[ARC5] arc-5 BCB RX seen

WA5CAB at cs.com WA5CAB at cs.com
Sat Nov 3 22:24:56 EST 2007


Further to my previous, the LM-10 manual (one of the several models supplied 
by contract with no external power source) states in part:

...For standard installation in Naval aircraft, the required operating power 
is drawn from the junction box of any aircraft radio equipment of the Model GF 
or RU Series...

Unfortunately, the LM-10 is the highest numbered (i.e., latest) external DC 
powered model that I have the manual on so I don't know what that paragraph 
might have read in the 1944 LM-19 manual.  But presumably as the ATA/ARA replaced 
the GF/RU, it would say ARA.

FWIW, the external DC operated models are -2, -4, -4a, -5, -9, -10, -14, -16 
and -19.  And the dry battery operated models are -1, -3 and -17.  Which in 
answer to John's earlier implied question is why far more of the oscillator/freq 
meters are around than of the AC power supplies.  Further, the -9, -16 and 
-19 were in waterproof carrying cases which I suspect (but don't have the 
manuals to prove) might imply vehicular use.  Unfortunately the FMF Pacific document 
I have that lists radio equipment used in vehicles such as the M3/5/5A Stuart 
and M2 75mm GMC doesn't list auxiliary equipment.  Only the radio sets 
(either GF/RU or TCS).  But only six of the 22 models, -6, -8, -11, -15, -18 and -21 
(a mod of three earlier models) had AC supplies.

In a message dated 11/3/2007 5:20:40 PM Central Standard Time, 
AAF-Radio-1 at aafradio.org writes: 
> >>The power connector would more likely go to a ZB homing receiver since
> >>it was used with the 46145 receiver (along with others.)  Actually, I
> >>can't recall an installation where it was used to power an LM, though
> >>it certainly could ... and I'm sure (and hope) someone can point one
> >>out to me.
> >>
> >
> >I suspect that the old tale about those power adapters being used for the 
> LM frequency meter is mostly just supposition.  
> >

Robert & Susan Downs - Houston
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MVPA 9480
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