Hi All, I'll be making an update in a few weeks to the N2PK VNA pictures at my website as seen here: <http://n2pk.com/VNA/Pix/VNApix.html> If your VNA is not...
Mine is on the yahoogroups site I believe... 73's Glen K4KV ... From: N2PK-VNA@yahoogroups.com [mailto:N2PK-VNA@yahoogroups.com]On Behalf Of Paul Kiciak Sent:...
Hi folks, I just finished assembling my Ivan's V5 board. What to do now? Which PS do you recommend? Would anyone here have OM3LZ contact? Does he sell that as...
Hello Felipe, OM3LZ's power supply PCB is probably your best choice if it is available. Hopefully Miro will respond to your request. Both detectors need +9 to...
Thank you Paul! 73, Felipe ... -- Felipe Ceglia - PY1NB ... PR1T team member /// Rio DX Group member /// Araucaria DX Group member http://www.dxwatch.com ///...
Hi Gang. I am just getting started on my VNA. I am waiting for the partially assembled board set and need some assistance in acquiring a few of the parts. ...
Welcome to the VNA world. Miro OM3LZ has been away from home, but expected to be back around first of this month. His email is miroslav.ivan@... . He...
Thanks Wes, I just sent him an email. 73, Felipe ... -- Felipe Ceglia - PY1NB ... PR1T team member /// Rio DX Group member /// Araucaria DX Group member ...
Hi all, does anybody know of a free RF simulator that can import and cascade multiport s-parameters from snp files with n>2? My up to now favorite APLAC can do...
Hello, Power supply requirements must not be all that critical, because my power supply is simple, and I see no bad effects on the VNA. I use 13.6VDC from a...
Hi Glen, I have an old 9VDC Ethernet module that takes 5V in and produces 9V out. I hope to make my VNA totally USB powered eventually, to enhance portability...
Hi Glen, Power supply requirements must not be all that critical,... The original VNA power requirements are on pg 14 of ... Power Requirements a) Input DC...
Hi all, I want to share my findings in case someone is interested in simulation as well: 1. QUCS can basically do what I want. Only drawback: Exporting...
Paul, Like I said, I have not tried it yet. I did add a battery tray to get my clean 9V for field work, but I am not a fan of batteries, bc I am apt to forget...
... That's usually called drift. How long has your VNA been operating and in what environment? Mine doesn't get turned off. (And no, it doesn't run on...
Hi Glen, I personally have never used a buck boost circuit. switching circuits are not the greatest in a/d circuits. True but my switching reg. in my Part 2...
Maybe your calibration standards have too much inductance or capacitance. A wire short for the S in SOL will have inductance. As it has been said on the VNWA...
Hi, I am currently using some regulators: 15v->7809->7805 for DDS & one 7809 for each detector. And I am having a lot of fun with it! Paul, please share...
Well, as far as drift is concerned... The scan is done immediately after the cal is done, and the exact same waveform can be repeated 5 minutes from then, 30...
Paul, I am using the suggested 0.1% 0603 100 ohm resistors right on the bottom of the SMA connector. A N-to-SMA adaptor right on the bridge box's N female...
Hi Glen, I was trying to suggest that there is something wrong with the software calibrate routine, because it did not do what I told it to do. It was told to...
Paul, You are absolutely correct on the Reference Standards. I will try and do some reading on the subject, and then adjusting these values. They cannot be...
Hi Glen, I will try and do some reading on the subject, and then adjusting these values. I would suggest starting by first recording the defaults for the...
I have a question about VSWR. Assume you have a perfect system: 100 watt transmitter with a 50 ohm output Z. A lossless transmission line with a characteristic...
... No, I think not. Stepping back a few paragraphs, and assuming all your other math ... OK so far. ... Assuming you meant to write -100 and -20 volts, OK. ...
My interpretation of return loss is this: A return loss of 14 dB means that the reflected power is 14 dB below the power that the transmitter produces into a...
... Yes. ... You need to be clear exactly what you mean by maximum and minimum. I think you are not asking about the maximum peak voltage and minimum peak...
In case your goal is to actually go looking for the peaks and valleys of signal amplitude, keep in mind that the place where they occur depends on the phase of...
