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Ali Express insists on setting an address that it incorrect, it has a drop down list of cities and my place is not on the list so it did not work. Therefore I did not place an order. There are a lot

Mine (early amazon buy at 39$, that has internal shielding) meets 20db+ to its upper limit (900mhz). Since primary usage is less than 500mhz its adequate. If I need better I just put a 6DB pad ahead

'm not sure I completely agree :) Fortunately (or unfortunately) the transmission line acts as a impedance transformer. Given the length of the transmission line, impedance "shown" on to the TX might

To directly answer you final question, SWR is the same throughout the length of a transmission line. Losses in the transmission line will make the SWR higher toward the antenna end, but usually not by

Hello, Thank you for your anwer Ok, please find below the same test but done without any cables on port 1 and only a through cable to connect to port 1 and port 2. I have also used 400 points to get a

I'll assume you have 50 ohm coax from transmitter to antenna tuner. From antenna tuner to 25 ohm antenna is 100 ohm coax. The antenna tuner is adjusted so the transmitter sees a 1:1 SWR in the coax

Might appear to be slightly off topic, but I hope it's not :) Lets assume we have ideal/lossless "everything" from end to end. Source (TX) is pure 50 Ohm, the same with coax 100 Ohm, antena 25 Ohm.

I asked a friend to solder me a test load of VSWR 1.5 and now, before measuring, I always check the correctness of the settings and calibration, if something is wrong, it is always and clearly

Are you sure you had the proper port selected for the SWR trace? S21 not S11? *Clyde K. Spencer*

-same problem-solution return nano -2nd nano reads 1;1.19 with dips=another return, The dips are at the right freq. but read 1: 1.09

Hugen This is my third nanovna purchase and appreciate the UPS service Keep up the good work John VE3IPS

Thank you for opening my eyes to the various ways of calibrating for non-insertable devices. Much of what you generously shared is above my paygrade, so to speak. So, I plan to re-read your post

She is on "leave" if I remember correctly

/g/nanovna-beta-test/topic/76204167 - but you need access permission. -- Terry VK5TM https://www.vk5tm.com

Seems the half wavelenth of coax thing would be accurate only on a very narrow range of frequencies (and harmonics). Calibrating a VNA through the coax can cover as much spectrum as you wish. Jerry,

You can match/measure the feed point of your antenna by using an _electrical_ half wavelength or multiples thereof, between the tuner/analyzer and the antenna. Larry, K4MLA

Even if the standards are 180 degrees apart in phase, the calibration routines need to know the exact phases at each frequency. +100 degrees and -80 are significantly different from +110 degrees and

I have been gone for a few weeks. Where did the downloads for OneOfEleven go? I went to he old GitHub link and it is broken. Gary

On 8/18/20 5:02 PM, Jim Lux wrote: > On 8/18/20 4:10 PM, AA7US wrote: >> I’ve searched for hours and so far come up empty handed... >> >> Does anyone have a suggestion for a soft, clamshell style,

In addition to the suggestions in my last email... There are a wide variety of soft sided cases made for portable games (your Nintendo Switch, for instance) with pockets for adapters, games, etc.