[Milsurplus] Early Navy receiver multicoupler

[Nick England]

Just found some photos of these CKB-50172 Multicouplers in use -

Guam 12/44 - looks like these multicouplers I think?
http://www.navycthistory.com/images/Guam_029_big.jpg

And definitely they are here at Skaggs Island 6/45
http://www.navycthistory.com/images/skaggs_1945_11_big.jpg

I think this photo on BB-55 shows, at each LOP, a common trunk with
resistive taps (Rob Flory knows) plus a separate jack running back to
the patch panel.
http://www.navy-radio.com/ships/bb55/rad1-104.JPG

And this earlier photo on Guam in 1944 looks like rcvr leads running
up to trunk lines in the overhead? Hard to tell.
http://www.navycthistory.com/images/Guam_V_big.jpg

cheers,
Nick
www.navy-radio.com

On Tue, Jul 6, 2010 at 8:21 PM, gl4d21a at juno.com <gl4d21a at juno.com> wrote:
> Group:
>
> These are questions for which I have been seeking answers for some time now.  It seems everyone who operated multi receiver sites in the 30s and 40s has developed amnesia.  Rhombics and 600 ohm line could easily tolerate resistive dividers feeding the 200 ohm input Z of receivers of the day, but little documentation and zero memory seems to remain.  Thanks for turning this up, Nick.
>
> 73,
> George
> W5VPQ
>
> ---------- Original Message ----------
> From: Nick England <navy.radio at gmail.com>
> To: Military Surplus Mail List <milsurplus at mailman.qth.net>
> Subject: [Milsurplus] Early Navy receiver multicoupler
> Date: Tue, 6 Jul 2010 17:52:21 -0400
>
> In case you are curious about such things -
> Manual for 1943 vintage 4-output Navy multicoupler CKB-50172 is now on
> line - link at
> http://www.navy-radio.com/rcvr-coupler.htm
> There's also a data sheet on the RXA which had three 10-output multicouplers
> Both made by Hoffman
>
> I've seen a similar vintage Signal Corps unit, also using 6AC7's but
> with Western Electric instead of Navy coax connectors.
>
> Before these, I guess installations used ?? ohm coax with resistive
> decouplers for each receiver? I think that's what I have seen on WW2
> battleships?  And maybe open wire with resistive decouplers for some
> installations....Rob? Anyone?
>
> cheers,
> Nick
> www.navy-radio.com
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