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CIA
The device has a diameter of 41 mm and is 23 mm thick, which was considered
very small at the time. It was first publicly disclosed in 1957 in the article
Secrets of the Electronic Snoopers in the October issue of Popular
Science [2]. In the article, several examples of the wired use of the
device are given.
Due to its low-impedance nature, it can be connected to a recording device
several hundred metres away without picking up hum or noise from nearby
electricity cables [2].
The DD-4 is also mentioned in the book Spycraft by H. Keith Melton and
Robert Wallace [3 p. 46].
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In the Autumn of 1955, a technician working for the DCI security detail,
installed several covert microphones in the newly built suite for the Director
of Central Intelligence (DCI) in Washington.
They were wired directly to a recording room elsewhere in the building.
One of the microphones was hidden behind the ceiling right above the DCI's
desk. it was rediscovered 15 years later, in 1970, after the CIA had
abandonned the building and moved to Langley. The building was then assigned
to the CIAs Technical Services Division (TSD).
When a technician removed one of the acoustic tiles in the
ceiling, he found the DD-4 hanging by its (now unconnected) wires [3 p.487].
Another example of the use of DD-4 microphones in the mid 1950s,
is during the CIA's research program MKULTRA 1 — a secret mind-control
and interrogation research program run by the Office of Scientific Intelligence
(OSI) [4].
As part of the sub-project Operation Midnight Climax,
the CIA established a brothel 2 in the
San Fransisco bay area to covertly test the effect of drugs — in particular
LSD — on the behaviour of unwitting visitors of all social backgrounds [5].
Hired technician Bill Hawkins, at the time a 24 year old student at UC Berkeley,
installed several DD-4 microphones behind false wall sockets and two-way
mirrors. They were used for recording [6][7].
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Also written as MK/ULTRA, MK-Ultra and MKUltra.
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A rented appartment at 225C Chestnut Street in Los Angeles.
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Not to be confused with Richard Condon's 1959 novel
The Manchurian Candidate, that was adapted into a feature film twice:
in 1962 and in 2004.
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© Crypto Museum. Created: Sunday 27 August 2023. Last changed: Monday, 28 August 2023 - 05:44 CET.
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