Co-Phase

[Beetle]

No.

I disagree. You can indeed cut it to any length you want. It just won't work right; maybe not at all. The idea is that you feed the antennas in phase, AND with a proper feedline length to act as an impedance transformer. If you cut both sides to the same length, the two antennas will be in phase, but you'll be looking at a horrendous impedance mismatch.

Your call.

 

[sleepwalker]

so what determines the proper length

 

[W5LZ]

1. Frequency of use.
2. Velocity factor of the feed line..
3. Distance between the two phased antennas.
4. The additional length in each phasing line to be able to reach those two antennas! The electrical length of that coax isn't gonna be the same as the physical distance between antennas, too short. That additional required length should also be electrically a 'null' to keep the phasing correct, typically an electrical 1/2 wave length.

(Keeps getting better and better, doesn't it?)
- 'Doc