|At the shack of PE9DX|
So I started creating with some help from the e-mail PA3FYM wrote to PE9DX. Some photos from Johan helped me as well. I made the 1:6,25 transformer and the 1:1 transformer. Then I had other interests and things and forgot the whole project actually.
When I discussed some antenna matters with PD1RP Peter on the PA6AA contest location we saw a big fence just behind the house, I suggested we should try it as a beverage to increase our receive on 160m. It could be a good idea. At least it would be a great experiment...I remembered I still have these transformers around somewere. So, continue with the experiment would be interesting.
|Simplified drawing of winding a ferrite bead|
beyond my theoretical ability. But in fact the outcome is that a transformer 1:6,25 on the beverage side + common mode choke and a 1:1 transformer at the other end of the coax in the shack should do the trick with a 1m high fence wire. The 1:6,25 transformer is made with 2 BN-73-202 ferrite beads. 2 windings at the receiver side and 5 windings at the beverage side. Another trick would be to keep enough wire at the 2 winding site and twist it then do 1 winding through another ferrite bead. Coax should be wind through a large ferrite ring before you connect it to the transformer. One side of the 5 windings can be connected to the beverage or in my case the fence wire. The other "earth" side can be connected to a ground rod and some wire radials on the ground. At the shack you connect the 1:1 tranformer made from a BN-73-202 with 4 windings on both sides. Connect it to the coax and at the receiver side try which of the 2 wires connected to earth/receiver give best SNR results, you can try to listen or see in a spectrum waterfall. Switch the wires to see best results.
|The finished creation...|
I made WSPR comparisations at night were I used my inv-V on the IC-706 and the beverage on the FT-817. The inv-V is far better. If any reader does know what is wrong? In theory this setup should work but it doesn't...
|Actually 18 spots on the beverage, O25KFP is wrong spot|