[Milsurplus] I-56

Thu, 15 Jan 2004 12:16:44 EST

Ray,

You appear to be missing a Model 564 Type 3C Voltmeter plus the Instruction 
Book (which would tell you what's missing).  Besides the various hookup leads 
which don't appear to have had Weston Model numbers, the I-56-A consists of the 
following Weston Model numbers:

564 Type 3C Volt-Ohmmeter
571 Type 3A Output Meter
665 Type 1 or Type 2 Set Analyzer with carrying case
666 Type 1B Socket Selector
666 Type 2 Capacity Unit  
685 Type 2 Tube Checker
??? (test prod multiplier for the Model 564).

The Instruction book for the I-56-A is T.O. 08-10-26 (three editions that I 
know of and the T.O. number was assigned after the last of them were printed, 
so it is not actually on most of them).  Later model sets were covered by TM 
11-303, 11-309 and 11-321.  It went at least through I-56-K, later models 
consisting of Signal Corps nomenclatured components like the I-176 and I-177, which 
aren't Weston commercial units.  One of two I-56-A's that I bought had a Model 
695 Type 11 (or it might be Type II) Output Meter.

The two small meters slide down into two of the three left-hand compartments 
in the chest.  From the photo, it appears that the compartments have been 
plugged with something, maybe cardboard?  They don't look as deep as in my two 
chests.

The early instruction books include test settings for a number of pre-war 
radio sets such as SCR-178, SCR-A*-183, BC-AA-191, BC-312 (no letter suffix 
model), etc.

There were Navy versions of some of the units, which carry Navy Type numbers. 
 They are part of Model OE-(*) Radio Receiver Analyzing Equipment.  I've seen 
parts of OE-5 and OE-12.

In a message dated 1/15/2004 9:37:08 AM Central Standard Time, 
[email protected] writes: 
> Just put some pictures of what I believe to be a complete 1939 Signal
> Corps I-56 test set on my web page,  www.ka3ekh.net  they are under "
> Project of the Week" If anyone is interested let me know if its the
> complete set or not yet.
> Ray Fantini

Robert & Susan Downs - Houston
<http://www.wa5cab.com> (Web Store)
<[email protected]> (Primary email)
<[email protected]> (Backup email)

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