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Old 27th Sep 2017, 10:47 am   #1
M0FYA Andy
Nonode
 
Join Date: May 2007
Location: Preston, Lancashire, UK.
Posts: 2,510
Default SIR101 - what is it?

Cryptic question time, folks!

I have a metal box, I suspect WW2 era, labelled 'Cases Minor Spares' with an Army Reference number ZC 18412. It also has an ID plate written in what I guess is Russian.

It contains spare valves and an ACR10 CRT. There are a couple of vacant spaces, one labelled CV100, which is a trigatron, and one difficult to read as it's been covered by a small paper label, also in Russian.

The trigatron points to the spares being for a Radar of some sort.

I think the writing under the paper label says 'SIR101 OSC'.

Googling suggests SIR might be 'Stepped Impedance Resonator', something I'm not familiar with, but then it could be something completely different.

Can anyone suggest what system the spares are for, and what the missing SIR101 OSC might be?

Many thanks,

Andy
M0FYA Andy is offline