[ARC5] ARA, SCR-274-N, AN/ARC-5 Remote Control Box Dials - Questions

[Kludge]

-----Original Message-----
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
Behalf Of Mike Morrow
>   Dial MHz      RAT/RAT-1     ARA     SCR-274-N    AN/ARC-5
> 13.5 to 20.0     #6056         --        --           --
> 20.0 to 27.0     #6193         --        --           --

Thank you for these.  I didn't have them anywhere.  :-)

> It appears that none of the dials were ever marked with any of the IDs
> shown above.

None of the ones I've seen had them although I hasten to add I haven't
looked on the back of *all* of the ones I have or had.  

> The drawing/part numbers in the equipment manuals of both dial types for
> a particular frequency range are identical, oddly enough.

Opinion: It was treated as a revision rather than a new part.  That way the
same part number could be used.  That way they also became replacement parts
for ARA receivers as well and technically SCR-274-N receivers although that
wasn't likely to happen since the AAF supply train went back to WE instead.
At the same time, the aircraft that were transferred from the AAF to the
Navy that had SCR-274-N equipment in it were subject to at least some
"curiosity" on the part of Navy ATs and other such folk which might have
lead to occasional experimentation ... not that I would accuse any of the
fine upstanding members of that service of any such activities ... :-D

Anyway, with normal wartime attrition, it would be less likely to find an
airplane fitted with an earlier version of the control head dials since
they'd most likely to be at the bottom of the Pacific somewhere.  OTOH, it
would be educational to find out when the change took place from the older
to the newer style dials and if that predated the AN/ARC-5.

Best regards,
 
Michael, WH7HG ex-K3MXO, ex-KN3MXO, WPE3ARS, BL01xh ex-Mensa A&P PP BGI 
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