My guess is the hardline will work fine without any matching, most Pi nets will match it fine. I also don't like toroids or baluns on AM, high power (or even medium power) AM tends to overload and/or cook anything like traps or baluns in short order. Many antennas rated for 2kw plus pep crap out with 100 watts of AM on them....
I blew out traps in a trapped dipole and in a vertical antenna with a DX100 (100 watts out). Brett N2DTS > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Pieter Gerlach > Sent: Friday, December 29, 2006 7:26 AM > To: [email protected] > Subject: [AMRadio] Thank You and Toroidal transformers > > Greetings Amiable AMers, > > I am a real neophyte in HAM and AM radio but i. at least > recognise, that this is the group that leads the pack when it > comes to genuine knowledge and practical experience. As the > New Year approaches, i want to express my gratitude for the > wealth of information which has come my way thanks to you. As > i am a farmer who still works the land with horses, i > appreciate the importance in keeping the old, tried and > time-tested ways alive; not just for nostalgia's sake but for > the time when radios and the written word might be one of the > sole sources of communication. If one of those $10,000 > digital voodoo boxes breaks down there are only a few select > experts that can even diagnose, much less fix the problem. I > take off my hat to expose my bald head to all of you!! > > As an added favour could anyone tell me what sort of toroidal > core i would need to transform 75 to 50 0hms. I was given a > large quantity of CATV hard-line and read that it would be > well to match the impedance to the antenna and the > transmitter. Or do you think the Pi-network in the P.A. would > be able to match the 75 ohm? I would at leat like to know > which cores from Amidon would be the right ones in case i > just want to construct a few transformers for experience > sake. Thanks so much for any help you can give me. > > Happy New Year to each and everyone! > Pieter VE1PPG > ______________________________________________________________ > AMRadio mailing list > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Partner Website: http://www.amfone.net > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > ______________________________________________________________ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected]
