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On a cophase setup, I believe you are supposed to use 75 ohm coax. Like RG 59 - not RG 58.
That is supposed to be used between the 'tee' and the antennas. If I'm also mistaken, then the length of the coax from the 'tee' to the radio must be 18 ft. The distance between the two antennas is supposed to be a 1/4 wavelength between each other - or appoximately 9 ft.

But I really can't say. That setup is usually used for diesel rigs. Most passenger cars/trucks can't use it because they don't have the dimensional width requirement of 9 ft apart. I never had to set one up. What were you going to put it on?

[QUOTE="Robb, post: 148904, member: 8446"] On a cophase setup, I believe you are supposed to use 75 ohm coax. Like RG 59 - not RG 58. That is supposed to be used between the 'tee' and the antennas. If I'm also mistaken, then the length of the coax from the 'tee' to the radio must be 18 ft. The distance between the two antennas is supposed to be a 1/4 wavelength between each other - or appoximately 9 ft. But I really can't say. That setup is usually used for diesel rigs. Most passenger cars/trucks can't use it because they don't have the dimensional width requirement of 9 ft apart. I never had to set one up. What were you going to put it on? [/QUOTE]

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