My projects

1. All Band HF Air Core 1:1 Choke Balun
2. Installing a Roofing filter in an Icom Ic 765

3. BPT mod Icom Ic 765

 

All Band HF Air Core 1:1 Choke Balun

I have caused some problems on the TV by my next door neighbor. So I needed to do something, and I desided to construct a All Band HF Air Core 1:1 Choke Balun. Afterbuilding and installing the Air Core 1:1 Choke Balun there no TVI anymore.

I took a Ø 12,5 cm PVC drainpipe and 15 meters coax. I used 6 meters coax on the drainpipe and the rest is going towards my shack.

 

 

 

 

 

 

 

 

 

 

 

The Air Core 1:1 Choke Balun is now under the beam.

 

 I allso made one for my trapdipole.

 

Installing a Roofing filter in an Icom Ic 765

My radio before the roofing filter was installed.

 

I bought this filter directly by InRad in the USA.

 

The roofing filter in in my Icom Ic 765.

 

 

The filter is installed by just three wires and a incomming and outgoing coaxcable.

This modification has been done by Frits PA3FYS.