[GreenKeys] A Little More TWX History

[Harold Hallikainen]

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I remember the DeskFax. I think there was some amateur use of it. I think
WU intended it as a low cost replacement for messengers. But, the fax
image, as mentioned below, only went from the local WU office to/from the
customer and not customer to customer. These faxes were pretty slow, so
using them for long distance would have been expensive. Even when fax
machines were introduced, as I recall, it took 7 minutes to transmit a
page using analog FM on the phone line with no compression.

I used to do contract work for Alden (I think that's the company name) in
MA. They made wet paper fax machines for distributing weather maps to the
FAA Flight Service Stations. This was linear FM over a phone line. A
rotating drum with a helix on it provided horizontal scan while the paper
was pulled up by another motor. The helix would pass current through the
paper to turn it brown.

There is still weather fax on HF. You can hear it and see the resulting
weather map at http://kphsdr.com:8076/ on a Kiwi SDR. Under extension,
select FAX. In the fax decoder window, select a station in a region. Right
now I'm listening to  Station: Pt. Reyes, NMC US which is at the same site
as KPH, which is where this SDR is.

Harold


> WU used their FAX - the Deskfax - as a way to speed Telegrams from and
to customers ONLY. There was no implementation of a business to business
solution.
>
> Sent from my iPhone
>
>> On Nov 26, 2019, at 9:32 PM, Jeffrey Angus <jdangus at att.net> wrote:
>>
>> Another thing that did it in.
>> "But we've always done it this way."
>> Darwin works just as well in industry as it does in life.
>>
>> --
>> "I am a river to my people."
>> Jeff-1.0
>> WA6FWI
>> www.foxsmercantile.com
>>
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> http://mailman.qth.net/archive/greenkeys/greenkeys.html
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> http://comcents.com/tty/greenkeyssearch.html
>
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> Please help support this email list: http://www.qsl.net/donate.html
Message delivered to harold at w6iwi.org
>


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