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Voice
The image on the right shows a typical Skanti DS6001 unit that was used
for many years on a fishing vessel. The scrambler measures 37 x 16 x 25 cm
and is housed in a die-cast plastic case, which is identical to the case
of the matching TRP-6000 LF/HF transceiver (see below).
The cryptographic key is set by means of
four hex-switches at the right
hand side of the front panel. Each switch has 16 possible settings,
the numbers 0-9 and the letters A-F,
giving a total of 65,536 key combinations.
The settings can be altered with the up/down push-buttons.
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In order to prevent key initialisation by
an unauthorized person, the settings are hidden behind a black slide-door
that can be locked with a physical key. In the image above, this key
is present in the lock. If ithe lock is in the
horizontal position, the black
cover over the key settings can be opened by
sliding it to the left.
After setting the new key,
the cover should be closed again.
Production of the DS-6000 and its successor the DS-6001 began around
1985 and lasted well into the 1990s. The DS-6001 and the matching
TRP-6000 transceiver were also sold as OEM products under a
variety of brand names.
The case and the front panel were either grey or cream.
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The case of the DS-6001 is identical to that of the TRP-6000 transceiver.
The interior can be accessed by opening the hinged control panel. This is
done by removing the two screws in the upper corners of the front panel.
Folding away the control panel reveils the DS-6001 interor.
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Behind the control panel is a large PCB that holds the various selectors,
switches and indicators. It also holds the AF amplifier that is used for the
connection of the handset.
The main case has three slots for aliminium cassettes in which the
electronics are located. In the DS-6001, only two of these slots are
occupied. The upper slot is taken by the Power Supply Unit (PSU).
The lowest slot holds the actual digital voice scrambler. A wide ribbon
cable connects the two cassettes to the front panel.
It carries power and control signals.
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All cables to the outside world are fed in/out from the rear,
via the gap to the left of the aluminium cassettes.
Power is connected to a contact strip with
screw terminals on the front panel PCB.
The main PCBs are both housed in an aluminium enclosed that provides
sufficient shielding against unwanted emissions.
Due to the universal nature of these cassettes, that are also used
in the TRP-6000 transceiver,
some of the holes at the front are unused.
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The TRP-6000 is a full-duplex LF/HF radio set that was used aboard
fishing boats from the mid-1980s onwards. The TRS-6000 consisted of
a transceiver (exciter) with a power output of 125 mW and a
Power Amplifier (PA) that boosted power up to 200 W (TU-6200)
or even 400 W when using TU-6400 PA.
The receiver had a frequency range from
100 kHz to 4.2 MHz, whilst the range of the transmitter was limited
to 150 kHz - 4.2 MHz.
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The set was used for phone communication in AM and USB.
It was usually mounted in a rack and was operated directly
from the front panel of the units. A telephone-style handset was used
for communication. The image on the right shows a typical TRP-6000 set
as it was used aboard a ship. Photograph courtesy Christiaan Roselaar
(PA3FUN) [2].
The transceiver is microprocessor controlled and has two separate
synthesizers; one for the transmitter and one for the receiver.
20 RX/TX frequency pairs can be stored in the radio's memory.
They can be recalled from the keypad.
In distress situations, a single key-press is enough to select
2182 kHz, the international distress frequency, with the option
to broadcast an automatic 45-second alarm signal.
The separate Power Amplifier (PA) is housed in a double-height
nylon-coated steel case, that can be mounted up to 50 metres away
from the CU (Control Unit). It has temperature controlled fans
and an external heatsink for effecient cooling.
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At the front right of the upper section is the antenna output
with a power indicator (Watt meter) directly below it. The Transmitter
Unit (TU) also contains an efficient electro-mechanical
Automatic Antenna Tuner (ATU) that matches the antenna within
a couple of seconds.
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- RX: 100 kHz - 4.2 MHz
- TX: 150 kHz - 4.2 MHz
- Modulation: AM, USB
- TX power output: 200W or 400 W (without exciter: 125 mW)
- Power supply: 24V, 28A (when used with exciter)
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- CU-6000 Control Unit (holding the receiver and the exciter)
- TU-6200 Transmitter Unit, 200 W
- TU-6400 Transmitter Unit, 400 W
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Skanti was a manufacturer of LF, HF and VHF radio equipment, mainly
for the maritime market, based in Ballerup (Denmark). The full company
name was Skandinavisk Teleindustri, Skanti A/S.
Skanti products were also sold under other brand names, such as
Sailor Radio (SR), SAIT, Furuno, Plessey, Debeg and GE Maritime.
In the late 1990s or the early 2000s, Skanti became part of EuroCom
Industries, together with its partner Sailor Radio.
In June 2004, the Danish company Thrane & Thrane aquired the majority
of shares in EuroCom Industries, giving it control over the well-known
maritime communication brands Skanti and Sailor. Thrane & Thrane already
had strong ties with both brands and continued to expand their product
ranges and privde support and after sales service for existing products [5].
Thrane & Thrane itself was founded in 1981 by Lars and Per Thrane and
employed at one time 600 people. The company specialized in aeronautical,
land mobile and maritime communication systems.
In July 2012, Thrane & Thrane was acquired by Cobham plc and went
on as Cobham SATCOM, the new SATCOM strategic business unit under the
Cobham Aerospace and Security Division [4].
Last known addresses:
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- Skandinavisk Teleindustri, Skanti A/S
Lautrupvang 4
DK-2750 Ballerup
Denmark
Phone: +45 44748400
Fax: +45 44748401
- Skandinavisk Teleindustri, Skanti A/S
34 Kirke Værløsevej
DK 3500 Værløse
Denmark
- Cobham SATCOM
Brook Road
Wimborne, Dorset BH21 2BJ
United Kingdom
www.cobham.com
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Skanti radio stations and voice scramblers were built by Skanti and
it successors for a variety of OEM manufactuers, which is why the same
units are often found under different brand names. So far, we've seen
the following names:
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- Skanti
- SAIT
- Sailor Radio
- Furuno
- Plessey
- Debeg
- GE Maritime
- Thrane & Trane
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We are currently looking for information about the Skanti DS-6001
digital voice scrambler. If you can provide us with any information
whatsoever, such as the user manual and/or the service manual,
please contact us.
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Any links shown in red are currently unavailable.
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© Crypto Museum. Created: Saturday 07 January 2017. Last changed: Saturday, 24 February 2018 - 20:46 CET.
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