I have an Argonaut 509. My antenna is a full wave horizontal loop about 12 to 18 ft above ground. What matching device between the loop and the rig will have the least loss while getting the most sig
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Mon, 05 May 2008 11:10:20 -0600
A KW sized link coupled tuner. 73, Jerry, K0CQ _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
I also have a 230 ft horizontal loop up at 30 feet..and use it from 80 thru 10 meters. Typically I get excellent..nice and strong..signal reports. I don't have an amp in the place but can hold my own
It is not possible to say due to lack of data. However, as a first guess, an L network is a good candidate to provide the least match loss. You have at least two possible configurations of the two re
Bill, Jerry was right about a high powered tuner should have lowest losses. From a circuit standpoint, a two component floating L network would work and have lower loss than a three component Tee net
If I read every thing and understood what I have read and what Gerald just stated, it would be a CURRENT BALUN. What is your impedance at the feed point at the antenna? Keep The Faith, Jim K9TF/WA9YS
Well, that is a good question. I do have one of those MFJ meters and I will measure it at the feedpoint. However I think the antenna resonates around 2.8 Mhz. I think I will have to adjust some lengt
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 07 May 2008 08:50:49 -0600
And if you match it the same with a low loss tuner, it will work just fine for QRP. The longer length should give you some gain over an 80 meter resonant dipole. You could, but any antenna with much
Would the problem with the torrid be that the core might saturate and that is where the loss would come from? Bill KB1LG will been And if you match it the same with a low loss tuner, it will work jus
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 07 May 2008 09:30:30 -0600
Ferrite always has some loss. Its the trade off between high permeability (and hence compact transformer or balun) and loss. Driven to saturation, the loss (and harmonic distortion) increases very mu
Then the question would be, if I selected the right materials (torrid and wire) and a proper design (number of turns, etc.) then would this be the least loss matching device? If yes, what material an
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 07 May 2008 10:25:16 -0600
Go large on the core and wire. If it doesn't get hot with a KW going through, the losses will be small. But it won't take care of the reactance from being away from the resonant frequency of the ante
You see, this is what ham radio is, or at least used to be, about. The variables are so broad that there is no simple answer. So, the ham should build an 'L' network and try it and make measurements.
150 ohms at resonance you say thats 3:1 Thats a tuff one to find unless Palomar Engineering or Amidon still making made to order specialty baluns. A 4:1 would be about 25% less effecient or power los
Bill.... Cebik writes very extensively on these matters. Much of his work can be found on the web. You will find just what you want, and many practical designs, in his work. I suggest you look into h
Cebik has designs for Baluns (and Ununs) with many different impedance ratios. Palomar Engineering or Amidon still making made to order specialty baluns. A 4:1 would be about 25% less effecient or po
Unfortunately, L. B. Cebik is now a silent key (as of April). Troy, W6HV Cebik has designs for Baluns (and Ununs) with many different impedance ratios. Palomar Engineering or Amidon still making made
Fortunately, all his work is still available at www.cebik.com. You just need to create a free login ID/PW and it looks like it always did. Regards, Joel Joel R. Hallas, W1ZR --Original Message-- From
Jerry Sevick's books cover how to combine baluns to get "non standard" ratios, or you can get a balun kit from The Wireman, or Palomar, or Amidon, and change the tapping as per Sevick's balun designs
Lowest loss matching an antenna has to be the antenna that does not need a metal composite balun or a tuner and use only Type "N" connectors through out. With that said, and saw some one say use sing