[Milsurplus] Frequency Measuring Test, What's an LR?

[Ray Fantini]

Ok, started trying to remember where this thought came from. At the battel of Tarawa the battleship USS Maryland served as the flagship for the invasion and originated the command and control nets. According to published record the communication systems aboard the Maryland all failed with the opening of her first salvo three hours prior to H hour, the start of the landing operations. It’s been speculated that this was due to poor quality installation of equipment after the Maryland was designated the flagship for that operation. Somewhere I saw a picture of a crew member working with a TBY on a ship and think that I recall it was supposed to be at Tarawa.
All of the communications failures of Tarawa, things like the short comings of the TBX and TBY, loss of the command nets, and failures in crew training make for inserting reading on how we finally resolved all the issue after the failures at Tarawa.

Ray F

From: Nick England [mailto:navy.radio at gmail.com]
Sent: Wednesday, November 04, 2015 12:49 PM
To: Ray Fantini
Cc: Rob Flory; milsurplus
Subject: Re: [Milsurplus] Frequency Measuring Test, What's an LR?

The pressure gauges etc are for the co-ax lines. Tubing with spacer beads and nitrogen IIRC.
I haven't heard the TBY story. Certainly ships maintained comms during and after gunfire. In general, shock absorbers successfully absorbed shock.

This LR and patch panels are at the supervisor's desk in radio central, starboard side on the first platform adjacent to the barbette for turret 2. Radio central has a curved bulkhead which is the exterior of the armored barbette (where ammo and projectiles were elevatored up to the gunhouse). Nearby were all the fire control mechanical computers.

On Wednesday, November 4, 2015, Ray Fantini <RAFANTINI at salisbury.edu<mailto:RAFANTINI at salisbury.edu>> wrote:
Like the picture on the battleship, especially the gauges and manifold up in the top left hand corner. Was the LR steam powered? I have read somewhere that the TBY had to be used on a battleship due to the vibrations from repeated fire of the main guns had rendered the shipboard radios inoperative, have a hard time believing this considering the quantity of radio equipment on board and wonder if that was just a failure of the early UHF gear that was intended to net with the TBY? So with all the vibration and violence involved in firing the primary weapons where would something as sensitive as the ships master reference be located?

Ray F, the other RF


-----Original Message-----
From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net<javascript:;>] On Behalf Of Rob Flory
Sent: Wednesday, November 04, 2015 10:23 AM
To: Nick England
Cc: milsurplus
Subject: Re: [Milsurplus] Frequency Measuring Test, What's an LR?

It is indeed a General Radio product.

RF

On Wed, Nov 4, 2015 at 5:34 AM, Nick England <navy.radio at gmail.com<javascript:;>> wrote:

> Photo of BB-55's LR here
> http://www.navy-radio.com/ships/bb55/patch-086.JPG
>
> IIRC this is a General Radio gadget.
>
>
> On Wednesday, November 4, 2015, Rob Flory <farmer.rob.flory at gmail.com<javascript:;>>
> wrote:
>
>> An old buddy who used to hang around on a submarine asked me what an
>> LR is.  Hi Howie!
>>
>> The LR, too big for submarines or casual collectors, is found on
>> larger vessels and shore stations.  I have played with one casually
>> at USS MASSACHUSETTS but was never man enough to really master it.
>> I'm not sure who I admire more, the man who can operate it or the man who can lift it.
>> It dwarfs the RBB and RBC receivers it usually hangs around with.
>>
>> It has a crystal controlled multivibrator that makes harmonics every
>> 100, 20, or 10kc.  In between those points there is an audio beat
>> note meter to tell you the frequency increment from the crystal generated landmark.
>>
>> The LR is patched to the antenna panel where its signal can be
>> patched to receivers to set them up, or to the master oscillators of
>> the transmitters.
>>
>>
>> There is some information here, thanks Nick as usual for your
>> contributions to documentation of this cool old stuff.
>>
>> http://www.virhistory.com/navy/manuals/cemb/cemb05-l.pdf
>>
>> RF
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>
> --
> Nick England K4NYW
> www.navy-radio.com<http://www.navy-radio.com>
>
>
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