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<div class="moz-cite-prefix">Nevím, asi tomu nerozumím. Ale v
datasheetu píšou šumové číslo 12 dB. To aby ten LNA na vstupu měl
zesílení aspoň 20 dB? Nebude pak nejchoulostivější na přebuzení
ten vstupní zesilovač?<br>
Anděl<br>
<br>
Dne 27.4.2017 v 10:54 <a class="moz-txt-link-abbreviated" href="mailto:Cihak@dkv.cd.cz">Cihak@dkv.cd.cz</a> napsal(a):<br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Nedávno
jsem postavil RX pro 144MHz inspirovaný např. tímto: <a
moz-do-not-send="true"
href="https://svetelektro.com/clanky/uhf-sdr-radio-481.html">https://svetelektro.com/clanky/uhf-sdr-radio-481.html</a>
. Jen to je doplněné o filtry pro 144MHz a na vstupu je
PGA103+. Dokumentaci mohu dodat pokud by byl zájem. Ten
LT5517 je perfektní – pár součástek okolo a velmi slušné
rádio je na světě. Celé rádio vypadá na měřákách dost dobře.
K praktickému využití ale nakonec nedošlo…<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
Martin - OK1UGA.<o:p></o:p></span></p>
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style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
Hw-list [<a class="moz-txt-link-freetext" href="mailto:hw-list-bounces@list.hw.cz">mailto:hw-list-bounces@list.hw.cz</a>] <b>On
Behalf Of </b>Petr Zapadlo<br>
<b>Sent:</b> Thursday, April 27, 2017 8:13 AM<br>
<b>To:</b> HW-news<br>
<b>Subject:</b> Re: maly prijimac 2m<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p>Zdravím, moc hezké moduly - neznal jsem.<o:p></o:p></p>
<p>Dovolím si to trochu rozšířit - nevíte o stavebnici
amatérského Rx(TRX) na 2m, který by zvládal SSB a CW?<o:p></o:p></p>
<p>Kdysi jsem měl postaveného Eléva (vyšlo v nějakém klínoveckém
sborníku) a přemýšlel jsem nad tím, že bych to trochu
zmodernizoval (smd) a zmenšil, ale už tenkrát jsem měl problém
s krystaly do oscilátoru aby se daly rozumně "tahat". Ostatně
ani tehdy použité jádra pro cívky nebudou rozumně dostupná. A
současná nabídka jader bych řekl že je max pro střední
frekvence.<o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Díky<br>
Petr<br>
<br>
<o:p></o:p></p>
<div>
<p class="MsoNormal">Dne 26.4.2017 v 23:19 Drátek napsal(a):<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif""><a
moz-do-not-send="true" href="http://www.dorji.com/">http://www.dorji.com/</a></span><o:p></o:p></p>
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<p class="MsoNormal"><span
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Original Message ----- <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#E4E4E4"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">
<a moz-do-not-send="true" href="mailto:balu@k-net.fr"
title="balu@k-net.fr">balu</a> <o:p></o:p></span></p>
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<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">To:</span></b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">
<a moz-do-not-send="true"
href="mailto:hw-list@list.hw.cz"
title="hw-list@list.hw.cz">HW-news</a> <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">Sent:</span></b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">
Monday, April 24, 2017 3:47 PM<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">Subject:</span></b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">
Re: maly prijimac 2m<o:p></o:p></span></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">chcem sa hrat... Takze aj ten IF signal
by bol dobry :-)<br>
<br>
<br>
On 24/04/2017 15:28, Zuffa Jan wrote:<br>
> MSK je dost narocne na synchronizaciu hodin,<br>
> klasicky Costas loop sa neda pouzit.<br>
> takze asi chces rovno seriove data...<br>
><br>
> j.<br>
><br>
> -----Original Message-----<br>
> From: Hw-list [<a moz-do-not-send="true"
href="mailto:hw-list-bounces@list.hw.cz">mailto:hw-list-bounces@list.hw.cz</a>]
On Behalf Of Daniel Valuch<br>
> Sent: Monday, April 24, 2017 3:19 PM<br>
> To: HW-news<br>
> Subject: maly prijimac 2m<br>
><br>
> zdravim osadenstvo,<br>
><br>
> v ramci maleho hobby projektu by som rad prijimal
signaly okolo 130MHz, ktore su MSK modulovane. Rad by som
to cele postavil ako maly, energeticky nenarocny obvod, do
ktoreho sa fixne naprogramuje frekvencia a z ktoreho si
vytiahnem dostatocne nizku medzifrekvenciu, alebo rovno
seriove data. Nechcem pouzit SDR, je to prilis zlozite, na
ovladanie a spracovanie seriovych dat je k dispozicii len
jednoduchy mikrokontroler.<br>
><br>
> Vie niekto doporucit nejaky maly hotovy modul, ktory
sa da lahko kupit?<br>
> Frekvencne je to velmi blizko 144MHz, mozno nieco
radioamaterske co sa da preladit? Ako som vravel vystup
idealne nejaky MF signal...<br>
><br>
> dik,<br>
><br>
> b.<br>
><br>
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<a moz-do-not-send="true"
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