[ARC5] Distribution of ARC-5 Audio

[Todd, KA1KAQ]

And at a more basic level, receiver choice can be controlled by where you
plug in your headphones on either the receiver rack or control box, though
the 3 receiver control box only appears to have outputs for two of the
receivers.

Having been fortunate enough to have flown in a B-17, I still chuckle at
the thought of external speakers. (o:

~ Todd,  KA1KAQ/4

On Sun, Apr 24, 2016 at 8:26 AM, Michael Hanz <aaf-radio-1 at aafradio.org>
wrote:

> I forgot to mention that if you were interested in *only* the ARC-5
> receivers, see the AN/AIC-4 interphone system diagrams at
> http://aafradio.org/docs/AIC-4.html - things were a lot simpler then.
>
>
> On 4/24/2016 8:13 AM, Michael Hanz wrote:
>
> On 4/23/2016 7:33 PM, Cliff Miller wrote:
>
> In an aircraft with multiple receivers, how was the audio output
> controlled and distributed?  Were the audio outputs bussed together or
> switched somehow so an individual user would only hear one receiver?
>
>
> There is a very large number of answers to your question - as posed.
> First you have to define what you mean by "aircraft" - size, number of
> crewmen, primary mission, etc.  Then you have to define "individual user"
> in terms of their role in the aircraft.  The audio distribution in a
> military aircraft (normally called the interphone system) followed various
> paths over the years, growing exponentially more complex by the end of WWII
> because of the specialization of aircraft missions into less well known
> groups like countermeasures and signals intelligence.  One place to start
> is at http://aafradio.org/flightdeck/Interphone_systems.html where you
> can see the trends from the earliest RL-** Navy and USAAC RC-** interphones
> to where it all was going by the last system on the page (the AN/AIC-5).
> You'll see two different control boxes associated with that set, with
> different degrees of receiver selection.
>
> The AN/AIC-5 gradually evolved through the 1950s - for example, the
> AN/AIC-7 was essentially an AIC-5 with high intensity loudspeakers added
> for internal and external use.  Its manual states, "The pilot, copilot,
> radio operator, and navigator are each provided with a master control unit
> that permits selecting any one or combination of eight radio receiver
> outputs as desired."  The next generation appeared in the AN/AIC-10, which
> became perhaps one of the most prolific systems in the inventory.  It
> bridged the gap between tubes and transistors - I have one each of a couple
> of LS-184/AIC-10 loudspeakers with internal amplifiers that represent that
> shift from tubes to solid state.
>
> 73,
> Mike  KC4TOS
>
>
>
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