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| 13939 transmitter. |
 |
| 13939 schematic It looks like the RF signal is being modulated with 60 Hz from a secondary winding on the transformer to generate an MCW signal. . |
| Images courtesy Scientific Experimenter Limited catalogue, February 1922 |
13939 MCW Transmitter
SPECIFICATIONS
Frequency range: 200 meter band (1500 KHz)
Type: MCW transmitter
Power output: The MT3 tube had a plate dissipation of 40 watts so the RF outoput wouod have been kess than this amount.
Vintage: 1922
Enclosure: Mahogany case with hard rubber front panelCosts:
Transmitter with tube $150
MT3 rube only $50
#406 transmitting key $5
Silicon bronze aerial wire - 84 cents per 100 feet
Electrose corrugated insulators - 55 cents eachComments. This transmitter was sold to both the commercial and amateur radio marketplace.
|
| 13939 transmitter. |
|
| 13939 schematic It looks like the RF signal is being modulated with 60 Hz from a secondary winding on the transformer to generate an MCW signal. . |
| Images courtesy Scientific Experimenter Limited catalogue, February 1922 |
Contributors and Credits:
1) SEL Catalogue Feb 1922
Mar 23/18