[Milsurplus] Any reason to Navy ID numbers

[Mike Morrow]

John wrote:


>Can anyone explain the Navy WW II equipment ID system.

As others have written, Cabc-xypqr-z translates

Cabc - Contractor ID.  Many can be found on Fred Chesson's site.

xy - function

pqr - unique equipment ID.  As Mike Hanz pointed out, this is numerical
except for radar equipment (then it is alphabetic).

z - Equipment version

It's the xy function info that's most informative.  I'm sure there's an
official list somewhere on the net, but I don't know where.  Until someone
posts something more complete and official, here's a short list from
equipment and manuals that I have:

10 - Mounting plates, cases
14 - Antenna switch
19 - Batteries
20 - Rectifier power unit
21 - Mechanical power unit
22 - Meters
23 - Control unit
24 - Switches
26 - Keyer
29 - Antenna relay
30 - Inductors/transformers
40 - Crystal unit
43 - Receiver-Transmitter unit
46 - Receiver
47 - Tuning unit
48 - Capacitors
49 - Audio output panels, jacks, speakers, sockets, cables
50 - Modulator
51 - Audio input (microphone) unit
52 - Transmitter
55 - Remote indicator unit
60 - Testing unit
61 - Insulators/terminals
62 - Junction box
63 - Resistors
66 - Antenna unit
69 - Loop antenna
71 - Antenna reel
74 - Frequency meter

You'll often find examples of redundancies and seemingly inappropriate
assignments of function code to some components.

73,
Mike / KK5F