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EDI CIA FBI M-75B → ← UMY-25
Covert miniature tape recorder
- this page is a stub
M-60 was a covert miniature body-wearable open reel
audio tape recorder,
introduced in 1967 by Electro Data Inc. (EDI)
in Fort Lee (New Jersey, USA).
The device is nearly identical to the UMY-25
which was developed in 1962
especially for the US Central Intelligence Agency
(CIA). In 1966, when the CIA switched to
Nagra tape recorders, the UMY-25
was released to the free market as the M-60 [1].
The device was short-lived and was succeeded the same year by the
M-75B.
The M-60 (mono) and B-60 (binaural, stereo) were anounced in an article
in Electronics Illustrated of July 1967 [1], but at the time
of printing the devices were not yet available for testing. According to the
article, they were still in production.
The specifications listed below are taken from this article and had been
provided by the manufactuer (EDI).
So far, we have never seen the M-60 or B-60 models. It is
entirely possible that the devices were short-lived,
or that by the time they were released – late 1967 – the stereo version
had meanwhile been renamed M-75B.
For further details about this device, such as photographs, circuit diagram
and background information, please refer to our page about the
EDI M-75B, which is believed to be (nearly) identical to the
B-60 — the stereo version (M-60).
➤ More about the EDI M-75B
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M-60 Mono version B-60 Binaural version (stereo)
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Device Miniature covert body recorder Purpose Covert recording and evidence gathering Format Open reel magnetic tape Manufacturer Electro Data Inc. (EDI) Model see below Year 1967 (July) Country USA Predecessor UMY-25 (CIA) Successor M-75B Tape Standard Speed 4.75 cm/s Volume AVC Erease No (use bulk ereaser) Batteries 1 × Mallory RM630 (1.4V), 1 × Mallory RM822 (1.4V) Duration 35 hours Enclosure Anodised aluminium Dimensions 130 × 72 × 25 mm Weight 225 g
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Model M-60 Channels 1 (mono) Transistors 13 (eq.) 1 Price US$ 345 (1967)
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Model B-60 Channels 2 (binaural, stereo) Transistors 26 (eq.) 1 Price US$ 585 (1967)
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Equivalent number of transistors — most transistors are contained
in the WC183 integrated circuit (IC) [a][b].
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© Crypto Museum. Created: Tuesday 12 March 2024. Last changed: Saturday, 30 March 2024 - 10:37 CET.
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