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Covert Radio Nagra
Credit Card Transmitter
- wanted item
The Nagra CCT is a ultra-miniature body-wearable narrow-band
VHF transmitter
in the shape of a credit card, released by
Nagra Kudelski
in Romanel (Switzerland) in September 2013.
It is seen as a complementary device to
Nagra's highly successful
Credit Card Recorder (CCR),
and is only
available to selected law enforcement and intelligence agencies.
The device is also used by the US Department of Defence and is
known by its National Stock Number NSN 5820-01-651-6863 [5].
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The image on the right shows a selection of Nagra CCT devices,
as they are shown in their brochure [A]. The device has the
size of a credit card and is just 1.5 mm thick.
It can be printed with any image, so that it can be disguised
as a regular chest-worn identification badge,
making it good enough to fool the casual observer.
Despite the fact that the exact specifications are classified, some
intersting details have leaked out through official US Government
procurement tenders, as listed below.
The device operates in the regular 138 - 174 MHz band (FM)
and can be received with any regular surveillance receiver.
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The Nagra CCT was introduced shortly after the Credit Card Recorder (CCR)
and is based on the same design principle. Its output power is
programmable between 0.6 mW (-2dBm) and 20 mW (+13dBm), whch should
be sufficient for an operational range of approximately 100 metres.
The diagram above shows the location of the microphone, the capacitive
ON/OFF sensor and the LED indicator. The contact pads are identical to
those on a smart card, but are used here for connection to the docking
station. They are used for data transfer and battery charging.
The reverse side of the credit card (i.e. the front) can be printed like
a regular credit card or ID badge.
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The Nagra CCR is generally used in combination with a USB docking
station, that is used for charging the internal LiPo-battery,
downloading the audio data stored on the card and changing any of
the internal settings. In addition there are several chargers
for single or multiple cards.
According to the brochure [A], the following set of accessories was
available in 2014. The same accessories can be used with Nagra's
earlier covert body-wearable
Credit Card Recorder (CCR).
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CCR-DS Docking station (USB) CCR-DS-2 Single docking station (USB) with two extra slots for charging CCT Credit Card Transmitter (with example print) CCT-CC Mobile charger for one CCR or CCT card CCR-MCC Charger for five cards
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Although the Nagra CCT is not featured on the Nagra website and its
brochures are only supplied to approved customers, the Russian version
of the brochure can be downloaded freely from the internet [A].
From the photographs and descriptions in the brochure, we can
make a few guesses. The diagram below shows the interior of the
Nagra CCR as seen from the front. About 2/3 of the available space
is taken by the rechargable LiPo battery. The remaining 1/3 is for the
actual PCB.
The PCB measures 30 x 50 mm and is soldered directly to the
battery terminals. At the bottom right is the capacitive ON/OFF
button, whilst the ON/OFF LED is close to the top left.
A subminiature
MEMS microphone is located at the top right. Sound is guided to the
microphone via three small holes with a diameter of just 50 µm.
At the top left is the main controller.
At the centre is the actual transmitter. On the Nagra CCR recorder,
this space is taken by a 4GB Micro SD card [A].
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Size 85 x 54 x 1.5 mm Weight < 5 g Power 5V via USB, cigarette lighter 9-16V DC (2W) Frequency 138 - 174 MHz Spacing 12.5 kHz Modulation FM (frequency modulation) RF output -2dBm to +13dBm (0.6 mW - 20 mW) software adjustable Range ± 100 metres Battery LiPo, Between 2 and 6 hours (depending on power output) Standby 2 months Charge 90 minutes Clock Internal real-time
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© Crypto Museum. Created: Sunday 15 January 2017. Last changed: Wednesday, 20 October 2021 - 08:11 CET.
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