Yes, the one you hear - but not always see.
There are also YT techs that simply put the radio in a PA speaker and use the Talkback function - er - NO!
What I think, believe and use, are simple CB's - known to be noisy even slightly off - but if you really want to have a good known monitor radio - best to use a Base station type - built in power supply.
You can use mobile types, but they just add to the jumble jungle of wires crossing your desk and behind the bench - the best advice here is K.I.S.S (Keep It Stupefying Simple).
Which to choose, SSB over simple AM? Also - FM is a new standard they put in place for CB, so that kinda' ups' the auntie and now narrows the selection. But if you can locate a Ham bander set up for (shh...don't tell anyone - it's our little secret - 11-Meter) and can take the time to know it inside and out - then, POW, there you go. (IN reality I can't tell you to buy this or that and you'll be ok, just get something you can learn to fall in love with and then you can set the date to get married to your job over it)
It's the little things in life that make you go crazy...
So, to protect the investment - make your first projects a set of protective devices like fuse blocks and binding posts - build your own Dummy load and put it on the back of that radio first thing - so you don't make keyup mistakes - then you can graduate to external antennas and even raise a field full of them (If your wife will let you), just get a radio - CB or Export, Base over Mobile - just prefer a radio that can be fixed or even examined and test lab'd to help diagnose the other patients that arrive across your desk.
Eventually, the simpler tools might wind up being the ones you create and build to suit your needs at the shop (if you decide to open one) like Panel meters for mA power settings, A simple diode, resistor and cap combination to make your own SINAD meter LED for Bargraphs, simple routing switches (Your IT stuff can work here too) for signal routings and branching off for the various sensors and tools - even a few things from Harbor Freight and some simple sockets from a local Menards or Lowes - goes a long way in making test jigs and holders for radios and their associated "guts" to hang out on
