Western Electric Type Number CW-924 Transmitter-Receiver

WE_CW-926 microphone

This CW-924 transmitter-receiver was used during WW I. It is the world’s first push-to-talk radio.

TYPE NO. CW-924
SHORT RANGE RADIO TELEPHONE SET FOR 32 VOLTS D.C. SUPPLY
CONSISTING OF
TRANSMITTER RECEIVER CW 925 TRANS.VACUUM TUBES CW 931
AMPLIFIER CW 926 REC. VACUUM TUBES CW 933
DYNAMOTOR SYSTEM CW 927 TRANSMITTER ARM CW 967
SWITCHBOARD CW 928 FILTER CW 968
LOUD SPEAKING TELEPHONE CW 929 ANTENNA SWITCH CW 969
HAND SET CW 930
RANGE 250 M TO 450 M
SERIAL No. 158 REQ. No. NSA 1216-18 CONT. No. DATE 1918

 

This CW-925 transmitter-receiver was used on Eagle and small patrol boats during WW-I.

It is the world’s first push-to-talk radio.

Inside view of the CW-925 transmitter-receiver.
Click on image to see a larger view. CW-925 transmitter-receiver Schematic. Click on image to see a larger view.
CW-926 RF Amplifier.
Inside view of the CW-926 RF amplifier.
Click on image to see a la CW-926 RF Amplifier Schematic. Click on image to see a larger view.
CW-968 Filter.
CW-929 Loud Speaking Telephone. The museum does not have one of these.
The CW-930 microphone with a push-to-talk- button.