[Premium-Rx] R-1051F

Mon Sep 9 12:40:57 EDT 2019

Yes the black side was removed from the ship before storage -except for the
safe which is still there in the little crypto room in radio which now
houses the IT infrastructure for the museum, a friend of mine who worked
for me at Google and also served aboard Iowa in the 1980s is their CIO
   - jcp

On Mon, Sep 9, 2019 at 9:36 AM 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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