The calculated inductance value includes self-capacitance. Some people call this effective inductance, but I just call it inductance since that's what you would measure with an instrument. Internally

Patricio, this calculator may interest you for inductor design. Its Q accuracy is within a few percent on average for test coils measured with an HP 4342A Q meter. Worst case Q error is < 10%. It has

Maybe just lifting the inductor ground lead while doing the open calibration would work. Brian

Patricio, thanks for correcting me about calibration nullifying port capacitance. However, I don't think it can nullify stray capacitance to ground due to a fixture or large inductor size. When using

I think the best way to measure inductor self-resonant frequency is to place it between the VNA ports and find the transmission loss peak. Using just a single port parallels its capacitance with the i

Brent, check out the Coilcraft SWB1010, SWB2010, and SWB3010 wideband RF transformers. They are cheap and readily available. Their response is very flat over HF. Depending on the accuracy you need, yo

No, Bob. Place one lead of the choke into the center conductor of the first VNA port. Place the other lead into the center conductor of the second port. Measure the power transmitted from the first po

The RLC model is an approximation valid only for a coil below parallel self-resonance. Series resonances occur above. These two papers cover coil self-resonance in detail: https://www.researchgate.net

http://ham-radio.com/k6sti/coil.htm Brian

Andy, the N in THHN means nylon. It's the clear outer cover over the PVC. If your THHN is like the stuff I've used for antennas, after several months you'll find nylon scattered about under the antenn

Many times I've been tempted to jump into a discussion of 5/8-wave verticals to point this out. The ones hams use at VHF do not deserve their reputation as a gain antenna. Modeling results for broadsi

François, I don't think the program documentation is suitable for you. I think you should try another program. Brian

This program is probably more accurate than a NanoVNA: http://ham-radio.com/k6sti/coil.htm Brian

Thanks for sharing your experience, Clyde. Have you used Bluetooth while measuring an antenna? I'm also curious about the range you get. HC-05 modules quote 10 meters. That would be enough to remotely

Here's a better idea: implement delayed recording. You press the VNA button and recording to the SD card begins sometime later. Neil might need a few minutes to haul the antenna with VNA to the desire

Perhaps someone who has installed a Bluetooth module in a NanoVNA can tell us whether they have noticed any interference, especially when measuring an antenna. That provides an opportunity for the Blu

Dave, do you have any evidence that installing a Bluetooth module causes interference with NanoVNA measurement? Brian

Roger, I don't own a VNA. I write programs that use Touchstone files. A few files originated from a DG8SAQ VNA, but most are from the NanoVNA-H4. The NanoVNA does not account for the port impedances w

I take that back. The vertical lines make it pretty easy to spot an embedded response. But there sure is a lot of unnecessary stuff to wade through. End of demonstration. Back to brief quotes. Brian

This equation is incorrect. Dave, I have quoted the entire message as you typically do. I want you to see how hard this makes it to locate a response within. Brian