<div dir="ltr"><div>I am not sure what version of the VNA software for Hermes is causing your problem but a<br></div><div>long time ago around 2013 I did some work on the original VNA code for Hermes as it had <br></div><div>problems connecting.</div><div>I did this in conjunction with Phil Harman and I ported some code from the "KISS Konsole"
and</div><div>with the addition of repeated tries to connect I got it working reliably and I think this version</div><div>was published and had my callsign on the about box.</div><div>Then I found this version:</div><div><a href="http://www.dxatlas.com/hamvna/">http://www.dxatlas.com/hamvna/</a></div><div>Which worked reliably with the Hermes and had no problems with connecting but the remaining</div><div>problem is that while the Hermes is an excellent SDR transceiver it is not a very good VNA!</div><div>This is because leakage between the TX and RX terminals, limiting its dynamic range. <br></div><div>Made worse if you have the necessary RX/TX switching connected. Direct connection to the</div><div>Hermes SMA connections, it is just acceptable.</div><div>I was so impressed with HamVNA that I modified the code to also work with my dedicated N2PK</div><div>VNA.</div><div>Then I found NanoVNA available on eBay for less than £50 which goes right up to 900MHz and that</div><div>is now my VNA of choice.</div><div>Just my view on the VNA for what it is worth.</div><div><br></div><div>73's</div><div><br></div><div>Martin G3OQD.<br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, 6 Dec 2020 at 16:58, Helmut Oeller <<a href="mailto:dc6ny@gmx.de">dc6ny@gmx.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">***** High Performance Software Defined Radio Discussion List *****<br>
<br>
Very, very strange, John.<br>
<br>
I'm no software coder and sorry, I don't have further ideas available.<br>
Many, probably most HPSDR fans are using today win 10 as OS. Even my old<br>
Ozy on an ATLAS configuration works great with PowerSDR v.3.4.9 and win 10.<br>
<br>
Hopefully somebody can help you soon.<br>
<br>
73, Helmut, DC6NY<br>
<br>
<br>
Am 06.12.2020 um 16:55 schrieb <a href="mailto:radio@netins.net" target="_blank">radio@netins.net</a>:<br>
> Thanks Helmut.<br>
><br>
> I am having trouble getting hamVNA to install. It worked OK before I<br>
> replaced Windows 7 Pro 64 with Windows 10 Pro 64. I later uninstalled<br>
> it and tried to install hamVNA2 a couple of years ago, but later<br>
> uninstalled it, too. Hermes VNA worked fine until I installed Windows<br>
> 10.<br>
><br>
> Today, I did get hamVNA to run once, launching it by selecting run<br>
> during the install but it would not connect to Hermes. Attached is a<br>
> screen shot. However, it could not find Hermes.<br>
><br>
> When I click on the icon for hamVNA it doesn't load the program.<br>
><br>
> Windows 10 is very frustrating. I can't find where to make a program<br>
> run in Windows 7 compatibility mode. It wants to try Windows 8!<br>
><br>
> Any ideas what I should try next?<br>
><br>
> John, W0GN<br>
><br>
><br>
> On 2020-12-05 10:09 am, Helmut Oeller wrote:<br>
>> Hi John,<br>
>><br>
>> your issue is really strange. I also attached a screenhot showing the<br>
>> connection data and a measured object.<br>
>><br>
>> I can't tell you what version of NET is working here, because NET was<br>
>> automatically installed together with win 10 and no longer listed in the<br>
>> general app file. But I have also different versions of MS Visual C ++<br>
>> 2008/2010/2013/2015 Redist... on the machine as well as win10Pcap.<br>
>><br>
>> May be you should try to use 'discover function' with the HPSDR<br>
>> programmer tool to verify connection data. Another option can be the HAM<br>
>> VNA v.1.1:<br>
>><br>
>> <a href="http://www.dxatlas.com/hamvna/" rel="noreferrer" target="_blank">http://www.dxatlas.com/hamvna/</a><br>
>><br>
>> This a very comfortable VNA software for Hermes too.<br>
>><br>
>> Hope for soon success.<br>
>><br>
>> 73, Helmut, DC6NY<br>
_______________________________________________<br>
HPSDR Discussion List<br>
To post msg: <a href="mailto:hpsdr@openhpsdr.org" target="_blank">hpsdr@openhpsdr.org</a><br>
Subscription help: <a href="http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org" rel="noreferrer" target="_blank">http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org</a><br>
HPSDR web page: <a href="http://openhpsdr.org" rel="noreferrer" target="_blank">http://openhpsdr.org</a><br>
Archives: <a href="http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/" rel="noreferrer" target="_blank">http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/</a></blockquote></div>