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The only good reason for 'dual antennas' is that they are directional. That means that signals will 'improve' in two directions and get worse in the other two directions. If that suits your purpose than dual antennas (phased) should work for you. I agree, where you propose mounting them...

I have seen those type mounts used but never used one myself. I would be careful about the size of the antenna used with one, they are not the strongest mounts in the world. The main problem is how it 'attaches', just a few set-screws. The other potential problem with that type of mount is...

I made a 'go-box' out of a fairly large plastic tool box once. Even put a male AC connector on the side to plug it into the wall. Didn't do enough thinking about that, cuz' the radio was DC and I didn't have a small power supply to put in the box. Oh well, it was close to a good idea! Later...

Can it make a difference? I think you can answer that one, right? How much difference depends on the antenna, some are more susceptible to icing than others. And then, it can depend on how much ice there is too. Or water, or bugs, or who knows what else. And to make it a bit more...

I think you will definitely hear a difference. No way I'll try to say how much difference, but there will be one. The same also applies to the guy on the other end, he'll hear some difference too. That's just from the differences in height. As for power, that's just not all that important at...

I have a mobile radio in the car so don't have to use an HT. But, if you want to do it that way (or I ever have to) there's certainly nothing that says you can't. Every radio has a different 'sound' to it, with or without an external microphone. Sometimes it's not easy to tell an HT from a...

"Since this is a ten meter radio instead of a cb stretched out..." What's the difference? - 'Doc

Antenna length has nothing to do with 'broadbandedness'. I can have a lot to do with efficient radiation. Which will be 'better' -for your particular situation-? Beats me, you tell us! - 'Doc

:) Take a look at the circuit for that 30 year old amplifier and I'll bet there's not 2 pence worth of difference from the newer ones. Same circuit, different components and builders... Can't do the tuning? Then you have two basic choices. Pay a lot extra for a 'self tuning' amplifier or one...

Affects of radiation on body parts. Pay attention to the frequency of use, that will make quite a difference. Not as good a performance if clipped to your belt as at arm/mouth height? Yeah, so what exactly do you expect from a compromise antenna to start with? It'd be even better if it were...

The information on that link is typical advertising B.S. It combines the 'mystical' 5/8 versus 0.64 wave nonsense, mixed with a misrepresentation of the radiator's actual 'electrical size', and some sort of el-toro 'poopoo' about coil size/radiation efficiency. You believe anything you want...

Yep, I saw that. It doesn't change what I said though. - 'Doc

The problem is that there's too much RF for the devices being interfered with to handle. Getting that RF further away from those devices, and/or limiting the amount of RF reaching those devices is about the only 'cure'. One of the ways that RF is getting to those devices is that the feed line...

"§ 90.203 Certification required. (a) Except as specified in paragraphs (b) and (l) of this section, each transmitter utilized for operation under this part and each transmitter marketed as set forth in § 2.803 of this chapter must be of a type which has been certificated for use under this...

Which to use? I think that's more personal preference than differences in ability. So which method would be 'best' for you is a question you will have to answer. That includes all the 'aspects' of it, availability, suitability, ease of use, ease of installation and adjustment, and then co$t...