[R-390] R390A Collins module serial numbers

[Roger Ruszkowski]

Dan, I was just in time build but the finished receivers were neverrequired to have a matched set of numbers. The field stations had whole production contracts to them selves.The close modules were often swapped into the matchingchassis number. By 1970 I seen many receivers withmatching serial numbers. From the girls on the assemblyline or the fellows over the years I do not know. Some warrant officer once went over the end when hecould not get all the subassemblies in his property bookto match for a second lieutenant. The enlisted men turned the pair into their management.School house trivia. What you think only enlisted men hazed the new guys? The man had receivers 1651 thought 1750 and expected a perfect match. If you had a module # 16 in a 1888 chassis you worried whatkeep that module in rework so long. Sub assemblies chassis modules mixed across contract runs werethe results of the depot dog operations of the signal corps tomaintain these receivers at sites where service was crateand exchange via diplomatic courier services.   Some site may swap four or five bad modules intothe depot dog and trade it in. Four fixes on sitebefore the crate exchange needed to be repeated.Maybe four crates traded all at once and thatwas your receiving side support in your diplomatic communication linkcomplete with US Marines for another year. Depot dog treatment was equal opportunity for all logistic supportat some communication sites around the world with service from the US Army Signal Corp. You may be more concerned for your transmitter spares. We do not have a need to know. Respectfully,  Roger Ruszkowski  -----Original Message-----
From: Dan Osborne <wb5afy at wb5afy.net>
To: R-390 <R-390 at mailman.qth.net>
Sent: Sat, Oct 19, 2019 8:29 pm
Subject: [R-390] R390A Collins module serial numbers

OK - recently I have obtained a couple of Collins 1955 contract R390A's 
that were used
by NBS in Boulder Colorado. I do not believe that these receivers were 
ever subjected
to "depot" reconditioning as all the modules are of Collins mfg. ( and 
have the correct
build dates and mods)

My question is - did the module serial numbers match the front panel 
serial number plate
when these receivers were originally manufactured ???

The serial numbers on the modules are very close to the front panel 
serial - i.e. - front panel
serial is 212 - power supply module is serial 95 - IF module is 220 - etc..

Just wondering if this was the way these were shipped from the factory???

Any info welcome...tnx

Dan O
-- 
W5AFY (ex WB5AFY) EM04id 972-839-6992 cell
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