15 W. S. E. b (15 Watt Sender Empfänger b) 1942 - early war model |
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The 15 W. S. E. b was first built by Telefunken in 1942. It was a modified version of the 15 W. S. E. a. The primary difference between the two, was the capability of the "b" model for operation with the Feldfernschreiber (Hell Schreiber). The power requirements for these device were rather complex as indicated below. The 15 W. S. E. b was a popular device for communications teams at divisional headquarters. Erwin Rommel, commander of the Afrikakorps, is known to have used this transceiver with Hellschreiber to communicate with Berlin. The 15 W. S. E. b consists of a transmitter-receiver with combined operating panel housed in one container, two power supplies, antennas and remote control unit. Frequency adjustment is common to transmitter and receiver which are always on the same frequancy. Receiver fine tuning must always be done by knob "Empfänger-Nachstimmung" (Receiver fine tuning) never by knob "Frequenzeinstellung" (Frequency setting). When tuning the transmitter either in the "Tg" or "Tn" position, the transmitter must be first excited by pressing either the key of the microphone button. When transmission is of long duration, the operating switch should be set to "Senden TG" for CW or to "Senden TN" for voice. This is done to save current by shutting off the receiver. Likewise, during long periods of reception, the transmitter can be shut down by setting the operating switch to "Empfang Tn" or "Empfang Tg". As a security measure, it is possible to tune the antenna without causing it to radiate. |
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Specifications |
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| YEAR INTRODUCED: | 1942 |
FREQUENCY RANGE: |
3.0 to 7.5 MHz in two bands. |
NUMBER OF CRYSTALS: |
None |
PRESET FREQUENCIES: |
None |
ANTENNA: |
The type of antenna used depends upon the tactical employment of the unit. High rod antenna with counterpoise or vehicle roof antenna. |
TUNING: |
(MO OR CRYSTAL) Master Oscillator |
SENSITIVITY: |
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SELECTIVITY: |
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POWER SOURCE: |
Pedal generator type 15a and rectifier with storage battery 2.4 NC 58; 12-volt storage battery in vehicle with converter type 15a and rectifier. |
SIMILAR SETS |
15 W. S. E. a |
POWER OUTPUT: |
Approximately 15 Watts |
TUBES (TYPE and NUMBER): |
Transmitter: 3 x RL 4,8 P15 and 1 x RV 2,4 P 700 Receiver: 8 x RV 2,4 P 700 |
USE: |
This unit is used by the artillery division commander down to the lower units. |
TYPE OF SIGNAL: |
Two-way CW and voice transmission. |
RANGE: (MILES) |
R/T, 20 miles; W/T, 60 miles. Remote operation on voice is possible up to 328.08 feet by using remote control unit "8F". |
TO COMMUNICATE WITH: |
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| TO REPLACE IN PART: | |
TRANSPORTATION: |
Fixed or vehicular |
Other Examples |
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A view of the 15 W. S. E. b front panel. |
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Data plate. This is the earliest version of this transceiver. |
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| The serial number is significant, since they made a schematic modification after serial number 67410, where the suppressor grid of tube #1 (power amplifier) became connected to ground (0) and not the anode (17). Prior to serial number 67410, it was connected to the anode circuit. |
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Reverse with cover off |
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The Telefunken logo found on the early models. |
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Right side of transceiver showing the transmitter tuning block. Note the openings to tune trimmers C13 and C15. These openings are absent on the later models. |
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Note the open ball-bearings around the variable capacitors. This is a feature seen only on the early units. |
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Stamps |
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Stamps |
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Stamps |
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| Installation of the 15W.S.E.b in a vehicle. |
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| 15W.S.E.b in a mobile, non-vehicular configuration. |
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