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Re: LF: Almost

To: <[email protected]>
Subject: Re: LF: Almost
From: "Michael Sapp" <[email protected]>
Date: Sat, 30 May 2015 14:33:38 -0400
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Markus:  I do not think the QRM signals are spurious. I have built the W1VD preselector for 475~500 kHz range and the offending signals are still present when the preselector is used.  Same with the FZ-02 filter.  There are some commercial and retail shops to my NE about 300~400 meters away, possible that is the source.  However, the offending QRM signals are not consistent in frequency or strength from one day to the next.  QRM signals are not very strong, but strong enough to interfere with a -27 to -30 SNR desired signal.  
  I use a pair of crossed EWE antennas to have four-way selectable cardio patterns for NE, SW, SE, and NW directional reception. If I switch to the NW direction, the QRM signals go away, but then directivity to DK7FC would be about 4~5dB down.  To the SW and SE directions some QRM sources disappear, and other QRM sources appear.  I may try some phase steering between the two EWE antennas. It is an ongoing learning process. Random chance could always prevail, so I continue to listen, tinker, and occasionally even learn something ~:). 73,
Mike wa3tts
PS: I have received several  F5WK wspr2 captures on 630m this last December....
----- Original Message ----- a
Sent: Saturday, May 30, 2015 6:20 AM
Subject: Re: LF: Almost

Looks like Stefan ran into a Loran line... but wait, Loran is no longer there in North America, and anyway we're on MF not LF. Mike any idea what is causing those spurs?
73, Markus (DF6NM)

Sent: Saturday, May 30, 2015 4:41 AM
Subject: LF: Almost

Stefan: Close, but no cigar..... local QRM.....
73 Mike wa3tts
----- Original Message -----
From: DK7FC
Sent: Friday, May 29, 2015 6:03 PM
Subject: LF: Worse than false decodes...

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