I’m actually in a very similar situation to the OP and wanted to get a little more info on this topic.
We have a car that we race on a few different tracks all of which cover less than 1 sq. mile. Here’s a good example of one of the tracks we commonly run: MSR Houston. Generally our spotter is only allowed to be in the buildings with the red roof, which is really just an open-air raised observation deck. The white buildings to the south of the observation deck are metal and generally prevent direct line of sight to the back side of the track. Other tracks we run have significant elevation changes such that there are line of sight problems throughout big parts of the track. I’m assuming we’re just kind of hosed when it comes to line of sight, but I’d love to know if there are any solutions that could help.
Our ideal setup would include the following:
[ul]
[li]a radio for the driver which is wired into the car’s electrical system so we never have to charge it or worry about batteries.
[/li][li]a handheld radio for the spotter, although something that fits into a backpack would be acceptable. We just need something portable.
[/li][li]a radio for the pits. This could be a handheld or a more permanent stationary system as long as it can be torn down and transported in a car relatively easily.
[/li][/ul]
All that being said here are my main questions:
Would an external antenna on the car help? The cars we race are cheap, old, and decorated to intentionally look ugly, so a gigantic antenna on the top would kind of be a plus. If an external antenna is not an option, would mounting the radio outside of the car and it’s metal body panels help with reception?
Is CB an option? Would CB radios give us better range than the VHF radios listed above?
Assuming we did go with a VHF radio like the one shown, do they come with an external power adapter or are batteries the only option? Even if it’s for a 110v wall outlet I could probably rig something up with a few parts from radio shack so it would work in the car.
Are throat mics really any good? The limited experience I’ve had with them has been awful. I’m not sure if that’s because I was using a cheap one or if that’s just the nature of the beast. Are there setups with active noise canceling mics and PTT?
What kind of licensing would be required with the VHF radios shown? Would everyone on the team need one? How hard/expensive are they to get?
The last thing I’ll say is that budget is definitely a major limiting factor (our car only costs $500 without safety equipment), but I’d be interested to hear what kind of setup you might recommend if money was no object.
Sorry for the long post and thanks in advance.