John Smith wrote:
"Don`t spoil the fun! sad-face"

According to my online encyclopedia, the Maser is not new. It appeared
in the Soviet Union about 1952 and was quickly adopted in the U.S.A..

Early Masers got stimulated emission in a stream of energized ammonia
molecules at 24 gigahertz.

Nobel prizes in physics were awarded in 1964 for Maser developments.

The last 40 years has seen emphasis shift to Optical Masers (Lasers).
These now have many applications from surgery to chart pointers. They
are also used to cut metal.

Not quite as many varieties as Baskin & Robbins yet, but the game is
new. Lasers come in many colors and power levels. Wavelengths are in
hundreds of nanometers. 193 nm is UV and comes from argon flouride.
10,600 nm is FIR from Carbon Dioxide. This is the metal cutter.

Find the right material and discover how to tune it to the frequency of
your choice. You may have a new HF generator. You may not have obviated
wave guides and antennas appropriate to the frequency.

Best regards, Richard Harrison, KB5WZI