My first balun that I built is a standard 4:1 voltage balun for 5 watts or less. It works great but there are times when one needs to run a bit of QRO, so I decided to build another one.
This is W1CG balun kit. For more info see http://www.njqrp.org/balun/. The enclosure and hardware came from a local store. The "Kit" is no longer available but parts shouldn't be too hard to come by. Download the manual and build one: http://www.njqrp.org/balun/Balun%20Manual%20-%20final.pdf
The instructions for this kit are extremely clear and detailed. The W1CG balun is configured as a current balun and should handle up to 100 watts.
The 200 ohm resistor is soldered temporarily for testing purposes.
An old MFJ SWR Analyzer comes in handy for testing.
The toroids are bundled up for installation into the enclosure.
A few dabs of RTV silicon keeps the bundled toroids in place in the enclosure.
Here is the final installation connected to 450 ohm ladder line that feeds a 40 foot high, 44 foot long, centre fed dipole. The other end of the coax goes to an antenna tuner. I am able to work all bands from 80 to 10 meters.
