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Receivers RFT Stasi
The 2170 was the successor to the 2070 series
and had the advantage that it could be remotely controlled.
As the 2170 was heavily used by the Stasi for intercept
of domestic and foreign radio signals, it is also known as the
Stasi Receiver.
The 2170 consists of three main building blocks: a receiver unit (EE),
a control unit (BE) and a power supply unit (SE).
It covers all frequencies in the VHF and UHF band
from 25 MHz up to 1 GHz in CW (A1), AM (A3) and FM (F3).
The three building blocks are each housed in its own sub-rack,
mounted together in a single enclosure.
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The upper part contains the power supply unit (PSU). It consists
of several modules each of which is responsible for a specific voltage.
The mains power switch is at the top right.
The section in the middle is the actual receiver. It consists of
three modules: RF, IF and demodulator, each of which can be
swapped easily if a different frequency range or bandwidth is required.
The 2170 was developed between 1981 and 1985 as the successor to
the 2070, which was widely used in the Stasi monitoring stations.
The receivers were manufactured in small quantities
from 1985 until the fall of the
Berlin Wall in 1989.
It is currently unknown how many units were made.
After the reunification of Germany, 3 the remaining stock of
receivers was sold by BHS Elekronik GmbH
in Calbe (Germany) [B][C].
The 2170 shown in the image above was recovered from
the Stasi operations center in Berlin-Lichtenberg,
right after the fall of the
Berlin Wall in 1989 [1].
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In the model number 94170, the prefix 9 indicates development
at Aussenstelle Beucha (ASB) or ITU.
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Funkwerk Köpenick had its headquarters in Berlin (DDR)
with a production site in Calbe (DDR).
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After WWII, Germany was divided in West-Germany (BRD) and
East-Germany (DDR). Following the fall of the Berlin Wall
in 1989, the two countries were re-united in 1990.
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Please note that this page is currently under construction
and that new information will be added as and when it becomes
available. The circuit diagrams are now
available in poor quality.
If you have any additional information about this receiver,
its use and/or its users, please contact us.
The receiver consists of three modules: the RF stage, the
IF stage and the demodulator. The AF stage is part of the control unit.
These three modules can be swapped easily by pulling them out
of the sub-assembly frame from the front.
The receiver covers all frequencies between 25 MHz and 1 GHz,
divided over 14 ranges that are spread over 5 different plug-in
units (modules).
The lower part is the control unit where all controls and read-outs
are nicely arranged. It is constructed in such a way that the entire
2170 unit can be placed on a table in front of the operator.
The frequency can be adjusted at the bottom left of the control unit.
Depending on the model, a jog dial or a toggle lever is used.
In practice, most operators preferred the toggle lever.
It allows the frequency band to be search with a speed proportional
to the position of the lever.
At the center of the control unit is the
digital frequency readout. At the right is the AF amplifier with a
small speaker at the front. A DIN socket at the front allows a
pair of headphones to be used instead of the built-in speaker.
Due to the modular construction, it was possible to adapt the
2170 for a variety of applications, frequency ranges, bandwidths,
modulation arts, etc.
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Two versions of the receiver were available: (1) with up/down buttons
for frequency adjustment, and (2) with a proportional jog-lever
as shown in the image above. The latter was typically used for
surveillance.
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- SE - Stromversorgungseinheid (Power Supply Unit, PSU)
- EE - Empfangeinheit (Receiver Unit, RX)
- BE - Bedienungseinheit (Control Unit, CU)
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Remote Control Unit
92170/B
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The 2170 is housed in a heavy 19"-like metal enclosure with all controls
at the front and all connections at the rear. At the left and right sides
is a handle that allows it to be lifted by two persons.
The case consists of three sub-assemblies: the PSU, the
receiver (RX) and the control unit (CU). Each sub-assembly is housed
in its own rack that can be extracted by removing the 4 bolts at
the edges (2 at either side). The sub-assembly can than be pulled
from the main case.
Each sub-assembly consists of a number of (removable)
plug-ins or modules.
Each module has a EFS-58/AB connector at the rear that connects it
to a socket in the sub-assembly frame. The sub-assembly itself
is slotted into the main enclosure and is connected to the other
sub-assemblies by means of another set of connectors at the rear, that are
permanently wired inside the case.
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The following RF plug-in units are available:
- 2170 HF
- 25 - 36.5 MHz
- 36.5 - 53 MHz
- 53 - 67 MHz
- 67 - 87 MHz
- 2170 HG
- 87 - 108 MHz
- 108 - 144 MHz
- 144 - 174 MHz
- 174 - 240 MHz
- 2170 HC
- 240 - 320 MHz
- 320 - 400 MHz
- 400 - 480 MHz
- 2170 HD
- 480 - 680 MHz
- 2170 HE
- 680 - 820 MHz
- 820 - 1000 MHz
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The following bandwidths can be selected on the IF unit:
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- 3.2 kHz
- 7.5 kHz
- 12 kHz
- 30 kHz
- 300 kHz
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The following people have contributed to this page and to the
restoration of our 2170 receiver:
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- Peter Blümer
- Karsten Hansky
- Cor Moerman
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- Paul Reuvers
- Marc Simons
- Detlev Vreisleben
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Estimated date, based on the use of an old (DDR) telephone number,
which was valid until 15 April 1992,
plus the fact that BHS Elektronik was registered
as a GmbH (Ltd) on 11 September 1992. Until that date it was a
GmbH i.G. (Ltd. in formation) [4].
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The quality of these scans is sub-standard, but it's all we've got.
The files have been recovered from the Heinz Lissok legacy and have been
scanned at 200 dpi.
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© Crypto Museum. Created: Friday 03 May 2013. Last changed: Friday, 03 February 2023 - 16:29 CET.
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![Remote Control Unit 2170/B. Pgotograph by Detlev Vreisleven [5].](img/2170b_large.jpg)
