<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by rodster:
I'd guess my best reception will come from the back, the sides will be even and in front will be the weakest. Agreed?
I grabbed this off the Firestick site.
Because of the imperfect world, we almost always recommend 18' (5.5m) when our products are used. We do so with good reason too! At 18' the voltage curve has dropped back to the zero voltage point where the cable meets the antenna which reduces the reactance within the cable itself (a null cable if you would).
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I agree. By placing it in the middle does that make it hard to get to? If your OK with a middle of the roof location, why not mount in the exact middle through the mesh GOBI deck?
Dick R is on the money with the distinction between Electrical Ground and RF ground. BOTH are important in this install. You must have an electrical ground or you will have a SWR reading of 3+. This is bad and can negatively effect your CB Radio. When you are tuning...If the lower CB channels are "worse" than the upper channels then this is an indication of an insufficient ground place (RF ground plane). This info can be found on FireStik.
I used that exact coax cable you had pictured, the mounting location I showed in my pic, and achieved at ~1.7 at channel 1 and a ~1.4 at channel 40. This means I had a little bit of a weak RF ground plane. The closer to the metal H2 roof you can the better (I had better and almost equal readings at 1 & 40 before the GOBI install; I think the few inches of elevation away from the roof caused this change).
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