From: DL4YHF@aol.com
Message-ID: <49.15893128.2950ed60@aol.com>
Date: Tue, 18 Dec 2001 14:05:04 EST
Subject: LF: Re: long haul QSO's
To: rsgb_lf_group@blacksheep.org
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<HTML><FONT FACE=arial,helvetica><FONT  SIZE=2>Hi group,
<BR>
<BR>How about using a simple AD9832 DDS programmed directly via serial interface from the PC, and -if necessary- a PIC to convert standard RS232 frames into the DDS's format ?
<BR>
<BR>Johan (SM6LKM) has a nice and simple DDS board which looks perfect for this job, and -much to my surprise- the AD9832 is easily available in this country, about 10 Euro's per chip. Unfortunately, the AD9832 is only available in SMD TSSOP(!) case which is not very "veroboard-friendly".
<BR>A first attempt to make a home-etched PCB failed because the copper strips are too thin (and my printer too bad). Making a few cuts into the copper with a knife may be a better solution, I will try this in the short xmas vacation.
<BR>
<BR>A PC program (in Basic, Pascal, "C", under DOS, Windoze or whatever) could be easily made because re-programming the DDS would not be time-critical as I see it (or are we talking about a very "coherent" mode ?)
<BR>
<BR>Looking forward to meet you on air soon. 
<BR>
<BR>
<BR>GL, and merry Christmas
<BR>
<BR> &nbsp;Wolf &nbsp;DL4YHF.
<BR>
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