Co-Phase on the dash?

Hey fellow Truckers.
This is my first day signed up here and here's my post with a simple question that I absolutely cannot find an answer to. I've really enjoyed reading the forums for weeks. Well here goes...

I'm getting ready to make some major adjustments for sheer simplicity by moving my Antennas. They are currently installed on the lower mirror bracket bars and I'm going to raise them to the top bars. I know I'll have to re-tune them which is fine but to do so I'll have to use a new Co-Phase since the old can't reach that high. I don't have time one the road to do a thorough cable install. I'm wondering if anyone has ever connected the coax and just layed the remaining lengths on on the dash while still properly rolling up the remains long ways and in a figure 8 of course then neatly placing them in they're respected corners tied off? Is so how was the reception?

This is just temporary as I'm not going home till Thanksgiving. That's when I'll go in and properly hide the coax.

(BTW, off topic but ground is NOT the issue with International Prostar. I believe it was FireStick that first said that as they were most likely the first to investigate why suddenly they were getting more complaints than ever then learned it was nearly all driving a Prostar. But they were very wrong and all they said in their report that's still posted on their site is very obvious they only saw a new major change and just as quickly pointed a finger. I have the answer and it will dramatically improve any Prostar Drivers CBing! I'll be sharing a lengthy post on it later when I have more time to type. And once I do I'll attach the link here too so you don't have to go digging.

 

Actually there's much more to benefit by having Dual setup. When one on each side your range goes at least 1/3 farther in front and behind but less to the sides which is still a lot of range. Plus you'll not be blocked by your own trailer as you will with only one Antenna.

Also, you're correct on less length for a single but you still have to go by Full, Half, and Quarter Wave Lengths which by simple calculations the shortest you should run for a single is 6' no less and multiply by 2 and skip every other one like skip 12'. Don't use 12'.

(ADDED)

Also, the wave lengths are per Frequency (Channel) and change therefore someone who might use CH15 the most would want lengths cut to match those wave lengths. This isn't all about SWR as many claim. The Transmitter CB Radio only sees the entire system which includes the truck all together and not just the Coax or Antenna like even many CB Shops believe. So in certain conditions you can have a shorter than 6' coax, same length antenna, but with a larger truck have perfect swr with only the coax being different. Or in a case where perfect swr coax and antenna will by sky high see on another that's identical accept maybe a different engine. This is because of everything plays a roll which is also why it's best to be away from any outside obstructions, doors closed, and so forth when checking swr.

Most people believe it's just about the antenna but that were that case then they would just have to make a line of antennas for each type of truck and keep them all the same size. This is also why I'm a firm believer in not tuning a new Antenna without first doing a major inspection on every single item to do with their respected duty within the system and that even includes ALL vehicle ground straps to make sure every section of the vehicle is bonded as one and finalled out at the negative battery terminal. One broken or even loosened ground strap of the vehicle and make a huge bad difference.