Together with our local friends I kindly cooperate with Civil Defense and Fire Protection non profit organisations.
My cooperation with ADF is at radio communications level, repeater maintenance, staff training on radio use, etc. during training and prepardness season and net control during fire season.
My good friend Salvador EA3GJO, from his retirement in Leon builds the best hadcrafted baluns available around here. He has some “standard” models and he can tailor your specific custom made unit according to your specific frequency, ratio and power requirements.
He has shared with us some units for testing and they are awesome.
To our request he built for us a special 4:1 unit with the terminals adapted to match a 450 ohm ladder line so that my friend Joan “Cullereta” EA3DJL can connect his antenna tuner to the ladder line, outside his shack, by simply running a short length of coax from the tuner, through the wall, to the ladder line bottom end.
So, if you have a tuner without built in 4:1 toroidal balun, and/or you simply do not want to pass your ladder line through the wall, one of this 4:1 can solve your problem.
There is also the 9:1 unit to use with long wire type antennas, and multiple models of baluns and ununs including full legal output (and more) current baluns to use in your beam.
I use one of these 9:1 unun with a 16,2m wire with excellent results on 30/40/60/80m and reasonable results on the other WARC bands.
Contact Salvador through the email specified at his QRZ profile (login required) for more information on available models, specific requests and ordering information.
We do not have any commercial nor business relationship with Salvador.