Balun LPDA T6 thru to T12 Tennadyne antennas-make your own 3KW rating .

Description

Wind the balun on a 4 inch or 10 cm former, the former can be 1.75 in or 5 cm wide-plastic pipe, etc.

Use good quality flexible– RG8U cable–of course, you can wind the balun into the full cable length if you wish, avoiding any connectors at the tower.

At a minimum make sure your cable extends more than the length of half the boom by at least 1 meter after the balun has been wound.

Wind 4 turns neatly onto the former -leaving a tail of about 7 or 8 inches -20 cm temporarily use cable ties if necessary–continue with another 4 turns on top of the first 4 turns -8 turns in all see pic..

The tail of 7 “-8” is for antenna connection–connect the center conductor to the upper boom & the outer to the lower boom at the front end of the antenna.

If you wish you can also use cable insulators to separate the RG8U a little below the lower element–not strictly necessary. I never use insulators here-never any issue.

Use good strong cable ties every 6 ” /15 cm or so to strap the RG8U to the underside of the lower boom–weather & UV will eventually destroy the best cable tie.

Cable shrink -Denso tape – for waterproofing the cable -crimp connectors are less prone to breaking due to vibration.

Plug the inner ends of the elements if you do not want the antenna to “sing” in the wind

To test your antenna before installing–hang it vertically so the longest element is 10 feet over the ground –well clear of any near field obstacles and do a frequency run.

For more info wescomradio@gmail.com

By

EI0CL

I