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Re: #measurement Problems for reading SWR, Graph always mooves ! #measurement
Hello Pierre, Great observations and questions. I am not an expert at this, but I do recall a response to a similar question a few weeks about using the nanoVNA for antenna measurements. I recall
By Ken Sejkora · #21097 ·
Re: #measurement Problems for reading SWR, Graph always mooves ! #measurement
Pierre, I think you are trying to measure the antenna from a handheld transceiver? In such instances, the antenna uses the handheld transceiver as a ground plane to make up the other half of the
By Tom KD8AVF <kd8avf@...> · #21096 ·
#measurement Problems for reading SWR, Graph always mooves ! #measurement
Hi all, First time I post a question because i've an issue with my nanoVNA. Thanks to all for intersesting to it and many thanks for all your post ! I've learn so much things with all of you ! So
By pjbellin@... · #21095 ·
Re: Surgical Tubing for SMA connectors
Very good. You have to buy more from the kitchen storage, so you get our stuff too. 73, Gyula HA3HZ -- *** If you are not part of the solution, then you are the problem. ( http://ha3hz.hu/ ) ***
By Gyula Molnar · #21094 ·
Re: Surgical Tubing for SMA connectors
Here's how I handle the H4 cal kit. I raided our kitchen for a small screw-on lid container. Then I mounted some chassis feedthrough connectors to the lid and connected up the cal kit. I also store
By Jim Nadal K6MU · #21093 ·
Re: Bad Cable
In the past I have cracked or cut open the connector on the bad end and repaired the cable. Yeah, I know, it's a cheap cable. I don't do it because it's cost effective. I do it for the fun and
By Jim Shorney · #21092 ·
Re: Bad Cable
One end may still be good. Thought I might need a pigtail. I do use usb a as a 5vdc power for projects. Nice plug without data. Bad usb hub still working for power.
By jac hil · #21091 ·
Re: Surgical Tubing for SMA connectors
I used heat shrink, colors like my earlier VNA Black for short Green go 50 ohm Clear for open. Wanted purple for 75 but didn't find any yet.
By jac hil · #21090 ·
Re: Surgical Tubing for SMA connectors
I would say that if you calibrated with the connector saver on you should be good to go. Just as long as the connector saver is of decent quality. Joe
By Joe · #21089 ·
Re: Surgical Tubing for SMA connectors
I second Joe's (K1IKE) recommendation of using a "connector saver". I just realized I had a couple of them in my connector box so they will be installed immediately. The major part of my career was in
By 2sheds · #21088 ·
Re: Surgical Tubing for SMA connectors
Joe, At least on the three NanoVNA-H's and one NanoVNA-H4 I have, the standards do have rotating nuts. There was no easy way provided to prevent the centers from rotating, however. I cut a
By John Gord · #21087 ·
Re: Surgical Tubing for SMA connectors
That depends on where you got them. The ones supplied with Hugens H4 rotate and the ones I got with a clone before that one also rotate. This is true for standard SMA connectors, but the
By Dragan Milivojevic · #21086 ·
Re: Surgical Tubing for SMA connectors
Hello Gyula and all, This is true for standard SMA connectors, but the short/open/load tools supplied with the NanoVNA do not have separate rotating collars on them. The 3 devices are one solid piece
By Joe · #21085 ·
Re: Surgical Tubing for SMA connectors
https://www.globalindustrial.com/product/itemKey/32146199 These are nice cases for the nanovna and tinysa! Get Outlook for Android<https://aka.ms/ghei36> ________________________________ Sent:
By radioage · #21084 ·
Re: Surgical Tubing for SMA connectors
Hi Roger, It is unfortunate to blend silicone tube and SMA in this way. Because the fixing nut, which should rotate, cannot rotate, but forces the fixed to remain with the middle mandrel and move
By Gyula Molnar · #21083 ·
Re: Data Corrupt Error
Did you set the number of points to 101 under the sweep settings on the nanoVNA? Version 3.9 is known to have some bugs. Try 3.8 Roger
By Roger Need · #21082 ·
Re: Data Corrupt Error
Then let's run to him again. See the latest version of NanoVNA-Saver 0.3.8. screenshot. There is a program running on your computer that you think is displaying incorrect data. There may be setup
By Gyula Molnar · #21081 ·
Re: Surgical Tubing for SMA connectors
Interesting what you can find if you look around. Where I work I often get surplus zippered gig bags from microphones and other small items. These work nicely for small portable devices. The one I
By Jim Shorney · #21080 ·
Re: Data Corrupt Error
The PC software is NanoVNASaver version 0.3.9 Max
By Max Donoghue <ve3tmt@...> · #21079 ·
Re: Surgical Tubing for SMA connectors
This is a great idea! Three thoughts to contribute: 1) Be careful about installing the tubing in a way that makes you "spin" the SMA connector instead of the SMA nut - to preserve the center pin
By af4ze@... · #21078 ·