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TYPE NO. CW-924
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SHORT RANGE RADIO TELEPHONE SET FOR 32 VOLTS D.C. SUPPLY
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CONSISTING OF
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| 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 | ||
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RANGE 250 M TO 450 M
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SERIAL No. 158 REQ. No. NSA 1216-18 CONT. No. DATE 1918
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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. |
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Inside view of the CW-925 transmitter-receiver. | |
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CW-925 transmitter-receiver Schematic. Click on image to see a larger view. | |
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CW-926 RF Amplifier. | |
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Inside view of the CW-926 RF amplifier. | |
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CW-926 RF Amplifier Schematic. Click on image to see a larger view. | |
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CW-968 Filter. | |
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CW-929 Loud Speaking Telephone. The museum does not have one of these. | |
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The CW-930 microphone with a push-to-talk- button. | |