Shed Find

[Chris Suslowicz]

Originally Posted by Dave Mills

Some more radio equipment from the Sheds.

Not WW2 but most certainty military.

Two dishes and one rectifier along with more cables and a very long lead which looks like an aerial lead (ZA 43174).

They look dirty from years of being stored in a shed but are almost untouched.

Any help would be of assistance.

Cheers,

Dave.

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.)

[Mike Kelly]

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 ?

[Dave Mills]

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.