100 Watt Sender

L.S. 100/108 (Langwellen Sender 100/108)

Transmitter adapted for use in mobile command post. Circuit MOPA (master oscillator - power amplifier). Inductively tuned variometer coils; capacity type wave change system. Build on 3 assemblies - RF, LF and antenna tuning - fitted together by interconnecting lugs and sockets. Compartments of die-cast aluminum. Colors used liberally on dials and switches to indicate different bands. This set was originally used with the Spes. 445Bs receiver (obsolete); now used with the Torn.E.b. Manufactured by Lorenz. It may be known also as Type L.S. 100/108 (24v-108) in Lorenz commercial catalog and was developed before the war so that it could be quickly converted.
 
Specifications
 
FREQUENCY RANGE:
0.2-1.2 MHz in five bands.

NUMBER OF CRYSTALS:
None

PRESET FREQUENCIES:
None

ANTENNA:
One 10-meter mast with 4-spoke umbrella (medium frequency) or one 6-meter sectional mast with 3-spoke umbrella (higher frequency). Roof masts were sometimes used.

TUNING:
(MO OR CRYSTAL) Mo. - self excited.

SENSITIVITY:

SELECTIVITY:

POWER SOURCE:
Mobile dynamotor U-100 or U-100a. Consumption 12 Volts dc at 30.8 Amps, output 1000 Volts at 240 mA. (speed 4000 RPM). Fixed gasoline-driven AC generator (consumption 12 Volts at 7.3 Ams, 1000 Volts at 240-300 mA).

SIMILAR SETS
SCR-197

POWER OUTPUT:
100 Watts. (can be switched to provide 1/10 the output)

TUBES (TYPE and NUMBER):

Two RS-237 triodes (M.O. and P.A.) and one RS-241 (speech amplifier); Both are directly heated Telefunken tubes requiring 12 volts.

USE:
Administrative control set for large areas. It can be used in vehicles or as a fixed station. Division command set use possible.

TYPE OF SIGNAL:
CW and Voice; Local and remote keying; Facsimile transmission.

RANGE: (MILES)
CW 25-200; voice 10-70; The lower ranges are "on the mode"

TO COMMUNICATE WITH:
Other sets within the same frequency range. Torn.E.b - all-purpose receiver -- and Lw.E.a are usually used as receivers. Type 80.W.S.c can be netted with it.

TO REPLACE IN PART:  

 
TRANSPORTATION:
Armored command cars, half-tracks or communications trucks.

 
Front view of the transmitter. This one was built in 1940.

 

 
Here is the antenna output connector (sitting on a massive ceramic isolator), and the antenna ammeter (displays up to 4 Amps).

 

 
The large and complex antenna tuning control. It is composed of three integrated controls. The large outer knob is the antenna frequency matching control, the middle knob is the antenna power level, and the small knob is the fine-tuning control. The number in the window changes along with its color to match the frequency control setting on the left side of the transmitter.

 

 
Another view of the antenna control system.

 

 
The "on/off" switch along with the operation mode control. "Receive / Off / Morse Code / Voice". The connector on the right is for the Antenna counter-weight. Also the manufacturer's data and year.

 

 
The Volt meter and the filament power adjustment knob. The voltmeter can go up to 1500 Volts for anode and 15 Volts for filament voltages.

 

 
The test relay box, microphone connector, Morse key connector, 1000 V power input, 12 V power input, and a common ground connector for the receiver.

 

 
The frequency range selector switch.

 

 
The 100WS with the housing removed.

 

 
The huge antenna tuning coil. Many internal components are made from bakelite, to reduce internal capacitance and to lighten the weight of the transmitter. Notice the size of the antenna power feed tubes.

 

 
Top view of the 100WS showing the tube sockets.

 

 
Frequency adjustment variable capacitors with manufacturer's data on each one.

 

 
Another photo of these capacitors.

 

 
The left side of the 100WS.

 

 
The Lorenz logo on an inside wall.

 

 
A 100WS being used around 1935.

 

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