Technical problems with the design of vacuum tubes for operation at high UHF frequencies were beginning to be addressed as late as 1954.

This system operated on UHF frequencies at 9600 baud.

There are the wireless microphones which use UHF frequencies.

"How in hell did he get our secure UHF frequency?"

This system operates on five UHF conventional frequencies.

He started monitoring all UHF frequencies, searching for the right one on which he could announce his arrival.

However, some stations with legitimate problems have asked to return to their UHF frequencies.

To talk with spacewalkers, the system uses a UHF frequency, which is picked up in the astronaut's space suit.

Shakthi TV broadcasts on a UHF frequency from 05.00 to 00.00.

(In many other cities, including large ones, educational stations had to make do with UHF frequencies.)