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QCX/QSX Elmering and Discussion
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Ed Kwik
Hi Everyone! AB8DF is inviting you to a scheduled Zoom meeting. Please join us Monday Dec 9, 2019 7:00 PM Eastern Time / Dec 10, 00:00 UTC for our next QRP Labs QCX/QSX transceiver Chat where the main topics will be the QRP Labs QCX single band CW transceiver and the soon to be released QSX multiband CW/SSB transceiver. It's fun, it's easy, and it's free. You only need a computer, a smart phone, or a tablet that can connect to the Internet. OR if you can't be close to any of those you can join by audio with any standard phone. Just follow the directions below. No software needs be loaded or installed. MIQRP CLUB is inviting you to a scheduled Zoom meeting. Topic: MIQRP QCX/QSX discussion Time: Dec 9, 2019 7:00 PM Eastern Time (US and Canada) To join the Zoom Meeting go to the link below or type it into your web browser. You can elect to install the Zoom app or skip the app install. If you do not want to install the app click the link “join from your browser” One tap mobile +16465588656,,200792220# US (New York) +17207072699,,200792220# US Dial by your location +1 646 558 8656 US (New York) +1 720 707 2699 US Meeting ID: 200 792 220 Find your local number: https://zoom.us/u/acNZx5vn0N DATE HOST* Dec 9, 2019 7:00 PM Ed AB8DF Dec 16, 2019 7:00 PM Ed AB8DF Dec 23, 2019 7:00 PM Ed AB8DF Dec 30, 2019 7:00 PM Ed AB8DF Ed AB8DF |
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John Terry (W0JDT)
Just saw a youtube describing $40 "nanoVNA" budget network analyser. If it works, it would really help tune up the 10 bandpass and 10 low pass filters that will likely be a part of QSX. I have been prebuilding filters, and have ordered this analyser. Will report if it is good enough to set up the QSX filters! John N0jt |
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Hans Summers
Hi John Like QCX... the QSX contains all it's own alignment tools. In this case, filter alignment see https://youtu.be/_bMoR3Q6gzM 73 Hans G0UPL On Mon, Dec 9, 2019, 20:35 John Terry (W0JDT) <Jdterry414@...> wrote:
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geoff M0ORE
Some of these mini VNA's only have one port so, IMHO, difficult
to measure S12 or S21. A two port unit wil do all parameters.
Agilent make a few to look at. On 09/12/2019 18:47, Hans Summers
wrote:
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Eric-J
Hi all this post was talking about Nano VNA : 73 Éric F5JKK --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Another jig for those
LPFs and BPFs built here. Optimizing for S21 while checking on
impedance (S11) just becomes so much fun with the NanoVNA.
Especially if you use it together with a PC running NanoVNA saver.
Adapter.jpg
The adapter was made using a single sided copper PCB and employing the toner transfer method. I attach a few pics for your info and the .svg file in case you want to build one, too. Import in a graphics program (e.g. Inkscape) and print. Solder SMA females to the PCB and headers to plug the LPF/BPF into. Vy 73, Chris OE1CGS _._,_._,_
NanoVNA in use.jpg Screen BPF.jpg |
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Dave New, N8SBE
Hi, The .svg file attachment didn't come through. All I saw was three .png files. I'm interested in putting together a fixture like this, but I don't have the facility to etch my own PCB's. I'm building six LPF's for the U3s, and would like to check them out on my Rigol SA with tracking generator. I tried flea-clipping one up, but there is way too much leakage between the unshielded in/out leads to be of any use. 73, -- Dave, N8SBE
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Christoph Schwärzler
Hi Dave,
pls check my original message (https://groups.io/g/QRPLabs/message/40666). You will find the .svg file there. Vy 73, Chris, OE1CGS |
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Ryan Flowers
If you have an antenna analyzer, you can sweep a filter and get a pretty good idea of its performance. https://miscdotgeek.com/qrp-labs-band-pass-filter-tips/ |
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