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Receiving on Low Bands As I wrote here I moved to Ilmenau in August 2009, so the time of huge space is over. Goodbye to my 300m JA-Beverage, cherrio 280m W6-Beverage. Okay, maybe this is too dramatic... I still have these antennas, but 150km away. From time to time I visit my parents and operate my old station. But what should I do during the weeks or months I'm staying here in my apartment-prison? After some attempts I set up a transmitting antenna for the high bands (30-10m), but I miss the low bands. It is not possible to receive signals on 40/80/160m with this antenna, because there is too much noise from all the electric devices people are using here in the city. Especially during the winter-period when 20m is quiet at 5pm, I'm bored... But these times are over! I built a shielded loop and use it indoor and outdoor (balcony) for receiving. It's quite easy too build and it's student-friendly (just a few €'s). Sure, I'm not able to receive Pacific Ocean or small guns from north America, but I got VE1ZZ on TB several times during the last days and some other DX on 160m. On 80m and 40m I use it as RX-Antenna for my own QSOs. My TX-Antenna on those bands is a sloper from my balcony, impossible for RX.... so I was able to work some JA's on 80 and even PY (got not a single dot on my TX-Ant). If you want to build your own loop, just do it like that: - take 6.3mtr of coaxial cable (quality is not important, use cheapest you can get) - prepair a cross (made of el. installation tube, very light-weight and cheap) of 2 tubes á 2.4m - take a small variable C (I tried several C's, but 500pF are okay) - 2hrs of freetime (includes some breakes for a cigarett and a coffee ;-)) Here are some images how to build and how I use it. I use it with a homemade preamp (simple one, with 2N5109) with good results.
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