gls@inuxd.UUCP (Gary Spahn) (03/28/84)
While the 30-50MHz band is usually called a "public service band", the freq-
encies of interest are in the 49MHz 'kiddie walkie-talkie' portion. The new
frequency pairs will open up more channels for the cordless sets, improve
the quality of the link, and get these things out of the navigation/160M
ham bands. The base-to-phone link was around 1750KHz AM and used the house
wiring for an antenna. This accounts for the lousey speech quality. The new
units will be FM on both channels and most probably will have some kind of
security code built-in for access. It must be remembered that this allocation
is only temparary and that ultimately the cordless phones will end up at
900MHz, where the range is inherently limited, but will not suffer the noise
and shielding problems of the present allocation. (If you think these phones
are limited to 700 feet, think again. I've heard conversations on my 6M
receiver that were 300 miles away, when there is a band opening.)
Gary Spahn - KA9MQI
AT&T cp - Indianapolis, IN