As I recall, they used some sort of random alpha wave transmitter to foul up everyone's brain processes.

For this, short wave transmitters were put into operation.

But the short wave transmitters failed to work, and for a reason that was soon discovered.

Similar antennas with smaller dimensions are used also for short wave transmitters, if these send in the round spray enterprise.

Also the transmitting power of the long wave transmitter was increased again to 500 kW.

The grounding system of the long wave transmitter is very large.

We ought to have portable short wave transmitters.

"X" took a small leather-covered case containing a compact short wave transmitter and receiver.

But we were unsuccessful and our thoughts turned to other possible centimetric wave transmitters.

The 9th radio center in Elektrostal is home to a high power medium wave transmitter.