[Milsurplus] AN/UGA-1 Mux, know it ?

[Nick England]

Ok one more time-
AN/UGA-1 is NOT repeat NOT a frequency-division multiplex system.

UGA-1 is a time-division multiplex device that has 16 synchronous serial
teletype signals on one side and a single serial time-compressed stream on
the other side. All digital teletype signals. The time-compressed stream
interfaces to a crypto system that processes sixteen serial characters in
the same time as one 100wpm character.

On the 16-channel side the UGA-1 connected to a separate device such as
AN/UCC-1 which IS a frequency-division multiplexer providing VFCT (voice
frequency carrier telegraphy) to run comms over wireline, HF, UHF,
microwave etc.

If you aren’t tired of this topic yet, check out my pages full of TTY
multiplexer info at
https://www.navy-radio.com/rtty-mux.htm

Cheers
Nick K4NYW

On Thu, Dec 7, 2023 at 6:32 PM W2HX <w2hx at w2hx.com> wrote:

> Yes they were designated LLSB and UUSB.
>
> Sent from Nine <http://www.9folders.com/>
> ------------------------------
> *From:* Francesco Ledda <frledda at att.net>
> *Sent:* Thursday, December 7, 2023 6:05 PM
> *To:* Nick England
> *Cc:* milsurplus at mailman.qth.net
> *Subject:* Re: [Milsurplus] AN/UGA-1 Mux, know it ?
>
> No, the TSC-60 is not VHF or UHF. It is HF with 4 sidebands. These are the
> two standard SSB sidebands and two other sidebands above the traditional
> SSB sidebands! This kind of systems were used by all services. In the early
> 90s, the UCC-3 was replaced by modern digital modems!
>
> Best, Francesco K5URG
>
> Sent from my iPhone
>
> On Dec 7, 2023, at 15:39, Nick England <navy.radio at gmail.com> wrote:
>
> 
> BTW the UGA-1 talked to the crypto system on one side and to a 16-channel
> frequency division multiplexer on the other side which was used for HF RTTY
> - 85 Hz shift on 170 Hz centers was standard for the fleet broadcast and
> other HF RTTY.
> https://www.navy-radio.com/rtty/ucc1/ucc1-sys-31.JPG
>
> Nick England K4NYW
> www.navy-radio.com
>
>
> On Thu, Dec 7, 2023 at 4:25 PM Nick England <navy.radio at gmail.com> wrote:
>
>> Time-division multiplexer for use with TSEC/KO-5 crypto gear - it
>> interfaces with 16 channel frequency-division multiplexer for RTTY.
>>
>> https://www.navy-radio.com/crypto/KO5CSP6620A-02.JPG
>>
>> FUNCTIONAL DESCRIPTION The AN/UGA-1 is designed to accept multiplexed
>> output of sixteen (16) channel multiplex equipment and divides it into
>> sixteen (16) separate channels which are synchronously related to each
>> other. Output on each channel is in six (6) unit synchronous signal. The
>> receive portion of the equipment performs companion function.
>> RELATION TO OTHER EQUIPMENT The AN/UGA-1 is designed to be used with but
>> not part of AN/UGC-3() for use on frequency division telegraph systems.
>> TYPE OF DIVISION: Time-division type.
>> TYPE OF OPERATION: Neutral.
>> TYPE OF ACTUATION: DC actuated.
>> NUMBER OF CHANNELS: 16.
>> NUMBER OF WORDS PER MINUTE: 60, 75, 100 words per minute per channel.
>> RELATION OF CHANNELS INPUT AND OUTPUT: The 16 channel inputs and outputs
>> are synchronous in nature and are synchronously related.
>>
>> The KO-5 crypto system is a monster-
>> https://www.navy-radio.com/crypto/KO5CSP6620A.pdf
>>
>> Nick England K4NYW
>> www.navy-radio.com
>>
>>
>> On Thu, Dec 7, 2023 at 4:11 PM Hubert Miller <Kargo_cult at msncom
>> <Kargo_cult at msn.com>> wrote:
>>
>>> Anyone familiar with the USN UGA-1  16 channel TTY multiplexer, used
>>> with the UGC-3 radio ?
>>>
>>> I have a large ‘Teletype Corporation’ preliminary instruction book, and
>>> man does it look “prelim”,
>>>
>>> with lots of sort of unpolished drawings. Lots of transistors. This must
>>> be for a VHF system, right,
>>>
>>> or they couldn’t put that many channels on a signal ? Can someone give
>>> me the short version of
>>>
>>> what this system was about ? Date on manual, 1960.
>>>
>>> -Hue Miller
>>>
>>> Newport, Oregon
>>> ______________________________________________________________
>>> Milsurplus mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Milsurplus at mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>>
>> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20231207/27e4dd15/attachment-0001.html>