David Against Goliath: Estonian Sigint and EW against the Soviet Army During the August 1991 Coup d´Etat Attempt

4. Structur

A secret government  radio communication  workgroup

 Aadu Jõgiaas

   Estonian Border Guard

Amateur radio call ES6PZ

 

Arvo Kallaste

Estonian Radio Amateur Union

 

Amateur radio call ES1CW

 

Priit Andevei

Estonian Rescue Board 

 

                                                       Amateur radio call ES1MM

                                Government Communications Centre team

                             Aadu Jõgiaas (ES6PZ) Tarmo Ränisoo Jüri Kala (ex ES1RNV)

                                    Radio Intelligence and jamming Group

                                                             Lembit Kulmar ES1TAK

                                                                 Hellar Pagi ES1II

                                                             Viktor Repponen ES2RT

                                                              Meelis Tellmann ES1CL

                                                               Tarmo Tölp ES1DK

                                                County Radio Operators

 

Tõnu Taimsaar  ES6QB - Võru

 

 

                                                
                                                   Ilmar Reimann ES4RC - Rakvere

                                                 
                                                    Olavi Tomson ES6RGY - Põlva

                                                         
                                                        Arvo Pihl ES5MC - Tartu

                                                       
                                                     Valeri Kaljagin ES5QA - Valga

                                                       
                                                        Ako Põhako  ES8AY - Pärnu

                                                      
                                                           Andres Ehrlich ES5TX - Jõgeva

                                                  Estonian Rescue Board 

                                                                      Jaak Jõesoo

                                              Felix Habalainen  SK ES1LQ                                                               
                                                           
                                                          

http://raadiosoda.blogspot.com.ee/

 

 

3. Hardware used in Toompea castle (Tallinn, Estonia):

                                                    Portable tranceiver "Angara - 1"

 

 Frequency range: 1,6 - 7,999 MHz, CW and USB mode, 10w 

R - 250M

 

R-250, R-250M and R-250M2 where the most prominent and remarkable Russian short wave receivers. The receiver line produced and modernised from 1948 until 1981.
The receiver was mainly used in soviet and her allied armed forces. Later often found in HAM radio clubstations. 1.5-25.5 MHz in 12 ranges (turret tuner), with optional extension kit four additional ranges up to 33.5 MHz, AM/SSB/CW, optical projection tuning scale.

Tranceiver "Efir - M"

 

Transceiver Efir was produced since the end of 70s of the 20 Century. Bands: 1,8; 3,5; 7; 14; 21 and 28 mc. CW and SSB mode.

 

                                                              HF homebrew amplifier 

 

About 500 Watt output

 

R-311

R311 – “Portable” tube military HF receiver intended for range 1.0 – 15.0 MHz, receives AM, CW and SSB. R- 311s were produced from the beginning of 50 till end of 1970.

R- 311 were used at a radio- intelligence division. Then it was widely used in USSR Army- in tank, in ship, like army headquarter monitoring receiver for receiving routine radiogram, weather forecast, like military training receiver, etc. The receiver works well both with short and long antennas. R- 311 practically has no rustle without an antenna.

 

Homebrew "80m" tranceiver

 

 

 Russian Military Aircraft Receiver R-872.

Frequency range: 100 ... 149.975 MHz 

Technical data: Channels: 100 ... 149.975 MHZ: 2000 

Channel spacing: 25 kHz Modes: AM, FM, Frequency telegraphy

 

R - 123 M

 

Transceiver R-123: military frequency modulated shortwave / VHF transceiver, frequency coverage 20,0 - 51,5 MHz (band 1: 20,0 - 35,75 MHz, band 2: 35,75 - 51,5 MHz, 1261 channels with 25 Khz channel spacing), optical tuning system with frequency projected to a glass plate, operation mode frequency modulated telephony F3, output power 20 Watts.

Baklan - 20   

 

The airborne VHF two-way transceivers are intended for establishing of radio communication (simplex operation) between the crews of airplanes and helicopters and with air traffic controllers of the ground air traffic control services.

Control of the transceiver and setting of the demanded frequency is carried out with the help of the remote control panel. Frequency range: 116.000 to 136.975. Output power min. 16 W, AM mode.

                                       Modernized "Baklan-20"

Frequency range:

136.000 to 157.975 MHz, FM mode, 20 watt

 

Modernized housing "Baklan - 20" 

Frequency range

116.000 to 136.975, Transmitter output power, min 16 W; AM mode.

 

FM Radio Receiver

 

 

Radiostation "Majak"

 

 

Receiver R - 375 "Kaira"

 

                                    
                                               Frequency range: 20 - 500 MHz, spy services

 

 

 R-148

 

 

 

 

is a recent fully transistorized portable radio. It was used on company level. Frequency range: 37.00 ... 51.950 MHz Technical data: Channel spacing: 50 KHz Modulation: FM. HF output: 1 W.

VOLNA-K

The Volna-K is a Russian Navy HF receiver. It was intended as a maritime receiver for the Navy and for commercial shipping.  It is a superheterodyne double conversion HF receiver, using 17 miniature valves, and 2 semi-conductor diodes. The valves have Russian numbers, but are equivalent to common American types. It is intended to receive AM and CW signals down to  0.5 uV levels. The word "volna" translates to "wave". The frequency coverage is 12 kHz to 23 mHz in 9 bands, with gaps around the IF frequencies. There are 3 versions of the Volna-K, each with a slightly different frequency coverage. There is also Volna-P which is the version for submarines.

Radiostation "Palma" 

 

 

 

Radiostation "Лён-БМ"

 

 

R-158

is a modern Russian Portable. It is solid state. I am trying to find out where it was used.

Frequency range: 30.000 ... 79.975 MHz  Frequency displayed by: 4 switches

Channel spacing: 25 KHz. HF output: 1 W Sensitivity: 1 µV Powered by: 12.6 V, internally or externally. Temperature range: - 40 ... + 50 °C

 

"Len - B"

 

 

"Len - B"

 

Homebrew FM tranceiver for 2m band

 

 

 

Portable 2m FM tranceiver 

 

for Prime Minister

 

"R - 123M" 

Primary jammer!