05.02.11

Do you have an OCF-Dipole or an FD-4?

So why are you not QRV on 160m?

"Because my Antenna is only for 80-10m Bands"

So let´s bring it to work on 160m!

Normally the FD-4 or Standard OCF-Dipole has an Balun 1:6 and a dimension of 13,8m and 27,7m for each leg.

So what can we do?

I took  a PVC-Tube with 50mm diameter and bring up 125 windings of 0,75mm² HVK- Standard isolated cable on in. I fixed the windings with glue and took some screws to have a good and safe contact.

i drilled two wholes each side in the tube to fixed the wire.

That gives an Inductivity of about 150 mH. Not critical!

After that i mount  this L, with a rope through the tube, to the short end of the OCF-Dipol(FD-4) and took 10m HVK 0,75mm² to the other end.

So now i started to tune the 10m wire . Messure and cut, messure and cut....

After some test i had a length of about 4-5m. and a Resonanz on 160m.

SWR 1,5 Window from 1800 khz to 1840. Not bad for the first Test.

So what can we do with this kind of Antenna?

CQ 160m Contest 2011 CW

 Band QSOs Pts  Sta Cty
  1,8  232   1226 15  47
Total 232   1226 15  47

Just in a few hours. Amazing!