I recently took some pictures of the HF ... / 2014-11-17

2014-11-17 I recently took some pictures of the HF ...
I recently took some pictures of the HF dipole antenna in our attic:
Attic dipole center - Koos van den Hout on flickr
Attic dipole center - Center of the 10 meter/20 meter dipole in the attic
Attic dipole ugly balun - Koos van den Hout on flickr
Attic dipole ugly balun - Ugly balun for the 10 meter/20 meter dipole in the attic
The 'real' current balun is ready, but needs different antenna connectors. It does use PL259 connectors but the surrounding weather cover means I can't secure the BNC - PL259 connector I use at the moment. Better cable and connectors are on order.

I also borrowed the antenna analyzer from the radio club and measured this antenna. It turned out the frequencies with the best SWR (1 to 1.1) are below the planned frequencies on both the 10 meter and 20 meter band. It was supposed to be at 28.120 MHz and 14.070 MHz, it turned out somewhere 26.97 MHz and 13.20 MHz. The good news is that means the antenna wires are too long and need shortening. I'll probably do that 'for real' when I have different antenna cable and connectors to use the balun.

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