Yes, those are part of the SR B70 (or Marconi HP 311) SHF radio relay set. You're missing the actual set, though.

It operates around 4.5 to 4.8 GHz.

I actually need the aerial leads for a set, and a few other parts, so if you're not intending to get the rest of it, I'd be interested in buying them. :)

Chris.
(The set is not that useful, providing a duplex audio channel on a strictly line of sight microwave link. Works well from hilltop to hilltop, or across a river/gorge, but obstructions are bad news - and a cow standing in front of the aerial will completely block the signal.)

beams
 

Maybe those sets were useful because the enemy would have little chance of listening in. With such a narrow beam of energy , an enemy receiving station a few degrees out of line would not hear anything ? During WW2 the Germans had a similar light communicating system .

Was the reflector in those ubiquitous wartime Lucas lamps a parabolic dish ?

Saved from the Tip.
 

Got these today as we saved more from the tip, bit by bit they keep appearing with a lot more sheds to go. I hope I will have the set shortly.

Cheers,

Dave.