Message-ID: <533F9BD29DAB45C49C86D2F1BFF53425@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <CAKvcm2eHxEZXc4=wKP0nnZyvoedaReSHrRGmZB2pUOC_RJ1grw@mail.gmail.com> <1357561166.96226.YahooMailNeo@web133202.mail.ir2.yahoo.com> <1357566320.97293.YahooMailNeo@web133202.mail.ir2.yahoo.com> <1357567457.74036.YahooMailNeo@web133201.mail.ir2.yahoo.com> <CAKvcm2e=6D+3kfUgro7nWYSF2onDXJ0SxP=kJh38kR+N0hEBxg@mail.gmail.com> <1357606435.22427.YahooMailNeo@web133202.mail.ir2.yahoo.com> <E549801DCF6544F2AFAD64D6BCB2EFAC@KlausPC> <1357639491.23767.YahooMailNeo@web133206.mail.ir2.yahoo.com> <90680D974ED44B74BA3A69AD3D1D74B5@KlausPC> <7DF58DAAC3444D83B9955324AACF6132@PcMinto> <5FB5E7A5A752436C942BD62A4A66E239@AGB> <5DB499C4565845A1898DE96BD73FDB73@PcMinto>
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Date: Tue, 8 Jan 2013 21:06:38 -0000
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Subject: Re: LF: Re: 475kHz crystal
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>From the  mfg  web-site , seems  to  be  pc based  support  software ? 
could  not  this be  used to  run the  'dds  demonstration kit'   directly 
?

--------------------------------------------------
From: "Minto Witteveen" <minto.witteveen@gmail.com>
Sent: Tuesday, January 08, 2013 8:42 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: LF: Re: 475kHz crystal

> Hi Graham,
>
> It is possible to use the parallel port of a PC to control the DDS, the 
> DDS has a 3-wire SPI interface. See for instance: 
> http://www.qsl.net/p/pa3ckr//signalgenerator/ . Here you will find 
> (amongst a lot of other info) a VB program to control the DDS 
> (http://www.qsl.net/p/pa3ckr//signalgenerator/prad9850.zip). But be 
> prepared to re-install W95 or possibly DOS because it will not work with 
> newer versions of windows….
>
> Using a PIC is the easiest method I think.  Andy already beat me to it, 
> see his earlier reply to my mail. If you do not want to make a PCB you can 
> even build it using a prototyping breadboard.
>
> Minto pa3bca
>
>
>
>
> --------------------------------------------------------------------------
> Ceterum censeo Carthaginem delendam esse
> -----Original Message----- 
> From: Graham
> Sent: Tuesday, January 08, 2013 21:16
> To: rsgb_lf_group@blacksheep.org
> Subject: Re: LF: Re: 475kHz crystal
>
> Minto
>
> Is it possible to communicate  with the  DDS  from the  PC  for  a  simple
> VFO or  need  the  pic  ?
>
> G.
>
> --------------------------------------------------
> From: "Minto Witteveen" <minto.witteveen@gmail.com>
> Sent: Tuesday, January 08, 2013 6:46 PM
> To: <rsgb_lf_group@blacksheep.org>; <rsgb_lf_group@yahoogroups.co.uk>
> Subject: LF: Re: 475kHz crystal
>
>> Or, as long as you are going to use a PIC anyway, order a AD9850 DDS 
>> module from buyincoins.com. This 0-40MHz DDS costs less than $5 
>> (including shipping). Add a cheap PIC, a $5 2x16 LCD and a rotary encoder 
>> (or use your PC to communicate with the PIC) and you can generate any 
>> frequency you want. And use the PIC to generate Opera, wspr, qrss.
>> My next project. I already have all the components….
>>
>> Minto pa3bca.
>>
>>
>>
>>
>> --------------------------------------------------------------------------
>> Ceterum censeo Carthaginem delendam esse
>> -----Original Message----- 
>> From: Klaus Hirschelmann
>> Sent: Tuesday, January 08, 2013 12:00
>> To: rsgb_lf_group@blacksheep.org
>> Subject: Re: Fw: LF: 475kHz crystal
>>
>> Hi Pete and group
>>
>>>> maybe we can bring http://www.hanssummers.com/ for also offering 
>>>> 630m-Band versions of his QRSS and WSPR kits.
>>
>>> He doesn't seem to have taken MF on board as far as I can see. May one 
>>> of his rigs can be modified I have not checked my self.
>> He does mention the use of Si570 programable xtal. I have one on a board
>> with set frequencies from a PIC and selected by binary from a dil switch.
>> They will not operate as low as 500kc/s so they have to be divided with
>> either a CD4040 or CD4060 or any other logic divider. However it gives
>> stable selectable xtal frequencies. In this case it is probably worth 
>> going
>> the extra mile and make up a DSS as the master oscillator which will give
>> VFO coverage. I think your pays your money and takes you choice as they
>> say....... hee.
>>
>> What i intend to do, is building a relatively simple Stand-Alone WSPR 
>> beacon
>> for 630m-Band. Using a Si570 with additional divider seemed to be quite 
>> an
>> expensive solution. So i did order 7611.2 KHz crystal ( there is a 
>> company
>> manucturing crystals according to given frequency ). By using a HCF4060B
>> oscillator/divider this should give a stable signal around WSPR midden
>> frequency 475.7 KHz. WSPR signal generation is planned according to
>> http://www.knology.net/~gmarcus/WSPR/WWVB_WSPR%20VCXO%20Contoller.pdf 
>> where
>> ( for use in Europe ) i intend to use DCF77 time signals instead of WWVB.
>> Suitable PIC program version is made by PE1NWL and available via
>> http://www.knology.net/~gmarcus/ , while DCF77 receiver module is 
>> obtainable
>> from Conrad Electronics.
>> Because of later signal division by 16, this conception will require a
>> multiplication of crystal FSK deviation by same factor. For WSPR this 
>> should
>> result in values around 23.43 Hz which ( i hope ) will not cause any
>> problem.
>> So far my plans in the moment, but of course it would be much easier, in
>> case somebody would offer a kit already doing all i like.
>> ..
>> Klaus, DJ7OO
>>
>>
>>
>>
>>
>