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Forum: Aviation History and Nostalgia

11th Oct 2017, 03:12

Replies: 32

Constellation Antenna

Views: 7,814

Posted By JohnMcGhie

Hi i42: The Lecher Line "size" is determined...

Hi i42:

The Lecher Line "size" is determined by the frequency at which it operates (around 200 MHz). In this case, "not large", maybe 18" long. It's two rods of metal in parallel with a shorting...

Forum: Aviation History and Nostalgia

10th Oct 2017, 10:16

Replies: 32

Constellation Antenna

Views: 7,814

Posted By JohnMcGhie

Thought it might be :-)

I thought that's what it was, but I remembered "Rebecca" as the Air Force name for them. I worked on Rebecca systems, in the Bristol Freighter and the DC-3, in 1968.

Evil device: the transmitter...

Forum: Aviation History and Nostalgia

9th Oct 2017, 20:14

Replies: 32

Constellation Antenna

Views: 7,814

Posted By JohnMcGhie

TACAN or DME?

That looks like the TACAN (VOR/DME) or DME antennas found on aircraft such as I used to work on. I am more used to seeing them under one wing, but that looks like the antenna: spacing and size are...

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