Scanner/Receiver and Transmitter vs. Transceiver
Could you use a scanner as a receiver and just purchase a transmitter or are scanners extremely limited in channels?
Scanners usually have a VERY wide range of frequencies that they can pick up. Some of them block out "cell phone" frequencies, and other frequencies not available for civilian use. You make compromises when you use one, however. You'll get "okay" reception across all of the bands... but you won't get "stellar" reception on any single one, unless the signal is originating from nearby. Scanners are good for finding WHERE on a frequency bandwidth there are transmissions being made, and faster than a human could do it. Getting quality reception of those transmissions is not the forte of scanners, in my opinion.
The way that Hams back in the day did it was to listen on their receiver, and transmit on the transmitter, using two different machines. There was some wiring that had to be done in order to make it possible for the receiver and the transmitter to use the same antenna in that case.
If you really wanted to, you could use a scanner as a receiver... but the antenna would probably be the limiting factor in that regard. Generally the antennas used for scanners are designed to work well over a broad spectrum of frequencies... and don't work especially well in just one area. So... you'll get mediocre reception across the entire bandwidth of frequencies, instead of stellar performance in just a few selected frequencies.
In principle, yes you could use the scanner as a receiver - but it's easier just to buy the receiver and the transmitter in a package deal these days. It might cost you the same to get a transmitter as it would to get a transceiver, which does both, and eliminates the hassle of trying to get the two to work well together. It also lets you focus your attention on which antenna to use, which some would argue merits the most attention, and makes the most difference. As a matter of fact, the ARRL has devoted an entire 300 page Manual, updated yearly, to the construction of antennas, and improving the antennas you already have. That should give you a pretty good idea of the importance that antennas have for a Ham Radio operator!
Your best bet in my opinion?: Get a good quality transceiver, and find an antenna that performs well in the frequency range you are most concerned with. Use a scanner to help you find where on that frequency range you are mostly likely to find transmissions.
Fachento
KD5VEZ