[Premium-Rx] R-1051F

Mon Sep 9 13:20:55 EDT 2019

For anyone interested, I have photos of the USS Iowa installation at
http://www.navy-radio.com/ships/bb61.htm
The SA-2112(V)4/STQ Switching Matrix (Coke Machine) is shown, as are a
batch of R-1051G receivers and three W-J AN/URR-74(V)2 receivers.
The black receiver and transmitter switchboards are shown. As stated the
crypto gear was all removed but the Red Phones can now connect through the
Coke Machine direct to the black switchboards and thence to receivers and
transmitters.
Cheers,
<http://www.navy-radio.com/ships/bb61/DSC02120.JPG>
Nick England K4NYW
www.navy-radio.com

On Mon, Sep 9, 2019 at 12:36 PM sm0aom at telia.com <sm0aom at telia.com> wrote:

> "There's a very elaborate switching matrix machine called "the Coke
> Machine"
> because its large and painted red (because it operates the classified data
> path) which is used to route signals to/from the radio array on the ship"
>
> If the installation was done according to proper TEMPEST rules, the "Coke
> Machine" would be
> the "red matrix" which is connected in the un-encrypted signal paths
> between the crypto devices and the "red" phones or data terminals.
>
> On the other, encrypted, side there would be one or more "black matrices"
> or patch panels for assigning crypto equipment and modems to their
> respective
> radio equipment.
>
> Modern TEMPEST design rules prescribe physical separation or "air-gapping"
> between "red" and "black" equipment.
> Everything directly connected to the modulation input of a radio
> transmitter or the line audio of a receiver is by definition on the "black"
> side.
>
> 73/
> Karl-Arne
> SM0AOM
>
> ----Ursprungligt meddelande----
> Från : jcp at pistritto.org
> Datum : 2019-09-09 - 16:59 (CEST)
> Till : vk5abc at adam.com.au
> Kopia : Premium-Rx at mailman.qth.net
> Ämne : Re: [Premium-Rx] R-1051F
>
> Well people who operated on the ship said they had never used CW on that
> radio.  The Navy almost always used ISB often with different (usually
> digital) feeds to each sideband.
> (the switching matrix after the radio separated the sideband audio streams
> and sent them to potentially different decoders, some of which are still
> there. (the classified ones were removed).).
>
> There's a very elaborate switching matrix machine called "the Coke Machine"
> because its large and painted red (because it operates the classified data
> path) which is used to route signals to/from the radio array on the ship.
>   There are also manual preselectors to control the path from the
> *antennas* (which the ship has several types) to individual radio stacks,
> separately for receive and transmit.  The receive and transmit radios are
> actually located in different rooms on the ship.  There were about a dozen
> R-1051s in the radio room that were connected to it.  I've learned how to
> set up a path using "the Coke Machine" on board, its really a big cross
> point switch that is electronically (from a keyboard) controlled.   All
> this equipment was installed in the 1980 refit ofthe ship when Reagan
> recommissioned the 4 Iowa class battleships as part of the 600 ship Navy
> plan to compete with the Soviets, who were still a thing then (till 1989).
>
> If you happen to be in LA, going to see the Iowa is a great example of late
> 1970s radio engineering as all the radio equipment on board was updated
> then.   They also have a couple of the Racal radios that people
> discussion on this list, at least one of which is actually working and used
> by the "Gray Radio club" which are the people who operate the ship's
> original equipment on the air.   There's also a regular "ham radio" club
> which uses conventional ham equipment using the ship's antennas, they put
> the Iowa on the air for Museum Ship Weekends
> <http://www.arrl.org/Events/view/130911> and such.
>
>
>
> On Mon, Sep 9, 2019 at 7:51 AM L D Ritta <vk5abc at adam.com.au> wrote:
>
> > Well the mode selector module only has three filters lsb usb and am
> > So what did they use for cw or didn't they
> >
> > -----Original Message-----
> > From: premium-rx-bounces at mailman.qth.net
> > <premium-rx-bounces at mailman.qth.net> On Behalf Of Joseph Pistritto
> > Sent: Tuesday, 10 September 2019 12:10 AM
> > To: Clemens Ostergaard <clemenso at gmail.com>
> > Cc: Premium-Rx at mailman.qth.net
> > Subject: Re: [Premium-Rx] R-1051F
> >
> > I work on the USS Iowa museum ship which has a large # of those radios in
> > place.  They were rarely used for CW (but a lot of various RTTY-like
> > digital
> > modes)  The ham club on the ship actually uses them on the air from time
> to
> > time.
> >  - jcp-
> >
> >
> > On Mon, Sep 9, 2019 at 7:10 AM Clemens Ostergaard <clemenso at gmail.com>
> > wrote:
> >
> > > So it relies on the bandwidths 7 and 3 khz. Leading one commentator on
> > > eham to say :
> > >
> > > "The CW mode is all but useless, it's easier to use the USB mode on CW
> > > instead."
> > >
> > > It was optimized for ISB, not for CW
> > >
> > > Best , Clemens
> > >
> > > On Mon, Sep 9, 2019 at 3:38 PM Nick England <navy.radio at gmail.com>
> > wrote:
> > >
> > > > The R-1051 models do not have a separate narrow bandpass filter for
> > > > CW or RATT (FSK). These modes use the LSB filter but with different
> > > > BFO
> > > injection
> > > > frequency.
> > > > Nick
> > > >
> > > > On Mon, Sep 9, 2019 at 7:49 AM L D Ritta <vk5abc at adam.com.au> wrote:
> > > >
> > > > >
> > > > > Hello All
> > > > >
> > > > >
> > > > > What sort filter does  the R-1051 receiver have  for cw mode Or
> > > > > does it?
> > > > >
> > > > >
> > > > > 73's Lee de vk5abc
> > > > >
> > > > >
> > > > > ______________________________________________________________
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> > > > >
> > > > --
> > > > Nick England K4NYW
> > > > www.navy-radio.com
> > > > ______________________________________________________________
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