TRANSMITTERS & TRANSCEIVERS

Type SPA

DATE OF DESIGN

N/K or N/A

FREQUENCY RANGE

N/K or N/A

POWER SUPPLIES

100 V or 250 V 48 to 61.5 Hz AC

RANGE IN MILES.

N/K or N/A

TYPE OF SET (VALVES USED)

N/K or N/A

WAVEFORM

N/K or N/A

ASSOCIATED WAVEMETER.

N/K or N/A

METHOD OF PRODUCING OSCILLATIONS

N/K or N/A

WHERE USED/FITTED

The outfit provides coded selective calling and responding facilities between a possible 1000 station addresses on a radio or line network. A station may also make a collective call to all other stations.

FURTHER READING

PHOTOS, SCHEMATICS, DOCUMENTS

Details of Type SPA

NOTES.

N/K or N/A