SEG-2T |
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Send/Empfäng Gerät - 2T |
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SEG2T is a UHF transportable, tripod-mounted, single-channel, beamed equipment with provision for voice and for local and remote control. The transceiver, batteries, and accessories are carried in cases for standard German construction and the tripod in a canvas bag. The folding antenna is plugged into a four-point socket at the back of the transceiver case. Antenna, headphones, microphone handset key, remote control cable, spare tubes and induced current ammeter are carried in the accessories bag. An acorn tube acts as a plate-modulated, parallel rod oscillator. The detector is a conventional, superregenerative, acorn oscillator. The two circuits are identical except for the grid leak of 5 kilohms in the transmission circuit. A triode operating as a Hartley oscillator on 550 KHz, coupled inductively to the detector, provides external quench. Quench voltage is preset by means of a 200-ohm potentiometer across the coupling coil. Superregeneration is controlled by a 10 kilohm variable resistance in the feed to both oscillators. It is believed that special troops use this equipment in air-raid net or tactical net at Corps. Camouflaging this tripod-mounted gear and the necessity for an optical transmission path, make it vulnerable to "spotting". Approximately 1,000 SEG-2T "Elster" sets were manufactured (source Fritz Trenkle) |
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Specifications |
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FREQUENCY RANGE: |
(MHz) 500-600 |
NUMBER OF CRYSTALS: |
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PRESET FREQUENCIES: |
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ANTENNA: |
A voltage-fed, double-diamond, Chireix-Mesny array with quarter-wave space reflector is used to obtain a forward looking beam approximately 40 degree wide with provision for vertical or horizontal polarization. It can be folded for stowing. |
TUNING:(MO OR CRYSTAL) |
Master Oscillator |
SENSITIVITY: |
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SELECTIVITY: |
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POWER SOURCE: |
One 2-volt storage battery for heaters, filaments, relays and microphone; two 90-volt dry batteries in series. |
SIMILAR SETS : |
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POWER OUTPUT:(WATTS) |
Believed to be rated 0.04-0.06 watts. Plate current 11 mA with 124 volts rising to 13 mA when modulated. |
TUBES (TYPE and NUMBER): |
Two DS310, two RL2T2, and one RV2P800 |
USE: |
This set is intended for short-range, quasi-optical, point-to-point communication. Communication is highly directional. Used in early-warning air-raid systems, and to pass some tactical traffic. |
TYPE OF SIGNAL: |
Tone and voice |
RANGE: (MILES) |
Limited - quasi - seriously affected by intervening objects. In tests, line of sight communications produced signals up to 8 miles - the maximum distance covered by the tests. At this distance, horizontal was superior to vertical polarization. |
TO COMMUNICATE WITH: |
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TO REPLACE IN PART: |
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The front view of the SEG2T. |
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The LORENZ manufacturer's data on top of the case. |
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Back of the case with the porcellain-isolated socket for the Chireix-Mesny antenna. |
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The voltmeter and the ammeter. |
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The On/Off switch and the communications mode selector. |
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The power connector. |
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The communications interface device connectors. |
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Cover off.......Bottom view of the SEG2T |
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View of the SEG2T from the top. |
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Right side. This unit was manufactured in France, judging by the "LMT" stamps on the capacitors. |
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Left side. LMT stands for "Le Materiel Telephonique" |
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View from the rear |
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| Inside the case - the antenna contacts are on the back wall, while on the top and bottom are grounding contacts. |
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| Better view of the grounding contacts. |
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| SEG-2T being set up on top of a radio wagon. |