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Bent,<br>
The hermes receiver includes the RLP-50+ Low Pass Filter chip
(see <a class="moz-txt-link-freetext" href="http://www.minicircuits.com/pdfs/RLP-50+.pdf">http://www.minicircuits.com/pdfs/RLP-50+.pdf</a> ). This on
board LPF may be very difficult to bypass or to replace.<br>
<br>
HTH,<br>
Bill KC9XG<br>
<br>
<div class="moz-cite-prefix">On 9/9/2014 1:29 PM, Bent Andersen
wrote:<br>
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<div dir="ltr">HI Helmut
<div><br>
</div>
<div>tnx for reply.... I am a Newbee in this type of
transiver...but do you say that it is possibel to mod a
Hermes...if you change the LPF in the RX/TX and build a new</div>
<div>external board whit a mmic-amp... or do I have to look for
a anothere transiver....????</div>
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<div>Bent</div>
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<div class="gmail_extra"><br>
<div class="gmail_quote">2014-09-09 20:11 GMT+02:00 Helmut
Oeller <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:dc6ny@gmx.de" target="_blank">dc6ny@gmx.de</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Bent,<br>
<br>
it is NOT possible run Hermes in 3rd Nyquist zone without
major mods at the<br>
filtering. I modified an Atlas-based HPSDR setup for 144
Mhz. Undersampling<br>
works also on VHF with good performance (details under<br>
<a moz-do-not-send="true"
href="http://www.hamsdr.com/dnld.aspx" target="_blank">http://www.hamsdr.com/dnld.aspx</a>
9/19/2013)<br>
<br>
73, Helmut, DC6NY<br>
<br>
<br>
-----Ursprüngliche Nachricht-----<br>
Von: Hpsdr [mailto:<a moz-do-not-send="true"
href="mailto:hpsdr-bounces@lists.openhpsdr.org">hpsdr-bounces@lists.openhpsdr.org</a>]
Im Auftrag von Bent<br>
Andersen<br>
Gesendet: Dienstag, 9. September 2014 19:15<br>
An: <a moz-do-not-send="true"
href="mailto:hpsdr@lists.openhpsdr.org">hpsdr@lists.openhpsdr.org</a><br>
Betreff: [hpsdr] Hermes 144mhz<br>
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