[Lowfer] DK7FC WSPR-15

[jrusgrove at comcast.net]

> Perhaps a prelude to a similar thing starting at 6:30 PM on Sunday?

Hey, I'm pulling for the Patriots, too ... now that the Giants and Broncos have fallen by the 
wayside ;~)

Is the loop tuned on the receiver side of the transformer in the shack?

Jay


----- Original Message ----- 
From: "John Andrews" <w1tag at charter.net>
To: "Discussion of the Lowfer (US, European, &amp;UK) and MedFer bands" <lowfer at mailman.qth.net>
Sent: Saturday, January 19, 2013 9:39 AM
Subject: Re: [Lowfer] DK7FC WSPR-15


> Jay,
>
> My receive antenna now is a single-turn loop, 5' in diameter. It runs through a 1:10 step-up 
> transformer, and then is parallel-tuned and run through a preamp. Performance is pretty close to a 
> 10-turn loop of that diameter. Gotta write all this stuff up, someday...
>
> Anyway, it was a rare victory for the Massachusetts team last night. Perhaps a prelude to a 
> similar thing starting at 6:30 PM on Sunday?
>
> JA
>
> On 1/19/2013 9:28 AM, jrusgrove at comcast.net wrote:
>>> Jay may be able to shed some light on this, but I had the unusual
>>> situation last night of producing better SNR reports on DK7FC than
>>> Jay. That's not normal!
>>
>> Have had this happen ocassionally in the past ... with other receiving
>> stations as well. The most likely explanation involves antenna patterns
>> and thunderstorms.
>>
>> Last night, as a good example, I didn't notice anyone complaining about
>> lightning static even though I was experiencing moderate, to at times,
>> above moderate static levels. A look at the lightning map gave a good
>> indication of the likely culprit ... check out the area in yellow circle at
>>
>> http://www.w1vd.com/Tstorm.gif .
>>
>> The antenna in use at W1TAG (box loop ... assuming it's the same old
>> antenna!) with a figure 8 pattern places a fairly wide null in the
>> direction of the yellow circle when aimed at EU. On the other hand, the
>> K9AY in use at W1VD has a cardiod pattern with the response down only
>> several dB in the direction of the yellow circle due to large frontal
>> lobe. A quick comparison of the two patterns at
>>
>> http://www.w1vd.com/Figure8Cardioid.pdf  .
>>
>> I verified this hypothesis (so I guess now it's a theory) a couple years
>> back by installing a large single turn unterminated loop (figure 8
>> pattern) orientated toward EU for comparison to the K9AY. On nights when
>> thunderstorms develop in that area I'm not surprised to take a back seat
>> while using the K9AY.
>>
>> Jay W1VD  WD2XNS  WE2XGR/2
>>
>>
>>
>>
>>
>> ----- Original Message ----- From: "John Andrews" <w1tag at charter.net>
>> To: <k3siw at sbcglobal.net>; "Discussion of the Lowfer (US, European,
>> &amp;UK) and MedFer bands" <lowfer at mailman.qth.net>
>> Sent: Saturday, January 19, 2013 8:18 AM
>> Subject: Re: [Lowfer] DK7FC WSPR-15
>>
>>
>>> Jay may be able to shed some light on this, but I had the unusual
>>> situation last night of producing better SNR reports on DK7FC than
>>> Jay. That's not normal! Consider:
>>>
>>> Time W1TAG vs W1VD
>>> UTC dB
>>> 0000 +1
>>> 0030 0
>>> 0100 No W1VD report (-36 from W1TAG)
>>> 0130 No report from either
>>> 0200 No W1VD report (-34 from W1TAG)
>>> 0230 +4
>>> 0300 +5
>>> 0330 +5
>>> 0400 No W1VD report (-31 from W1TAG)
>>> 0430 +3
>>> 0500 +3
>>> 0530 +4
>>> 0600 +3
>>> 0630 +2
>>> 0700 +2
>>>
>>> Jay and I are 70 miles apart, and while I'm closer to the signal
>>> source, this is a noisy residential neighborhood compared to Jay's
>>> more rural situation.
>>>
>>> John, W1TAG
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