Month: November 2014

Autumn Sunshine!

Saturday was a pleasant sunny day and with band conditions being in such good shape, I decided to do a few hours operating. Again, using the end fed half wave on 10m and 12m. Signals were good and it was easy to work the USA, United Arab Emirates, Puerto Rico, Madagascar, Canada, and Guatemala on 28MHz with a simple setup and 100w. Once the sun got a bit low, it did get a bit chilly though! 🙂

The portable setup with the Icom IC-7200

The portable setup with the Icom IC-7200

Working a few on 10m (28MHz) with a half wave vertical

28MHz has been in good shape recently, so I wanted to go out portable and try my end fed half wave parallel tuned circuit coupler as I have not tried it on 10m before. The band was in good shape (unlike the weather) and it seemed to work well. I managed to work some good DX whilst I was there, the log can be seen below.

November 2014 10m log

I also took a little video of me working VA3AQB – Alan in Canada. The coupler seemed to work well on 10m and with a bit more bandwidth than other bands, perhaps because very little capacitance was needed. I’m enjoying making the most of the higher bands whilst they are open! John.

Loaded Quarter Wave Antenna on Topband

We went out for some portable operating today, as the weather was nice. Our club has a topband net each Saturday at 2pm and I wanted to try an antenna for the upcoming 160m AFS Club Calls contest. Using Dave M0TAZ’s 18m spiderbeam fibreglass pole as a loaded quarter wave, with an inductor (340μH) towards the top of the antenna. It makes it all a bit critical having the inductor so high, but the big advantage is that the bottom 15.5 metres has a lot of current in it, leaving only the 2.5 metres above it at a high impedance, making a better radiator. Ground was provided by a chicken wire fence, which I have used many times before with good results.

Below is a short video showing the antenna first on 24MHz where Dave is working Bahrain where the vertical was set up close to a ⅝ wave, then afterwards, it’s fully extended with the loading coil 15.5 metres up, making it a loaded ¼ wave for 160m. The antenna was resonant at 1830kHz, a bit low, so the ATU was used. I calculated for 1900kHz, so I guess 70kHz off isn’t bad! It would be easy enough to fine tune it. Lovely day for it, a bit breezy towards the end though!

M0UKD Amateur Radio Station Information Page © 2007-2017.