You can be heard on a cordless phone WARNING.
Yes, it’s done whether we like it or not, whether it’s legal or not, whether it’s moral or not. If you don’t want to be heard by a scanner then use the wire line. Please remember, a cordless phone is nothing more than a transceiver which broadcasts your voice, and the person you’re talking to, on radio frequencies which float through the air. And they float a very good distance.
About Cordless Phone Monitoring Antenna
(original site: http://www.telstarone.com/cs_cpma.htm)
If you want your scanner to be able to pull in those cordless telephone calls and baby monitors, then toss the antenna that came with the scanner and replace it with this one! Rubber ducks and whip antennas are just to small to be efficient at 46-49 MHz where most cordless phones operate. This powerful portable halfwave antenna is resonant in the cordless phone band and has the surface area to pull in signals. The National Scanning Report found that “cordless phone conversations unheard using the whip came booming in.” It’s designed to give the best performance possible for an indoor antenna. In use, it’s stretched out to the full 15 ft. length, then coiled up and put away when done.
Gain is approximately 2 dBi (the gain of a stock antenna at 46 is about minus l6 dBi). Standard BNC connector.
Includes frequency chart for cordless phones and baby monitors.
Feedline: 8 ft. RG8X.
Material: 300 Ohm ladder.
Weight: 1 Ib.
Warning: eavesdropping on telephone conversations of others is generally illegal consult with an attorney before engaging in any such activity.