Lo40K39d |
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Lorenz 40 Watt Kurzwellensender 39 d |
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This transmitter was manufactured by Lorenz for the Kriegsmarine and was used together with the Lo6k39a receiver. Using up to 40 Watts (see below)of power, this unit was used on battleships, uboats and marine ground stations. It only transmitted Morse Code signals. This is an early example with rare aluminum internal components and the ultra-rare carrying case. This transmitter and power supply were meticulously restored by Vladimir Dvorkin, from whom I purchased it. This transmitter is also capable of a 70 Watt power output based on documents made by US forces examining this transmitter. Their description is written below: 70 W. S. is a short wave transmitter manufactured to Lorenz for use in armored reconnaissance units. The equipment consists of a transmitter and power unit, each separately contained in a carrying case. A light metal casting forms the chassis of each unit and both units are enclosed in sheet metal covers. The subassemblies are easily accessible for inspection. The transmitter is in two stages; it is simple to operate; it is specially suited to mobile installation. The equipment operates while on the move and when stationary. It is probably used at times to supplement the heavy 1-KW transmitter "s" at Army or Corps Headquarters. |
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Specifications |
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FREQUENCY RANGE: |
(MHz) 3.0-16.667 in 3 bands as follows: 3.0-5.2; 5.0-9.3; 9.2-16.667 |
NUMBER OF CRYSTALS: |
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PRESET FREQUENCIES: |
2 |
ANTENNA: |
Rod, mast or single wire 25 to 40 feet long. |
TUNING:(MO OR CRYSTAL) |
MO |
SENSITIVITY: |
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SELECTIVITY: |
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POWER SOURCE: |
Dynamotor U-80A connected to 12 volt battery |
SIMILAR SETS : |
SCR-193 |
POWER OUTPUT:(WATTS) |
70 |
TUBES (TYPE and NUMBER): |
3 x RL12P35, and 3 x RV12P2000 |
USE: |
This set is used by all reconnaissance units in command nets and in air-to-ground control from corps. Battleships and U-boats. |
TYPE OF SIGNAL: |
CW only. |
RANGE: (MILES) |
36 |
TO COMMUNICATE WITH: |
Lower echelons in command nets or with aircraft. |
TO REPLACE IN PART: |
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Transmitter in its rare carry case |
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The front view of the transmitter and its power supply. Both are in perfect operating condition. |
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This is a larger view of the right front panel, showing antenna Ampere and Voltage meters, antenna adjustment selectors, and fine adjustment tuning knob. |
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This is a larger view of the left front panel, showing the frequency range selector and the fine adjustment window. |
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A closer image of the front power supply panel with the ON/OFF switch, fuse casings, and the Morse key socket. |
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Internals of the power supply. This power supply was meticulously restored. The wires had to be replaced with new ones, but the other components are original. With a power supply that delivers over 800 Volts, corners were not cut for safety and proper wiring. |
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The original "Zig-zag" fuses. |
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The power light turned on with the transmitter fully operational. |
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The variometer (antenna tuning coil). |
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Some of the modern wiring, and wooden block for the cable connector to the transmitter. This portion of the power supply was originally in terrible condition and has been completely restored to working order. |
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Another, closer image of the transmitter coupling section. |
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The bottom of the transmitter. |
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A newly acquired item belonging to this transmitter: A calibration chart dated January 5th, 1945. This transmitter was in use throughout the entire war!!! |
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The calibration chart and bracket attached to the transmitter with two screws |
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The transmitter serial number 0137 |
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The calibration chart's serial number 0137 |
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The grounding lug. |
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Fine antenna adjustment. |
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Rough antenna adjustment. |
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Frequency range changes. |
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Transmitter fine frequency adjustment. |
