>From a past experience - be very alert to dissimilar metals and rust. Makes for an almost perfect diode mixer. Chased after this on one of my antennas for months.
Wayne N1WR -------------------------------------------------- From: "Dan Zimmerman N3OX" <[email protected]> Sent: Friday, December 23, 2011 12:07 PM To: "topband" <[email protected]> Subject: Re: Topband: 1820 BCB >> That is a VERY important point Joe. >> >> "getting mixed somehow"- often occurs without fault from either of the >> two >> mixed stations - but as a result of a nearby rectification area (the >> right >> metal hardware (rectifiers) coupled to a antenna of some sort with good >> primary RF energy from the stations) > > I had a bad mix on 1830kHz for a while that would FADE in and out. > Well one night it got really awful and started bursting up to S7 or > S8. I listened to it on AM and heard the familiar pinging of CHU and > I heard the other station identify as a loud local AM BCB station. > > Took me a couple hours of playing with stuff to figure out the loud > local on 1500kHz was mixing with CHU on 3330kHz in a cheap TV rotor (I > assume in the bearings) I had on a lightweight 30 foot mast holding my > 20m Moxon. I strapped around the rotor and the problem was gone. The > "bursting" was just from changes in my "diode" from the antenna > blowing in the wind and moving the rotor housing slightly. > 73, > Dan > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
