[GreenKeys] Teletype
Dave F via GreenKeys
greenkeys at mailman.qth.net
Sun May 11 23:20:59 EDT 2014
Andy and Group:
Can't speak for the Navy in Europe, but I can speak for the US Army,
particularly all over Germany during the Cold War era. I had three tours
there all in different types of units (1965-68; 1976-79; 1985-88)
RATT and CommCenters for many years used the same type of
equipment: Kleinschmidt TT-98s and TT-76s, with CommCenters having
a much larger selection of equipments than the RATTs.
Most fixed-station CommCenters ran their teletype gear (in Germany anyway)
on 220 Volt, 50 cycle AC electric current for 60, 66 or 100 wpm operation.
All
US-built teletype gear (mostly Kleinschmidt and Teletype Corp, and some
later model Singer, NCR, & Bendix equipment also ran on 220V/50 cycle.
Crypto
gear ran the same way. This was German Commercial Power. As German
Commercial Power was pretty reliable, we often did not have back up
generators, except in the larger stations (Tape Relays, and Switching
Centers).
In a field or tactical setting (usually in vans), different equipment was
used,
(same brands), but it ran on generators, with standard US 110V/60 cycle
power. Depending on the unit, one could find 5KW, or 10KW dual gasoline
generator
sets mounted on their own trailers which were then pulled by the assigned
vehicle for the equipment. In larger units, one might have some really huge
generators 600KW monsters which were diesels (for powering an entire
Field Signal Center (or a small city or town).
(Once, in a US-based unit, the Army leased an E-8A diesel locomotive from
UP
which was used for temporary power, since all diesels are essentially
electric
generators anyway).
Most of the Kleinschmidt teletype gear was the same, just configured
a bit differently, and each type had either synchronous or asynchronous
motors, depending on where they were to be used. All of this equipment
could be easily cross-converted by teletype maintenance in case a
field set of equipment had to be moved to a fixed-station, or a piece of
fixed-station equipment had to be moved to a field site.
In the 60s, we also had Siemens T-100s in the fixed stations and
these ran on German 220V power (there were also a couple of LO-15
and LO-15Cs, also on 220V). (The LO-15 is a German-built and
licensed version of the Model 15; The C model was the Model 19, but
in a much snazzier light green cabinet, with a German TD, not the
US stand-alone TD).
Most of the Teletype Corp equipment (Model 28s, aka: AN/FGC-58s
and later AN/FGC-171s (AUTODIN) pretty much stayed wired up for
220V and not a lot of this equipment went to the field.
AN/UGC-4s worked both fixed (220V) and tactical (110V). These
were usually permanent installs, so equipment was not switched from
one use to another.
Model 40s were used mostly in fixed-stations, and ran on 220V. A
few were tested in tactical vans using 110V generator power, but they
did not work well in the field, so we went back to Kleinschmidts until
the AN/UGC-74s arrived
We had a number of Kleinschmidt TT-98s and TT-76s that could
run on 24V if the vehicle (prime mover) was equipped with a "100 Amp
Kit", a device which used the vehicles engine for electric power. 100
Amp Kits were usually installed on some M880 trucks, Gamma Goats,
five-quarters (5/4s), and other smaller wheeled trucks. Such kits were
not used on larger trucks, such as the M-35A1/A2 series deuce and
a halfs (2 1/2 ton trucks), 5 tons, etc, nor were they used on Army
commercial-type trucks, such as some of the International Harvesters
that some units had (non-tactical trucks). The 100 Amp Kits were
usually installed in the wheeled vehicles engine compartment (i.e. under
the hood).
For tracked vehicles which carried tactical RATT assemblies, such
as the M-577 APC "Command Track", a 4.2 generator was mounted on top
of the APC and provided 24V. The APCs RATTs usually consisted of
the same Kleinschmidt gear (TT-98 and TT-76s), + KW-7s and later,
KG-84s.
All of these 100 Amp Kits could only be used when the vehicles were
in a stopped position (not moving). They were intended for short-use
duration, but we often used them for weeks at a time in the field (and
the vehicle mechanics really hated it when we did that, as such use
was hard on (wheeled) vehicle engines.
The rationale with the 100 Amp Kits was that not all units were issued
trailer-mounted generator sets, particularly in the US Army's Infantry
Battalions or Airborne units (aka: (maneuver battalions) where speed
and being highly mobile were absolute requirements (could not be
hindered with heavy equipment that had to be dragged around).
Hope this helps,
Dave
DE RUMLNHA
CommCenter Group
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In a message dated 5/11/2014 11:15:49 A.M. Eastern Daylight Time,
asekely at hotmail.com writes:
>>Curious, it is 60 cycle. Did the DOD use their own 60 cycle power in EU
?<<
Yes in many fixed stations were Generator powered. all the RTTY eq was
powered by portable Generators.
... the TT47 is equiped with a series governed motor. the cycle (hz) rate
did not atter as long as the
govenor was set at 3600 rpm... (tuneing fork or if you were lucky a
strobe-o-scope)
at 50hz though it did increase the importance of the monthly maintenance.
the nomen tag shown looks as if this was a machine manufactured for or
sold in Switzerland.
(The "NOBsr-xxxxx" serial number and the "xxxx:CTT" = Swiss Telegaph
(Postoffice) asset number?)
Andy
____________________________________
Date: Sat, 10 May 2014 09:20:19 -0700
From: pete at petelancashire.com
CC: GreenKeys at mailman.qth.net
Subject: Re: [GreenKeys] Teletype
Curious, it is 60 cycle. Did the DOD use their own 60 cycle power in EU ?
On Sat, May 10, 2014 at 1:24 AM, delirio <_delirio71 at gmail.com_
(mailto:delirio71 at gmail.com) > wrote:
Hello everyone ... sorry for my english .... I'm Max and I live in Italy
... I found an old warehouse in 1 teletype mod.28 and tt-48a/tg, look at the
attached photos.
If anyone is interested in the piece or the entire contact me.
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