|
|
|
|
|
|
|
RX CIA Bugs SRR-8 → ← SRR-4
The receiver measures 30.5 x 27.5 x 10.8 cm and weights just under 9 kg.
It can be powered by internal batteries or by the 88-264V AC mains.
It features two separate tuners: one for the 50-200 MHz
range and one for the 200-400 MHz range, known as the LOW and HI bands.
The desired band is selected with the BAND-switch and
each tuner has its own antenna input at the front panel. For short-range
reception, the supplied telescopic antenna, mounted at the top right,
can be used. Alternatively,
an external VHF or UHF antenna, or a car antenna can be used.
|
|
|
|
Although it is not recognised as such, the SRR-5 is featured in
H. Keith Melton's excellent book Ultimate Spy [1], where it is
appropriately described as a listening post
receiver. Although the SRR-5 was commonly supplied with a black front panel,
the one in the book has a white front panel and a blue case shell.
The SRR-5 was produced in limited quantities from the early to the
mid-1960s by Radio Receptor Company Inc. in New York [4].
It was commercially available to approved customers (e.g. law enforcement)
only, and was later complemented by the SRR-8.
|
-
The Technical Services Division (TSD) of the CIA was renamed
Office of Technical Service (OTS) in 1974 [2].
|
LOW 49-204 MHz HI 204-404 MHz
|
|
The following accessories are currently known:
|
Although Crypto Museum does not have an SRR-5 receiver in its collection,
we do have access to its technical manual and som eof its test sheets,
which are available for download below
[A].
The manual consists of a global description of the device, a description
of its operation, a technical description of each sub-circuit,
a block diagram,
and full circuit diagrams.
➤ Download the technical manual
|
|
|
Below is the simplified block diagram of the SRR-5 receiver.
At the left are the two independent tuners: one for the LOW
band (50-200 MHz) and one for the HI band (200-400 MHz).
For each tuner, the frequency of the local oscillator (LO) is
16.5 MHz higher than the received signal.
|
|
The model number SRR-5 should not be confused with the AN/SRR-5, which
is a radiation monitor used by the US Navy. Please note that AN/SRR-5 is
a military designator, whilst 'SRR-5' is a typical CIA designator.
The two devices are in no way related.
|
Device Surveillance receiver Purpose Interception, monitoring, reception of bugs Model SRR-5 Design TSD (CIA) Manufacturer Radio Receptor Co. Inc., New York (USA) Predecessor SRR-4 Successor SRR-8 Frequency 49-204 MHz Bands 2 (see below) Modulation AM, FM, CW, MCW Dimensions 305 × 275 × 108 mm Weight 9 kg
|
-
Image reproduced here by kind permission from Keith Melton, November 2017.
-
Declassified in part and approved for release 5 December 2014:
CIA-RDP78-03153A000700020015-9.
Although the name of the company is redacted in the document, it is
present in the
original CIA file title
[3].
|
|
|
|
Any links shown in red are currently unavailable.
If you like the information on this website, why not make a donation?
© Crypto Museum. Created: Friday 25 November 2016. Last changed: Monday, 15 July 2024 - 08:24 CET.
|
 |
|
|
|
![SRR-5 receiver as show in [1]](img/srr5_ultimate_spy.jpg)
