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I haven't measured the parts yet. I have checked the capacitors are correct based on the markings and that the torroids have the correct number of turns. All 4 filters that I built show the same

Gm7 double check your C's value and measure all L that are in your board Al CX8AT

Have you tested the parts to make sure you have the correct values? Marco

Thanks for your response. I had seen that and other related questions on Stack Overflow. I tried some of the suggestions given, as mentioned in the original post.

Thanks Dave, Your simulation is the response I expected. Unfortunately i's not the response I'm measuring. I re-calibrated and then used the Smith Chart as a sanity check. I got the expected results

After a full charge (usb connector led steady) , power it on, get white screen, with the led next to the power switch flashing. Ring a bell? Haven't found where in the users the flashing is mentioned

I modeled your 40-Meter LPF using your values on ELSIE. Please see attachment for the results of what you should measure for pass characteristics (S21). Dave - W?LEV -- *Dave - W?LEV* *Just Let

yes: https://stackoverflow.com/questions/9644099/python-ascii-codec-cant-decode-byte

Hi, thanks for the replies. It's a QRP Labs filter which uses the 7 element design shown in the attached schematic. I attached the wrong image in the first post. That's the response of the 40m filter,

Which schematic and values did you use? That amplitude curve is weird. Also, VSWR is very high on marker 3 (30 m) José, CO2JA

True. Something does not look right. Rather than running 3 through 50 MHz, try setting, calibrating, and measuring 5 through 20 MHz. Also, before you measure, to check your cal., do a Smith chart of

Hi All, I'm trying to test a set of Low Pass Filters for 40m, 30m, 20m & 10m. I'm getting consistent results for each of them but not the results I expected. I'm struggling to establish whether the

Dear Cliff, Thank you, my biggest problem that i am new in linux enviroment, so far I developed under windows. I can try to understand your advice... If I have results or new question then I will come

Kedves Gyula, K?szi, megnézem... Nagy 73, Zoli

Hi, all- First off, I have seen the many threads related to PyQT5, and I do not believe that this is the problem. Additionally, since Arch / Manjaro Linux is a distribution with rolling updates, the

Thank you for the info, hugen. If there is no 8MHz xtal - I assume I will see the "Unknown USB device on port xx" error? Since I can push S/W to the unit using my ST-Link,? do you know the location

Hello Larry, STM32F303 comes with a bootloader, but you must connect an external 8M crystal to use DFU mode. This is why the independent 8M crystal is used on the nanoVNA-H4 instead of the 8MHz clock

Ken/Hugen - I just installed a new ST32F303 on to my original NanoVNA and it is not recognized by USB (Yes, I installed 1.5K pull-up on pin33) so I assume I need to install the DFU bootloader. Where

Link for case https://www.prusaprinters.org/prints/30212-case-for-nanovna-v2

Yep, this is exactly what I do in courses. If you know what loss is, and know what is meant by return loss, reading a text with a plus or a minus is no real bother. But if they have to write up