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Hello Dennis & Tim! Thanks for the reply and ideeas. From what you said, it seems that I have no other solutions but to try several versions of firmware swapped with various USB-C <> USB-A cables

In my modeling of an EF wire, be they 1/2-wavelength or not, a 9:1 is far more in order than a 49:1 or even higher ratios. Reason is for any "reasonable" and amateur typical heights above soil

Barry, The phase is just wrapping around 180 degrees.? Not to worry. Jay KM4EP

* * *Here is my? "MODIFIED"? 155 FT END-FED? wire WITH?? 9:1?? UNUN (Palomar Engineering) ? and? T-network? CLC tuner in shack* *Lowest? SWR? set to around 7100 kHz? with a RETURN LOSS?

If one had a lossless transformer for an End Fed Halfwave EFHW one would expect low SWR on the harmonic multiples of the fundamental frequency, such as 80 40 20 and 10 meters. I attribute the low SWR

I would suggest looking into the SAA-2N, I got mine from R&L. The type N connectors, cables and calibration standards appear robust and work well. The steel case is a plus. 73, Don N2VGU

I have an end-fed antenna with switch-selectable 49, 56 and 64:1 ratios. It's covered with heat shrink so I haven't looked inside. Checks out OK with VNA. 73, Don N2VGU

Ok, it is the testing insertion of the *two boxes end to end*. This doesn't tell us anything about the functioning of any *one* of the boxes. Even if it's Uncle Sam who does the measuring -- F1AMM

Jim, The 56:1 can be seen at the Myantennas website. https://myantennas.com/wp/product/efhw-8010/ They have a similar transformer with the 49:1 and state it can be in the horizontal L config. On the

I consider a 56/1 wideband transformer to be a utopia (I could be wrong). The fact of presenting measurements by joining two transformers head to tail does not assume anything about the operation of a

Thanks all for the pointers. It seems that R&L and AURSINC both sell the NanoVNA. I am familiar with R&L, have purchased from them both online and in their store in SW Ohio. Their NanoVNA H4 is only

R&L. USA storefront, run by hams, fast shipping, and they know what you are talking about when you contact them. https://www2.randl.com/index.php?main_page=page_3 73 -Jim NU0C "Roger Jollis"

AURSINC was recommended from Groups.IO at Amazon. I got a NanoVNA-H from them. I had a problem, they replaced no questions asked. I like what I have and can recommend.

Just buy from the official AliExpress store or from an authorized reseller ...

I bought both an H4 and TinySA Ultra from R&L at the strong recommendation of several. Both units are very good and good distributor that stands behind them.

Hi all. I have looked for past postings for my question, but don't find a >recent< answer. So here's my situation. I have destroyed my second NanoVNA, an H4 model that I bought last July to replace my

The USB port does not define the connectivity protocol, just the physical interconnect, and if DFU is working (part of the bootloader), but the COM port mode isn't, then that could also be a bad

15:2 ratio? Approx. Cheers, Paul

56:1? That’s kind of a weird ratio. 49:1 is easy, it’s 7:1 turns ratio (impedance goes as the square of the turns ratio). 64:1 would be 8:1 turns.

FWIW, I had a similar problem with my NanoVNA-H. It wouldn't work with the USB-C cable that came with my Hantek Oscilloscope. It wouldn't work with the USB-C cable that came with my cell phone. I