>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" <n3ox@n3ox.net>
Sent: Friday, December 23, 2011 12:07 PM
To: "topband" <topband@contesting.com>
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
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