[ARC5] arc-5 BCB RX seen

[WA5CAB at cs.com]

I expect that the LM was more likely used for checking or re-setting the 
Liaison Set but the fact remains, easily proved by checking in any LM manual from 
about the LM-10 on, that the LM was supplied three ways, with AC rectifier 
supply, with dry battery supply, and with no supply.  Although it's possible that 
the dry battery operated LM's could have been carried in aircraft, if that 
was the intent, why build LM models capable of operating from an external supply 
or 12/14 and 200/260, 24/28 and 200/260 or finally 12/14-24/28 and 
180/260-260/475?  Plus the obvious fact that the LM's DC power cord plugs directly into 
the accessory connector on the ARA, ARB and RU juction box.

In a message dated 11/3/2007 4:38:51 PM Central Standard Time, 
kk5f at earthlink.net writes: 
> >>Looks like a pile of junk to me with the exception of the power PI unit
> >>for connecting to the LM-xx.
> >
> >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.  
> 
> Only (but always) the BCB receivers CBY-46145, BC-946-B, and R-24/ARC-5 were 
> issued with this power adapter.  There is little evidence that *many* of 
> these BCB receivers ever saw actual service, so there is little likelihood that 
> there would be a receiver in the command set rack that had this adapter 
> unless it was separately obtained and installed in another more commonly used 
> receiver.  Had this been a common requirement, one suspects that the beacon band 
> receivers would have been issued with the power adapter.  But just how likely 
> would in-flight precision frequency adjustment of the command set gear be 
> required?  Never, I think.
> 

Robert & Susan Downs - Houston
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