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Gosh, is my face pink.
You all were right when you wrote to use a balun and 75 ohm coax, not twinax line to run to the input of the radio. The ring connector on the OEM dipole is a copy-protection throwoff. The true connection is that one leg is _grounded_ to the sleeve/barrel/chassi, and the other is connected to the tip terminal. I determined this with a sewing pin to penetrate the dipole insulation and an ohmmeter. But Don Foreman is instructing me in how to rewind my 300:75 ohm balun to 75:75 ohms for the open six element triple drive antenna so my face isn't red. That is, I am learning something. Later, in my shop, I will install the balun core to the Wizard board and go back to the twinax, so that the Wizard can accept a the big antenna the way it is now, but with the plug in all the way instead of just part way, or a new flexible open dipole that is a true balanced dipole and doesn't have one leg grounded. It can be made from a bit of twinax, or the existing dipole can simply be soldered to a fresh TRS connector. Do any of you know a software patch to get lower than 88 MHz on the Wizard? I'd like to listen to ATC. Doug |
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Wizard Radio in Seven Corners, VA, to receive WHFS in Annapolis | Antenna |