Re: Do these cellular amplifiers work for all cellphones?

On 4/12/2022 4:17 PM, J. P. Gilliver (John) wrote:

<snip>

> Or even it could be a single carrier booster instead of a multi carrier 
> booster (I know they make both but I don't know the difference other 
> than the FCC limits drop in decibels when you go from single carrier 
> boosters to multi carrier boosters (why? what's the difference?).

Back in the olden days, pre-Bluetooth, there were hands-free car kits 
that had to be wired into the vehicles, complete with an antenna on the 
outside of the car, a separate speaker, and a separate microphone. There 
were different "cups" to fit different phones.

I put a Motorola one into one of my vehicles. This was back in the days 
of AMPS analog phones and the range was very good and the coverage was 
excellent. There was no amplifier but one wasn't really needed with the 
external antenna (but you could buy a 3 watt amplifier). I kind of 
became the source for information about the various Motorola models of 
these systems and had a web site about them, that's actually still up 
<http://www.nordicgroup.us/mphfck/>.