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Germany France Cold War Telefunken ← ESK-52
Like its predecessor,
the design of the ESK-632 is based on the wartime
British Type 3-Mark II (B2).
For security reasons, both transceivers were listed as
Amateurgerät (amateur device).
The exterior and the internal circuits are nearly identical to those
of the ESK-52. The difference is the addition of an AM modulator
that made it possible to use the rig for phone conversations.
This is visible at the centre of the front panel, between the
knobs E11 and E13. The ESK-632 has a
6 mm jack for a microphone, and a switch
to select between microphone and morse key.
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The ESK-52 only has a socket for a morse key
at this location. Depending on the application, the ESK-632 came
as a bare device — as shown above — or in an unobtrusive travel
suitcase, or in a rugged wooden transit case.
For further information, please refer to our page about the
ESK-52.
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Device Suitcase spy rado set Purpose Agent communication Model ESK-652 Year 1954 Manufacturer Telefunken, Hannover (Germany) User French intelligence, French stay behind Predecessor ESK-52 Mains 85 - 234 V AC, 40-60 Hz Battery 6V DC Vibrator NSF 32 - 2 NT 6 Parts 3 (transmitter, receiver, PSU) Dimensions 585 × 350 × 170 mm (suitcase)
430 × 320 × 150 mm (bare radio set) Quantity 100-200 (est.)
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Frequency 1.4 - 9 MHz (1.4 - 4.5 MHz with doubler) Output 20W (15W when battery powered) Modulation CW, AM Impedance 600 - 1000 Ω Valves 6AG7, 6L6G, 2 × ECC81
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Frequency 1.4 - 9 MHz Bands 3 (1: 1.6-3 MHz, 2: 3-5.5 MHz, 3: 5.5-9 MHz) Modulation CW, AM Sensitivity < 1µV (A1, without filter)
< 2µV (A1, with filter)
< 5µV (A3) Valves 2 × ECH42, 2× ECF42
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- Antenna wire (20 m)
- Ground wire (10 m)
- 2 × Isolator
- Ground pin
- Morse key
- Headphones
- Battery power cable
- Mains power cable
- E10 light fitting adapter
- Spare fuses
- Spare valves (tubes)
- Operating instructions
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- ESK-652
- Poste valise Téléfunken
- Amateurgerät
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0064 All Crypto Museum, Netherlands
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Poor quality copy.
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The extra circuit (AM voice modulator) of the ESK-632
is embedded within this manual (page 23-26).
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© Crypto Museum. Created: Friday 30 November 2018. Last changed: Tuesday, 20 August 2024 - 15:56 CET.
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