[Lowfer] Bogus WSPR decodes

[jrusgrove at comcast.net]

Paul

I'm using homebrew phasing exciters for 137 and 500 kHz. With sorted 1% resistors, matched 
capacitors and four section all pass filters on each leg I see ~ -50 dB over the 300 - 3000 Hz 
frequency range and ~ -60 dB at 600 - 1000 Hz.

Jay


----- Original Message ----- 
From: "Paul Daulton" <k5wms at centurytel.net>
To: "Discussion of the Lowfer (US, European, &amp;UK) and MedFer bands" <lowfer at mailman.qth.net>
Sent: Sunday, March 07, 2010 12:13 PM
Subject: Re: [Lowfer] Bogus WSPR decodes


> John and Jay thanks for the reply. I thought it was somekind of miracle, but
> when nothing came on the rest of the night and the station was not on the
> list on WSPR I became a little doubtful. Its reassuring to know I am not
> looseing it.
>
> I will try 600 meters and see what happens. 160 seems to do well.
>
> Off the topic some what but related. My experience with phasing ssb was back
> in the '60s. I had a Central Electronis 10b and later a Ht37. I picked up a
> home brew ssb jr and a Cheap and Easy SSB( converted arc 5). With limited
> equipment the homebrew stuff was difficult to align. Current digital
> technology makes rf phasing easy to accomplish, but home brewing an audio
> phase shift  over a wide range a chore. But with WSPR, BPSK, WOLF and other
> modes phase shift at a single freq on audio would be easy.Would it be a
> practical project to make a phasing exciter for single tone or a narrow
> audio bandpass? I know simple designs exist for simple SDR exciters but I am
> thinking of  a stand alone unit? What do you think?
>
> Paul
> ----- 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: Sunday, March 07, 2010 8:56 AM
> Subject: Re: [Lowfer] Bogus WSPR decodes
>
>
>> Paul, J.B.,
>>
>> On 3/7/2010 9:44 AM, jrusgrove at comcast.net wrote:
>>> That's a bogus decode. You can count the number of active stations on 137
>>> kHz on your fingers and
>>> toes and have some left over...and that's not one of them. Another tip
>>> off is the grid square - it's
>>> somewhere in the vicinity of Australia.
>>
>> I'm getting tons of bogus decodes on 137 trying to copy Dex's signal. My
>> screen is a mess of AC-related squigglies and Canadian East Loran lines.
>> But as Jay points out, an infinite number of monkeys can type out a lot
>> of real callsigns, but they rarely assign them a valid grid square!
>>
>> John A.
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