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Date: Tue, 8 Jan 2013 13:11:21 +0000 (GMT)
From: M0FMT <m0fmt@yahoo.co.uk>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
In-Reply-To: <90680D974ED44B74BA3A69AD3D1D74B5@KlausPC>
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Subject: Re: Fw: LF: 475kHz crystal
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Hi Again Klaus and group=0A=A0=0AJust got in from a nice ride (burn) on my =
motorbike beautiful day here.=0A=A0=0AYes agreed about the=A0kits likewise =
I was hoping Softrock would do a 136/500 trx they almost got there but thei=
r Beta tester let them down otherwise I would be building right now.=A0=0A=
=A0=0AJohan Bodin SM6LKM has done a keyer pic based for wspr TX and=A0I bui=
lt it several years ago. Same principal you described the four shifts had t=
o be set independently to suit the xtal division like=A0you 16 times. I=A0s=
till have it and on close circuit testing it worked OK then I damaged it do=
n't know how so its in the box of "=A0I'll fix it some time projects"=A0!=
=A0=A0You are right about the Si570 costing, it builds up for a simple stan=
d alone project as does the DSS so a cheap xtal takes a lot of beating so l=
ong as the band allocation is stable as it probably is now. For 500=A0I hav=
e quite a few old 2m x18 xtals from the 1960s (never throw anything away...=
 hee) which divided on to 501/504 but not so lucky this time so have to spe=
nd money now.......:-(=0A=A0=0AWe need some cleaver guys to generate some i=
nteresting MF kits?=0A=A0=0AThanks for the info and please report back ther=
e are people who still build their own and like to hear about others who do=
.=0A=0A73 es GL Pete M0FMT IO91UX=0A=0A=0A>________________________________=
=0A> From: Klaus Hirschelmann <k.hirschelmann@kabelmail.de>=0A>To: rsgb_lf_=
group@blacksheep.org =0A>Sent: Tuesday, 8 January 2013, 11:00=0A>Subject: R=
e: Fw: LF: 475kHz crystal=0A>  =0A>Hi Pete and group=0A>=0A>>> maybe we can=
 bring http://www.hanssummers.com/ for also offering 630m-Band versions of =
his QRSS and WSPR kits.=0A>=0A>> 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.=0A>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 di=
l switch. They will not operate as low as 500kc/s so they have to be divide=
d with either a CD4040 or CD4060 or any other logic divider. However it giv=
es stable selectable xtal frequencies. In this case it is probably worth go=
ing the extra mile and make up a DSS as the master oscillator which will gi=
ve VFO coverage. I think your pays your money and takes you choice as they =
say....... hee.=0A>=0A>What i intend to do, is building a relatively simple=
 Stand-Alone WSPR beacon for 630m-Band. Using a Si570 with additional divid=
er seemed to be quite an expensive solution. So i did order 7611.2 KHz crys=
tal ( 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 a=
ccording to http://www.knology.net/~gmarcus/WSPR/WWVB_WSPR%20VCXO%20Contoll=
er.pdf=A0 where ( for use in Europe ) i intend to use DCF77 time signals in=
stead of WWVB. Suitable PIC program version is made by PE1NWL and available=
 via http://www.knology.net/~gmarcus/ , while DCF77 receiver module is obta=
inable from Conrad Electronics.=0A>Because of later signal division by 16, =
this conception will require a multiplication of crystal FSK deviation by s=
ame factor. For WSPR this should result in values around 23.43 Hz which ( i=
 hope ) will not cause any problem.=0A>So far my plans in the moment, but o=
f course it would be much easier, in case somebody would offer a kit alread=
y doing all i like.=0A>..=0A>Klaus, DJ7OO=0A>=0A>=0A>=0A>=0A>=0A>=0A>=0A>  =
 
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:ar=
ial, helvetica, sans-serif;font-size:14pt"><div><span>Hi Again Klaus and gr=
oup</span></div><div><span></span>&nbsp;</div><div><span>Just got in from a=
 nice ride (burn) on my motorbike beautiful day here.</span></div><div><spa=
n></span>&nbsp;</div><div><span>Yes agreed about the&nbsp;kits likewise I w=
as hoping Softrock would do a 136/500 trx they almost got there but their B=
eta tester let them down otherwise I would be building right now.&nbsp;</sp=
an></div><div><span></span>&nbsp;</div><div><span>Johan Bodin SM6LKM has do=
ne a keyer pic based for wspr TX and&nbsp;I built it several years ago. Sam=
e principal you described the four shifts had to be set independently to su=
it the xtal division like&nbsp;you 16 times. I&nbsp;still have it and on cl=
ose circuit testing it worked OK then I damaged it don't know how so its in=
 the box of "&nbsp;I'll fix it some time
 projects"&nbsp;!&nbsp;&nbsp;You are right about the Si570 costing, it buil=
ds up for a simple stand alone project as does the DSS so a cheap xtal take=
s a lot of beating so long as the band allocation is stable as it probably =
is now. For 500&nbsp;I have quite a few old 2m x18 xtals from the 1960s (ne=
ver throw anything away... hee) which divided on to 501/504 but not so luck=
y this time so have to spend money now.......:-(</span></div><div><span></s=
pan>&nbsp;</div><div><span>We need some cleaver guys to generate some inter=
esting MF kits?</span></div><div><span></span>&nbsp;</div><div><span>Thanks=
 for the info and please report back there are people who still build their=
 own and like to hear about others who do.</span><br></div><div>73 es GL Pe=
te M0FMT IO91UX<br> <blockquote style=3D"padding-left: 5px; margin-top: 5px=
; margin-left: 5px; border-left-color: rgb(16, 16, 255); border-left-width:=
 2px; border-left-style: solid;">  <div style=3D"font-family: arial,
 helvetica, sans-serif; font-size: 14pt;"> <div style=3D"font-family: times=
 new roman, new york, times, serif; font-size: 12pt;"> <div dir=3D"ltr"> <f=
ont size=3D"2" face=3D"Arial"> <div style=3D"margin: 5px 0px; padding: 0px;=
 border: 1px solid rgb(204, 204, 204); height: 0px; line-height: 0; font-si=
ze: 0px;" class=3D"hr" contentEditable=3D"false" readonly=3D"true"></div>  =
<b><span style=3D"font-weight: bold;">From:</span></b> Klaus Hirschelmann &=
lt;k.hirschelmann@kabelmail.de&gt;<br> <b><span style=3D"font-weight: bold;=
">To:</span></b> rsgb_lf_group@blacksheep.org <br> <b><span style=3D"font-w=
eight: bold;">Sent:</span></b> Tuesday, 8 January 2013, 11:00<br> <b><span =
style=3D"font-weight: bold;">Subject:</span></b> Re: Fw: LF: 475kHz crystal=
<br> </font> </div> <br>Hi Pete and group<br><br>&gt;&gt; maybe we can brin=
g <a href=3D"http://www.hanssummers.com/" target=3D"_blank">http://www.hans=
summers.com/</a> for also offering 630m-Band versions of his QRSS and WSPR =
kits.<br><br>&gt; 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.<br>He does mention the us=
e of Si570 programable xtal. I have one on a board with set frequencies fro=
m 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 frequenci=
es. In this case it is probably worth going the extra mile and make up a DS=
S as the master oscillator which will give VFO coverage. I think your pays =
your money and takes you choice as they say....... hee.<br><br>What i inten=
d to do, is building a relatively simple Stand-Alone WSPR beacon for 630m-B=
and. 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 manucturin=
g crystals according to given frequency ). By using a HCF4060B
 oscillator/divider this should give a stable signal around WSPR midden fre=
quency 475.7 KHz. WSPR signal generation is planned according to <a href=3D=
"http://www.knology.net/~gmarcus/WSPR/WWVB_WSPR%20VCXO%20Contoller.pdf" tar=
get=3D"_blank">http://www.knology.net/~gmarcus/WSPR/WWVB_WSPR%20VCXO%20Cont=
oller.pdf</a>&nbsp; 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 <a href=3D"http://www.knology.net/~gmarcus/" target=3D"_blan=
k">http://www.knology.net/~gmarcus/</a> , while DCF77 receiver module is ob=
tainable from Conrad Electronics.<br>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.<br>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.<br>..<br>Klaus, DJ7OO<br><br><br><br><br><br><br=
><br> </div> </div> </blockquote>  </div></div></body></html>
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