Re-Post from MDT
In light of recent events, I was thinking about the best communications solution for a fixed position, such as a homestead. My first choice would be these:
This is a US military-issue TA-312 field phone. It uses two “D” cells that last forever. You could also get these:
This is a US TA-1 Sound-Powered Field Phone. Less range, but no batteries needed.
Both of these items are available online from various surplus dealers. Fair Radio has TA-312s for $200 each, and they are considered one of the more expensive dealers. I bought a couple Czech field phones at an army/navy store a couple years back and paid $40 each for them. The US and European field phones (the old analog ones) will all talk with and signal each other.
For short-range, on-site, radio comms that will keep the average hobbyist from intercepting your signal, go with Motorola DTR series handhelds.
$230 each on Amazon. They use old-school Nextel accessories and have all the neat surveillance-type earbud microphones available for them. Very simple to use. Easier than a Baofeng. They run digital frequency hopping on 902-928 MHz. and hide among all the SCADAs and other spread spectrum stuff there very well. Maximum range is an honest 2 miles. Unless you’re in the Berkshires where they get about a quarter mile. Perfect radio for the homstead. Motorola puts the indoor range at 350,000 square feet, or a little more than 8 acres. Outdoors in the open they go much farther. Milspec-810 rugged. 19 hours on a single battery charge, 12v DC adapters available.
Finally, they operate on a license-free band, so no ham ticket is needed.
If you needed to discretely communicate around your farm or homestead with a little more security than ham radio, MURS, FRS, or GMRS, these items would be my recommendation.