Skip to main content

Posts

Showing posts with the label ham radio-AFTER the zombie apocalypse

ham radio - AFTER the zombie apocalypse, The prepper HF antenna that's a...

If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=QWfqZOVqzeA. This is post #1235. Although the telephone wire leading to your home may make an excellent antenna, please be careful how you use this "last resort" antenna. Kevin Loughin (KB9RLW) does a good job of explaining how to adapt your telephone line for radio reception, and warns about the safety precautions involved in using this antenna.  Of particular concern is the 48 volts DC present on an active line and the 90 volts DC present when a call comes in.  That's sufficient voltage to destroy a small transistor radio.  To avoid this issue,  just add a capacitor in series to eliminate the line voltage and a high pass filter to suppress the ringtones. Hopefully, we won't have to resort to this method of communications. But, in this violent century, one never knows when such antenna solutions may be necessary. For the latest Amateur R