[R-390] Comm Systems Corp, was Incomplete IF module

[Tom M.]

Glenn,
Your incomplete IF module is from Comm Systems Corp of Morton Grove, IL, run by
a fellow name HM Harper.  They "attempted" to make R-390A's from tooling bought
from Stewart Warner, but the tools were in poor condition and the company never
 was able to produce full sets that met satisfaction of the inspectors.

The company eventually argued that R-390A's could not be made to specification
(huh?) and that the contract be terminated.  The govt took all the stuff and
Comm Systems quit the R-390A business.

Hope this helps.

73 Tom N5OFF
 

--- Glenn Little WB4UIV <glennmaillist at bellsouth.net> wrote:

> Some years ago I bought an incomplete IF module from a surplus house. In 
> cleaning this weekend, I uncovered it.
> 
> The module is marked
> SM-C-343621
> I.F. FINAL ASS'Y
> FR-11-C22-C-4-26418(E)
> SER. NO. 0294
> 
> The module has the tube sockets, RF connectors, T5-1-T503, Z501, C506, 
> TB501 and some small parts mounted. Very little has solder on it.
> 
> Is this a rare find?
> 
> Why would it have the serial number assigned before completion?
> 
> Thanks
> 73
> Glenn
> WB4UIV
> 
> 
> 
> 
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