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Both Correct. Per the Coilcraft datasheet, it's a regular transformer with primary and secondary windings, with high side isolated from ground. Nooelec calls it a "balun" (marketing?), but Coilcraft

Please, guys, when you speak of a 1:n transformer. always specify whether n represents voltage (turns ratio) or impedance. It is often not clear from context. Thanks, Dana

See msg #1252 Alan

You can homebrew a decent low frequency bridge and use a couple of opamps to accomplish the task. I posted the operation in another post message and with an LT Spice schematic. Will see if I can

Probably, but you'd have to change the mixer coupling caps and the bridge circuit.? ? ??Here's your chance to play and let everyone know if it works!? Also, the output is a square wave so you'd

Let me guess: no, it cannot be done. Rather use MLS with your PC soundcard. (Maximum Length Sequence) There are expensive commercial sytems like CLIO. http://www.audiomatica.com/wp/?page_id=1441 For a

Is there any possibility of customizing the NanoVNA software for a lower frequency range? Yup, I wrote lower. Aside from Ham radio HF applications, I would like to be able to characterize custom

If MCU is changed from original nanoVNA, then I guess also need change to NANOVNA_STM32_F072/board.h for BOOT_FROM_SYTEM_MEMORY_MAGIC_ADDRESS ADC1 address is buried in ChibiOS/os/common/ext/CMSIS/ST/*

Yeah, there is flux all over and it looks like someone learning to solder assembled it. \_('_')_/ Sent from Rogers Yahoo Mail on Android On Fri, 13 Dec 2019 at 9:51 am, Oristo<ormpoa@...> wrote:

I am not sure that makes it an effective balun. Or maybe at best a voltage balun, but not a current balun - which is what antennas require. As I recall, it is not possible to make a current balun,

Hi Larry - Sorry to learn that; I suppose only ones from Ukraine are better. Leaving 100 Ohm resistors NOT connected in parallel improves sensitivity for differences at higher impedances, but fixing

Hi Lajos I see you open phase is -0.22 degree at 250MHz and that equals 2.44ps delay. That look like you are suing the male open adaptor which in my calibration document gives has a offset one way

Its both 1:9 transformer with the 9 side not connected to ground -- NanoVNA Wiki: /g/nanovna-users/wiki/home NanoVNA Files: /g/nanovna-users/files Erik, PD0EK

No, at least in ttrftech firmware, only the first argument can be one of {start|stop|center|span|cw} It is sad (to me) that so much code is wasted on useless "flexibility".

Is it really a balun or a 9:1 transformer? Only a CMRR measurement would show that up. I find that today the word balun and unun are almost always used to describe a transformer with unknown CMRR

#83 : On the Doubtfulness Hello, Allow us, please, to announce that, as it seems, we may just found the deep source of doubtfulness and in the following way : we thought that we had to think

Hugen, Is there going to be a selectable USB/serial port PC I/O mode for this version with the new uP? ThanksLarry On Fri, 13 Dec 2019 at 3:18 AM, hugen@...<hugen@...> wrote: I've made

Yesterday I received the Nooelec "Balun One Nine V2" and did limited testing. It uses a Coilcraft WB9-1 transformer, with a published 3dB bandwidth of .125-125MHz; interpolating the datasheet graph

From: nanovnauser@... my post code is ln95je,i put that and it says wrong format every time,tried it in caps too,same result,what should i put then? ========================================== My

Hi Kurt, I tried your latest How_to_display_delay_shift_for_a_cable_in_NanoVNA_saver.pdf method. Now I have many problems. I not understand what I do wrong, or what corrections/calibrations will be