RT-209/PRC-21
 
is a "non-tactical" radio, designed from the ground up for use by the Army, mostly Military Police.
 
Most military non tactical radios were just adaptations of police radios in use already by commercial users
 
Secondly ist is one of the first radios to use transistors and tubes together.
 
Tubes were in sockets because they wore out. A tube tester told you when a tube was worn out. Transistors replaced tubes. Therefore, they needed to be in sockets, and so obviously they needed a tester to test transistors..... except that you didn't really need sockets or a tester because transistors do not generally wear out. The joke was on the taxpayers.
 

TS-1836 Transistortester for RT-209/PRC-21 and AN/URC-11 (Click picture to enlarge)

A second non-tactical radio in my collection is the
PRC-127

The collection's Non-Tactical Radios RT-209/PRC-21 and PRC-127 (click pic to enlarge)

Frequency range:

152 .. 174 MHz

Channels:

1, crystal controlled

Mode:

FM

Channel spacing:

50 kHz

HF- output:

150 mW

Sensitivity

2 µV

Battery:

BA-358

Manufacturer:

Motorola

Year of issue:

1955