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Lithium chemistry battery charges have a setting called "Storage Charge". Why? Because storing batteries with a full charge contributes to the swelling that you see. All my RC plane batteries are

The RF Demo Kit NWDZ Rev-01-10 is available via Ebay for about 15 EUR. A documentation can be found at: http://deepelec.com/rf-demo-kit . I will just extend it a bit about details and *practical*

What does the VSWR trace look like? *Clyde K. Spencer*

Add the Firefox Downloadthemall add-on to your FF browser. Takes < 1 minute to get all the files.

Hi Gary, I just wanted to make that I answered your question as to why a Short and an Open are not plotted at -1 and +1 after calibration. (The short answer is: because their actual Gammas do not

I have had bad experiences with N connectors, even of the "precision" type on high-quality equipment (interconnections between mainframe and S-parameter test set on HP VNAs, for example). Getting a

Because of popular demand we replaced the jog switch with buttons (see attached). Yes these are through-hole so should be able to take some force. (Also note the SMA connector on the actual product

Hi all,talking of the jog switch,im thinking of fitting buttons to mine,just wondered is the common pin the center leg,looking from the rear ond the top left pin the enter connection?,thanks in

On my nanovna clone the battery was slightly bulged from the factory. It's mad that the known wouxun fault from 2010 still persists (they put the battery voltage measurement voltage divider BEFORE the

Jeff, Erik, and John; Thank you all for your patience with me on this. I at least feel comfortable with what I think I understand so far. Once again I failed to express myself correctly and used the

OK well I know that the supplied battery is about 350-400ma and I get about 2.5 hour running time. That to me says that the battery it good. So it could be a high leakage / quiescent in the switch

Same problem here. I purchased two from eBay seller harborcityelectronics, see item # 121096249091. Repair was straightforward with no issues and I have a spare. 73 -Jim NU0C "slawomir.kleczyk"

It is really a good design. I am trying to improve the performance of the current version of nanoVNA 300-900MHz. I will consider using N-type connectors after completing the related improvements. Will

At the beginning I added ip5303 to NanoVNA just for my convenience. But I didn't expect it to be so popular with the community. Now I have realized that this design is not reasonable and has been

Thank you for your translation. hugen

I finally found a few posts relating to this in the archives, and have to agree there's a problem. Someone had measured about 60?A of leakage when off - try measuring this on your unit and see how

On Mon, Jan 6, 2020 at 01:37 PM, Andy wrote: " .. I had mine charged, and left it on the shelf for a few weeks and it died on me." =========================================================== All

I've noticed that my second unit's battery is starting to swell a bit. Time to swap it out.? I think the batteries used on the copies of hugens unit are of low quality and are not lasting? as long

Has anyone noticed that the shelf life of the Nano VNA seems a bit short ? I had mine charged, and left it on the shelf for a few weeks and it died on me. Seems to me to be some sort of high quiescent

Google translate had a slightly different but important statement at the end on availability.... "AA6KL is further improving its development. NanoVNA-H with STM32F303CCT6 and 4-inch display will be