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I send this version to Gyula Molnar for test (he also install 32,786 kHz crystal directly to the PC14 and PC15). It enable use LSE generator for RTC, and clock should tick while power o

Hi DiSloard, I have one of those old NanoVNA's with the place for a SD-card socket in the Layout. I soldered a SD-card socket. I used a Transcend 2Gb SD-card (FAT formated). All works fine using Your

Correction on my previous post. I used NanoVNA H4 v0.9.3.2 beta-SD Card LSE_Clock.dfu firmware.

I set the time using Tera Term and here are the results. Thanks once again.

ARRGH, had a long response written and went to check some numbers and lost it all. TWICE!

Actually, they are very cheap and certainly not useful for a VNA. As you tighten them, the centre pin rotates, as the whole body rotates. A decent load does not. You should never rotate an RF

This is what I ordered from Amazon. They are high quality and each measured 50 ohms. USA made by Amphenol that makes the best RF connectors. Amphenol Connex 132360 (Pack of 4) RF Terminators SMA Male

You can set time by use time command See this post /g/nanovna-users/message/13957 You use this? from post /g/nanovna-users/message/13941 NanoVNA H4 v0.9.3.2 beta - SD

I'm just starting to learn how to use and what everything means, and have never used a VNA. I'm using a NanoVNA H4 Purchased from R&L. As you may know it comes with OSL and a barrel to calibrate the

Your loss is too high and you can get a fraction of a dB with the right ferrite mix selection, number of turns and winding arrangement. From your design description it seems that you want to go as low

Thanks to all of you who tried to answer my question [rather than complaining about me asking it :-) ] Thanks, particularly, to Bruce for some support there! The idea of using two 50 ohm loads on a

As a double check I would calibrate at the end of the cable using the supplied S-O-L Then hook up to the SDR board with load and see how it compares to Cal Load. A perfect 50 ohm SM resistor is hard

Sorry, its not the KARN, its the ANNE-50X+. Someone else mentioned another model from Minicircuits. Pick whatever has the best guaranteed performance over the range you want. Ignore the typical

A Minicircuits KARN-50X+ is a pretty decent male load. Mechanically they are good, and do not rotate as you screw them in. However, unless you either pay lots of money, or pay someone to measure one

Thanks DiSlord, I installed miniSD reader and 32.768 kHz xtal on PC 14 and PC15 on my H4 as per your instruction. The screenshots, s1p and s2p can be saved now on the SD card. I used the NanoVNA H4

This model from Mini-Circuits is a good quality unit: https://www.minicircuits.com/WebStore/dashboard.html?model=ANNE-50L%2B About $7.

I received my NanoVNA-H4 from AliExpress in just 10 days, and am happy with my purchase. However, the 50 ohm SMA calibration load goes intermittently open. The cap rotates even when the load is

Thanks Erik, I reread the page I got that from and ya, I got it backwards. " If S11=0 dB, then all the power is reflected from the antenna and nothing is radiated" I see it now. Thanks, Mikek

Return loss is determined by how much the the thing connected to CH0 is deviating from pure 50ohm. The more perfect the thing, the higher the return loss (e.g. no echo from bad impedance matching) So

I have the Test board from SDR-Kits as shown in the Attachment. I've had inconsistent results measuring two back to back 50 ohm to 100 ohm transformers. At one point I measured -0.4db loss for two and