The 40A was a grand old transmitter full of tubes ... This is a general-purpose 50 watt c.w., 40 watt phone bandswitching transmitter, working on 10 through 160 meters. It is intended to ...

A NASA spacecraft has started up a radio transmitter to communicate with the space station on Earth that it hasn't relied on since 1981. The development, however, is not out of the woods and came ...