[R-390] Pricing Help on Adler R-390A - I must be lucky .... #2

[Albert Solway]

DCrespy@aol.com wrote:

> Actually Rodney, I think the conventional wisdom is that the modules will
> have serial numbers that are very close together, but not necessarily the
> same.  If they are close then you probably have an original unit that has not
> been through Depot maintenance.
> 73
> Harry KG5LO:
>

Hi All.

My 2 cents worth. In my experience with manufacturing in the military environment
one of the Quality Assurance requirements was a document called a Configuration
and Serialization List. This document listed serial numbers, manufacturing
history, test data, drawing revisions etc. of each module that made up the item
being shipped. These modules usually came from a pool of modules and were drawn at
random for integration into the final item. As a result it is highly unlikely that
modules in any final item would have matching serial numbers. Serial numbers would
usually be applied at a level of assembly when test data, by module, would be a QA
requirement. So at time of shipment serial numbers of particular final item is
known but at the first overhaul this would be lost.

The R-390 series of radios was designed in a modular fat ion to make field and
depot repair simple and fast. Modules could be then repaired at leisure without
affecting radio down time. So to a have a mix of module serial numbers and
manufactures in any radio is proof of the original radio reliability design
objectives.

I don't know what kind of manufacturing QA requirements were required in the 50s.
My experience dates to the late 60s. Also excuse my terminology for field and
depot repair, it may not be appropriate.

Al VE2TAS