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ACACIA
Body wearable covert radio - under construction

ACACIA-1 1 (Russian: АКАЦИЯ-1), was a miniature solid-state body-wearable self-contained two-way covert VHF transceiver, developed in the late 1970s in the Soviet Union (USSR) for use by Soviet intelligence services like the KGB. It was used for observations, surveillance, VIP protection and other covert operations. The device is also known as AK PPR-1 (Russian: АК ППР-1).

The radio is extremely small for its age, approx. twice the size of a pack of cigarettes, and can easily be hidden under the operator's clothing, for example in one of the pockets or in a strap around the neck. It is powered by an internal cylindrical rechargeable 12.5V battery pack.

The device can be fitted with 5 channels in the 2-metre VHF/H band and has a combined microphone/speaker that should be hidden under the collar of the coat. The transmitter is operated by pressing one of the large round push-buttons on the front face of the device.
  
Acacia coert radio with microphone/speaker and vibrator

The other large push-button is for broadcasting a call-tone that activates the vibrator of other Acacia radios in the network, so that its operator is alerted about an incoming call. The device can optionally be fitted with a wired remote control unit (not shown here). When this expansion unit is omitted, a shorting plug should be fitted in the socket (as with the device shown here).

  1. АКАЦИЯ, pronounced ACACIA or AKATSIYA, is the Russian name of a plant.

Acacia with microphone/speaker, vibrator and wire antenna
Acacia coert radio with microphone/speaker and vibrator
Acacia covert radio
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Acacia with microphone/speaker, vibrator and wire antenna
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Acacia coert radio with microphone/speaker and vibrator
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Acacia covert radio

Features
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Parts
Body-wearable transmitter-receiver
Microphone/speaker
Vibrator
Rechargeable NiCd battery
Cloth harness for carrying Acacia on the body
Transceiver
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Acacia covert radio

Microphone/speaker
...   

Vibrator
...   

Battery
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Harness
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Interior
...

Technical specifications
According to some websites, the specifications of this radio are still classified [2]. Here is what we know so far:

  • Design
    USSR, Russia
  • Year
    Late 1970s or early 1980s
  • User
    KGB
  • Purpose
    Surveillance, observations, VIP protection
  • Frequency
    VHF 2-metre band, 148-150 MHz
  • Modulation
    FM
  • Channels
    5
  • Power
    12 - 12.5V (internal battery)
  • Battery
    Consisting of 10 x 1.2V, 550 mAh NiCd cell
Accessories
  • S-9 transceiver (main unit)
  • Wire antenna (with sefety pins)
  • Manipulator (remote control)
  • Microphone (with safety pin)
  • Speaker (with safety pin)
  • Vibrator
  • Body harness (or carrying pocket)
Missing
  • Remote control unit
  • Operating instructions
  • Technical description
  • Circuit diagram
References
  1. USSR Special Forces Intelligence Secret Radios, C9 (АКАЦИЯ)
    Website (Russian). Retrieved July 2016.

  2. Russian FM Project, Radio Station Acacia S-9
    Website (Russian). Retrieved July 2016.

  3. Louis Meulstee, Acacia-1
    Wireless for the Warrior, Volume 4, Supplement, Chapter 186.
Further information
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Crypto Museum. Created: Thursday 07 July 2016. Last changed: Friday, 26 March 2021 - 17:12 CET.
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