[R-390] 390A contractors

[Bob Camp]

Hi

Simple answer on the PTO’s is that they didn’t stay in spec forever and ever. Buying new ones was a lower cost
alternative to reworking them in the field or even at the depot level. 20+ years after they built the last one, the assembly 
girls at Motorola still had nasty things to say about setting up PTO’s …..

Bob

> On Oct 19, 2016, at 6:46 PM, wb3fau55 at neo.rr.com wrote:
> 
> So in the subject of contractors,  were there suppliers of just subchassis?  I have been told that Teledyne, Amelco, and Imperial all worked together  to build their radios.  So we know of 5 contractors of PTOs-  Collins, Cosmos, Motorola,Dubrow, and Progressitron.  Perhaps others?  
>  So my real question is were running spares made up separate?  I know there were new IF strips made.  I saw some at a hamfest.  As always,  fascinating info.  73s Russ.
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