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Originally Posted by KE4QPF Don't quote me on this, but I've heard in different forums that there's a red piece of rubber around the base of the antenna on the inside of the phone housing. This piece of rubber is supposedly meaningless and can be removed to receive a 3db gain in signal strength on both the transmit and receive sides of all NEXTEL models. See if some of the more experienced guys on hee know what I'm talking about. I'm sure one of them can walk you through the mod if it does indeed exist. |
Here's something else that might work, although not intended for this exact model as part of Motorola's mods...
http://cellphoneforums.net/t167018.html
This is what's called a ground-plane kit for a dipole antenna... meaning: the signal will bounce against the plane of the ground to improve its radiated pattern from the radiation point (the antenna), thus sending signal up into the atmosphere (the normal route) as well as along the ground and outward (through the radials) before bouncing back into the atmosphere. This sends your signal across more land mass and up from more points than if you send it up from a single point using a telescopic/dipole (like NEXTEL's) antenna system without the kit. THIS HAS BEEN USED BY HAMS AND CB OPERATORS FOR 50+ YEARS WITH GREAT RESULTS. If you could imagine, when you pour water onto a concrete slab, you have some that rolls out flat to the sides, and some that bounces back up at different angles from the ground. Same principle here. The thought is that the signal gets spread more evenly across the ground when forced through these radials as opposed to using your body as the ground plane. The bad part about this system is that 1/3 of the ground plane gets blocked by your body making that side of the RF a "dead zone" because you are sucking up that radiation into you and redisbursing it instead of the ground-plane radials having a clean shot of actually hitting ground with signal. This system was designed more for "free-standing" antennae as opposed to hand-held units. Apparently Moto has had luck with the i730 by using this technique... it may not work with all handsets in the same way.