[Milsurplus] Morale Audio on Ships

[Travis Davis]

Nick and John,

We have almost the same arrangement for our morale system. Our system
consists of about 20 to 25 speakers, three RBO receivers, and on
phonograph. Our speaker-amplifiers are CRV-49131s with a four channel
selector for either one of the three RBO receivers or the phonograph
in Radio II. Just like yours they are wired in series with a push pull
amp with with 600 milliwatt 600 ohm input. From tracing the wiring
from the jacks to each speaker-amp we have found no external amp nor
any provisions for such (we were looking for line breaks).  If you
would like, I have a wiring diagram for our speaker amps though I
don't know if it will be helpful to you. As always if I can be of
assistance let me know, as I am very grateful to the help that you
have given us!

Best Regards,

Travis

Message: 4
Date: Thu, 13 Jan 2011 14:29:57 -0500
From: Nick England <navy.radio at gmail.com>
Subject: Re: [Milsurplus] Morale Audio on Ships
To: jfor at quik.com, Military Surplus Mail List
       <milsurplus at mailman.qth.net>
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       <AANLkTi=CoHUToTqXM6-12PfqwhNp63XMiZjaxJ1FJi-u at mail.gmail.com>
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Hi John -
Look at the NT-49620 selector/amp/speaker here (toward bottom of page).
http://www.navy-radio.com/rcvr-spkr.htm

There is also the NT-49545 selector/amp/speaker but I don't have any
photos - just a drawing-
http://www.navy-radio.com/navpers/3-58.jpg and this description
Amplifier-Speaker Unit NT-49545
   The Navy type 49545 amplifier-speaker unit, seen in figure 3-58,
is a combination audio amplifier and loudspeaker assembly. Its
reproduction qualities are considered good. Aboard most ships, it is
installed in berthing and messing compartments as an entertainment
loudspeaker.
   All operating controls of the unit are located on the front panel.
They consist of a power on-off switch, a power-on indicating lamp, a
tone control, a volume control, and a channel selector switch that
permits selection of up to five different entertainment (or
communication) channels.
cheers,
Nick
www.navy-radio.com

On Thu, Jan 13, 2011 at 2:04 PM, J. Forster <jfor at quik.com> wrote:
> Hi,
>
> Does anybody have any info on the distribution of Morale audio to
> Officer's compartments on WW II ships.
>




> Apparently thyere wasw one (or several) line level audio busses and each
> space had a selector switch, volume control, small line powered amp (1
> tube, 117N7), and speaker.
>
> Does anybody actually have an amp (or manual for it) that could be duped,
> or info on how the audio signal was distributed. Was there a distribution
> amp also?
>
> Best,
>
> -John
>