Jay, nice to say you HI again!
I had really fun looking into you site...hihihi!
Thanks for the advice, we will try it as soon as we climb on the roof!
We have MFJ bridge, i believe it's not gonna be a matter...
Ok, i give up with that stuff and start to consider your trick!
Let me ask you 2 more questions:
in this new setup, where is the feedpoint of the loop?
Just asking because we always studied the gamma match solution, and i think
the feedpoint is different...
where am I going to solde the external conductor (ground) of the coax on the
loop?
Thanks again, Alex.
> Alex,
>
> Hi again,
>
> 1. .25WL of 70 ohm RG11 coax. Make sure you consider the velocity
> factor of the coax when you cut it to length.
> If you use RG11 with a VF of .667, then 11 feet is approximately the
> correct length. You can cut it a little long, put on a PL259 on one
> end and use an SWR bridge (MFJ259 works well) You will find a dip in
> impeadance. Trim until you move the dip to 14.15 Mhz. The dip will
> be very broad and cover the whole band well. Then put the other end at
> the feedpoint of the loop. Discard the gamma match stuff. Coil the
> coax so it is in a linear coil. Use a PVC form like a 5 inch PVC pipe to
> create the balun.
>
> 2. Gamma match, These are a little tricky to get to work with just
> wires. Most require a capacitor in series with the gamma wire.
> Forget it and use the coax trick to match your loop.
>
> Jay
|