK31 signals on 20m and suddenly they disappeared. A quick [...]

Putting the multiband HF antenna back in it’s original position is a blogpost from: ON3JT

Cantenna for the 23cm ATV band

Joost — Mon, 24 Mar 2008 10:13:56 +0000

A cantenna is a directional waveguide antenna for long-range Wi-Fi used to increase the range of (or snoop on) a wireless network. Although the original design was based on a Pringles potato chip can, a cantenna can be made from various cans/bottles. These include antennas on both the ground and antennas heightened by means of [...]

Cantenna for the 23cm ATV band is a blogpost from: ON3JT

Repair a Diamond X200 VHF/UHF antenna

Joost — Sun, 23 Mar 2008 21:12:13 +0000

I bought my Diamond X200n antenna on a local ham fleamarket in october 2006. It was brand new and never used before. The antenna was mounted on the first of august. There is about 21m of H500 coax between the transceiver and the antenna. The antenna performs well on 70cm with a very low SWR curve. [...]

Repair a Diamond X200 VHF/UHF antenna is a blogpost from: ON3JT