Please, can anyone identify this (Admiralty ?) Valve Analyser M5. Going by the RN ID's & dates on components, this is post WW2 - possibly early 1950's.
Back then, the standard RN Valve Tester was the AVO Type 1(2 Panel). This is far more advanced & weighs about 17Kg. This valve analyser, I suspect was built "in-house" at a shore based Radio Depot's Workshop, or possibly somewhere like HMS Collingwood. Built by a skilled CPO, a couple of Tiffies, and a REM or two, I reckon. May have originally been a fixed workshop panel item, but the need for a decent portable tester arose due to the limitations of the AVO Two Panel. Eventually, as many Radio Tiffies & Tradesmen will know, the AVO CT160 came into use in the late 1950's/early 60's, so this item would've become obsolete.
Regards, David