[GreenKeys] yea bay has LRSB 28 series serial to parallel conv? mechanical style!

[Nick England]

I don't know who ended up with Jack's M28 receiving selector (LRS) but I've
just received and scanned the tech manual (276B) which includes
description, theory of operation, adjustments, and lubrication-
http://www.navy-radio.com/manuals/tty/276b-6210.pdf

cheers,
Nick England K4NYW
www.navy-radio.com

On Sun, Nov 22, 2015 at 2:20 PM, Nick England <navy.radio at gmail.com> wrote:

> LRSB is the base - LRS is the receiving selector mechanism. Sorry I don't
> have a manual (276B and 573-138-100TC?), but the wiring diagram is here -
> http://www.virhistory.com/navy/manuals/tty/573-138-400-6112.pdf
> I found a spec sheet here -
> https://en.wikipedia.org/wiki/Teletype_Model_28
>
> The LRSB base was also used for the LD transmitting distributor which was
> the parallel-in, serial-out counterpart to this LRS serial-in, parallel-out
> device.
> http://www.virhistory.com/navy/tty/td/lrsb-01.bmp
>
> These were handy devices in a semi-automatic tape relay system
>
> There were M35 8 level versions as well.
>
> Here's the brief description of the LRS from the WE RS specs -
> 28A Receiving Selector (Teletype LRS2)
> Specification RS-581.0
> Section 23S
> Page 1
> 6- 20 - 62
> This selector, designed for mounting on a 28A Mounting and Cover Assembly
> [LRSB to us Teletype guys], is utilized to convert a 5 level sequential
> teletypewriter signal into an equivalent parallel output.
> Features of this unit include the following:
> 1. - A receiving selector for accepting serial teletypewriter signals .
> 2 . Transfer type code reading contacts with two auxiliary contacts for
> parallel readout.
> 3. Termination of internal wiring through a cable at a 36 terminal
> Amphenol Receptacle which is to be mounted on the 28A Mounting and Cover
> Assembly [LRSB].
> 4. Provision for operation at 60, 75 and 100 words per minute through use
> of 28G, 28H and 28J Motor to intermediate sets of gears respectively.
>
> Cheers,
> Nick England K4NYW
> www.navy-radio.com
>
> On Sun, Nov 22, 2015 at 10:13 AM, W2HX <w2hx at w2hx.com> wrote:
>
>> Interesting indeed. I found references to it, but no manual per se.  I
>> wonder how this worked on the output side? Was there 5 bits plus some kind
>> of a strobe/data ready line to signal the parallel-side equipment that the
>> data was ready? And does anyone know what sort of parallel equipment/device
>> was used? Early computer? Parallel messaging system?
>>
>>
>>
>> *From:* GreenKeys [mailto:greenkeys-bounces at mailman.qth.net] *On Behalf
>> Of *Ed Sharpe Archivist for SMECC via GreenKeys
>> *Sent:* Sunday, November 22, 2015 1:49 AM
>> *To:* greenkeys at mailman.qth.net; couryhouse at aol.com
>> *Subject:* [GreenKeys] yea bay has LRSB 28 series serial to parallel
>> conv? mechanical style!
>>
>>
>>
>>
>>
>> yea bay has LRSB  28 series  serial to parallel conv? mechanical style!
>>
>>
>>
>>
>> http://www.ebay.com/itm/TELETYPE-LRSB-Receiving-Selector-Ham-Radio-RTTY-/291621779913
>> ?
>>
>> looks  like one more thing  for the 28  completest!  Can anyone revel us
>> in tales about this  device!?  Ed#
>>
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