Brom Philips BX 290 U (Techniek Radio/TV)

door Maurice , Dordrecht, 28.12.2008, 11:16 (5621 dagen geleden) @ huub.jak

Huub,

Zoek jij nu maar eens op AM-Stereo.
Hier in deze setting uitstekend mogelijk met 2 identieke radio's.

http://www.wbdhradio.com/index.html

RCA developed an early AM Stereo system, and field tested it in 1959 on WNBC's 50 kW RCA-50B transmitter in New York. WNBC's RCA-50B transmitter, whose design dates back to 1930, is pictured in the 1940 photo shown above, when the station call letters were WEAF. The RCA AM stereo system transmits the L+R stereo sum signal as normal AM, and transmits the L-R stereo difference signal as FM on the main AM carrier. A deviation of about 1,000 Hz is used for the FM, and the L-R audio signal is pre-emphasized using a "modified" 100 usec. time constant.