mmckenna
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What are the consequences of not using a service monitor or tuner? Thanks for all the help from everyone
Electronic components age and their values drift. When the radio is built, it gets aligned so it works properly:
-Actually transmits on the correct frequency
-Actually receives on the correct frequency
-Puts out the correct power
-Receiver sensitivity is well adjusted so it can hear weak signals
-Transmit deviation is correct so it's not transmitting outside it's assigned channel.
-CTCSS deviation is correct
-bunch of other stuff
When the radio ages, the components drift and the performance of the radio often goes out the window.
For any sort of public safety use, that's got a number of issues:
-Radio will not work correctly, and if your life depends on the radio, that's a stupid place to put yourself.
-Radio could end up causing interference to other users - that puts their communications at risk.
-FCC requires the licensee (your agency) to make sure the radio does not cause such interference, that means they are responsible for fixing it, or replacing your radio.
If this is for GMRS use, there are requirements that your radio work properly and not cause issues to other users.
If this is for amateur radio use, do whatever the hell you want, it's just a hobby, but a crappy sounding radio (off frequency) will probably get some complaints.
Chances are the radio may be "good enough". But for the average hobbyist, that can be difficult to determine without the right test gear.
On the other hand, getting an old radio like that properly aligned, will make it sound good, perform well, and give you a few more years of useful life out of it. Kind of like giving your car a tune up.