Message-ID: <254A4F17D55E481F9D7AB252D287B3A3@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <805528.86512.qm@web28101.mail.ukl.yahoo.com> <20100103181609.ivn5yo6dmosk444k@webmail6.kuleuven.be>
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Date: Sun, 3 Jan 2010 18:24:42 -0000
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Subject: Re: LF: Anti Social ssb
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Rik,

''''so writing the appropriate software shouldn'd be to   hard.''''

Everyone can write  software .. but not everyone can press  the  keys in the 
right  order !

Talking of 'key's'   its  starting to  look like Mal has been  right  for a 
long time .. the  effort required
to  generate anything  more than a  on/off carrier on 500  is taking  it 
through the  'fun' barrier for
most operators .. and  the  stability requirements of the  likes of wspr 
leaves one open to a  little
technical banter .. what other  mode has 'banana' as one of the accepted 
report's (at least please
send with  other foot  takes some time to  key)

ATB 2010 - G ..

--------------------------------------------------
From: "Rik Strobbe" <Rik.Strobbe@fys.kuleuven.be>
Sent: Sunday, January 03, 2010 5:16 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: Anti Social ssb

>
> Pete,
>
> There is no need for linear amplification with WSPR, so things can be 
> kept simple.
> Another way to get a 500kHz WSPR signal is to generate WSPR with the 
> tones 14.6Hz separated at 5MHz and then divide by 10.
> As Andy states the WSPR protocol is public (and pretty  straightforward), 
> so writing the appropriate software shouldn'd be to  hard.
>
> 73, Rik  ON7YD - OR7T
>
> Quoting M0FMT <m0fmt@yahoo.co.uk>:
>
>> Probably simpler to to make up a transverter - mixer with a xtal 
>> controlled oscillator and a few stages of linear amplification   driving 
>> the mixer with an SSB rig. The whole thing about WSPR is the  Low power 
>> aspect so no QRO linears required if you play the game.   Then use the 
>> readily available Software that can be down loaded for   free.... no 
>> brain surgery required.
>>
>> 73 es GL petefmt
>>
>> --- On Sun, 3/1/10, Andy Talbot <andy.g4jnt@googlemail.com> wrote:
>>
>> From: Andy Talbot <andy.g4jnt@googlemail.com>
>> Subject: Re: LF: Anti Social ssb
>> To: rsgb_lf_group@blacksheep.org
>> Date: Sunday, 3 January, 2010, 15:59
>>
>> There is a way...
>>
>> If you can arrange an oscillator so that it can be pulled onto the
>> four WSPR tone frequencies (separated by 1.46Hz ) by two logic lines.
>> This could be as simple as two resistors, one twice the value of the
>> other, giving a 2-bit D/A converter, controlling a varicap on the
>> oscillator.
>>
>> Then a PIC keyer can generate the logic level drive.
>> See    www.g4jnt.com/WSPRBCNS.ZIP   for details of generating teh WSPR
>> message and the PIC code
>>
>> The design in there uses a GPS receiver to get accurate timing, but
>> with some trivial PIC code changes it could be made to work in a
>> standalone manually trigerred mode.
>>
>> Perhaps there's a demand here...
>>
>> WSPR encoding on the fly is easy enough in a PC
>> http://www.g4jnt.com/wspr_coding_process.pdf
>> A prog could be written to output the two-bit data via a USB/Serial
>> port and PIC based dongle...
>>
>> Andy
>> www.g4jnt.com
>>
>>
>>
>> Andy
>> www.g4jnt.com
>>
>> This email has been scanned for damaging side-effects by the health
>> and safety police, is guaranteed to contain no substances hazardous to
>> health, but may contribute to dissolving the nether and polar regions
>>
>>
>>
>> 2010/1/3 Graham 
>> <g8fzk@g8fzk.fsnet.co.uk<http://uk.mc281.mail.yahoo.com/mc/compose?to=g8fzk@g8fzk.fsnet.co.uk>>:
>>> Roger
>>>
>>> '''  More people should use WSPR - '''
>>>
>>> That's not as  easy as  it  sounds , wspr  needs  a  liner audio to  rf
>>> carrier frequency  conversion,  ...fine  if you have a  conventional
>>> transverter , mf exciter or ham set that works down to  500/137 ...No 
>>> good
>>> if you  have dividing logic in the amplifier  drive train , vfo 
>>> controlled
>>> or PIC based without the  'ability'  to  run a wspr  generating  code 
>>> set ..
>>> Its a  good  point worth making though ...
>>>
>>> G..
>>> From: Roger Lapthorn
>>> Sent: Saturday, January 02, 2010 10:20 PM
>>> To: 
>>> rsgb_lf_group@blacksheep.org<http://uk.mc281.mail.yahoo.com/mc/compose?to=rsgb_lf_group@blacksheep.org>
>>> Subject: Re: LF: Anti Social ssb
>>> Mal,
>>>
>>> Some suggestions:
>>>
>>> More people should use WSPR - lots of stations (more than 100 at a time
>>> based on 10MHz usage) are able to operate together within just a 200Hz 
>>> slice
>>> of the band allowing very useful data on propagation and station
>>> performance/changes to be determined.  This would leave plenty of room
>>> elsewhere in the band for CW and other narrowband conversational modes.
>>> Occasional testing with SSB, for those allowed to use it (not UK), is of
>>> interest to me as a listener, but I agree that it's not a good idea to 
>>> use
>>> this mode when the band is open for really long-distance DX if 
>>> interference
>>> to weak signals is likely.
>>> You should try a New Year resolution: "I will be more tolerant and moan
>>> less".
>>>
>>> 73s and a happy New Year to all on this reflector
>>>
>>> Roger G3XBM
>>>
>>>
>>>
>>>
>>> 2010/1/2 mal hamilton 
>>> <g3kevmal@talktalk.net<http://uk.mc281.mail.yahoo.com/mc/compose?to=g3kevmal@talktalk.net>>
>>>>
>>>> I am afraid we have a SSB beacon on 508 kcs spreading over 3 kcs wide 
>>>> and
>>>> S9 plus with me. Beacon SM6BHZ is causing QRM to those of us trying to
>>>> listen and work the East Coast USA stations. I cannot understand why a
>>>> station is licensed to work SSB in such a narrow band allocation.
>>>> The 500 kcs band is a Shambles swamped by beacons.
>>>> Does anyone else have an opinion?
>>>> G3KEV
>>>>
>>>
>>>
>>> --
>>> -------------------------------------------------------------
>>> http://g3xbm-qrp.blogspot.com/
>>> http://www.g3xbm.co.uk<http://www.g3xbm.co.uk/>
>>> G3XBM    GQRP 1678      ISWL G11088
>>>
>>>
>>>
>>
>>
>>
>>
>
>
>
>