[ARC5] Re: [Milsurplus] Re: How Secret Was the ZB/YG System? Not much!

[Mike Hanz]

Just to stir the pot a bit more, I put the cover and the first two 
addenda pages of the manual in question on the documentation part of the 
aafradio website - aafradio.org/docs .  This is clearly a post 1943 
manual - it's frustrating that they continued to use the original 
contract number on it without a new date or contract mod number...I 
suppose it was in its umpteenth add-on mod by then   Note the comparison 
page for all the ZB-* equipment and the "United Nations" ARR-1!  Mike, 
it does have that kludgey cable end detail you mentioned in the back, 
Figure 22 - sorta like the DU-* solution.  Nasty!  :-)

 - Mike

Mike Morrow wrote:

>Mike wrote:
>
>
>>Interestingly enough, my copy of "Final Instruction Book for AN/ARR-1 
>>and Navy Model ZB-3 Aircraft radio Homing Adapter Equipment" is 
>>serialized, marked CONFIDENTIAL, and has a red cover.  The contract date 
>>is 29 March 1941.....
>>
>
>That is interesting.  I'd never heard of a CONFIDENTIAL book on ZB/YG ypes of systems.
>
>I have a copy of the "Preliminary Instruction Book" for the ZB-2, same contract date.  It's RESTRICTED.  I have a copy of the AN/ARR-2 Operating Instructions dated 01 MAY 1944.  It's RESTRICTED.  I have a copy of the AN/ARR-2 Maintenance Instructions dated 1953.  It's UNCLASSIFIED.
>
>It's odd that early in WWII they apparently raised the ZB and AN/ARR-1 classification to CONFIDENTIAL, but a couple of years later when the more advanced AN/ARR-2 system was out, they lowered that more capable system to RESTRICTED.  Doesn't seem too logical!
>
>Mike / KK5F
>
>
>
> 
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