[Milsurplus] Morale Audio on Ships

[J. Forster]

Hi Travis,

Yes, I'd very much appreciate the print if you can send it to me off-list.

Thsank you,

-John

===============


> 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>
> Message-ID:
>        <AANLkTi=CoHUToTqXM6-12PfqwhNp63XMiZjaxJ1FJi-u at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> 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
>>
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