Transmitter/Receiver and Antenna Type No. 9307MR1
Made by Decca Navigator
Is this a radar altimeter?
Not quite a radio but a wonderful example of plumbing
for J-Band which is 10-20GHz
The first view shows the electronics cover held in
place with a couple of dozen quick release screws
The second view shows an orange aluminium cover protecting
the aerial assemblies
Removing the protective cover exposes the send and
receive aerials which are constructed from aluminium waveguides
This picture shows a close-up of sections of the waveguides
Now a view under the black cover showing a set of
five printed circuit board assemblies each carrying a pair of
circuit boards generally
using "54" series TTL logic chips. "54"
is the code for the expensive military version of commercial "74"
series integrated circuits.
On the following pages I'll take you on a tour of