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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

This is the weakest element of this device. It has not worked since the beginning. I have 3 weeks. I need information about the type of this switch and where to buy it. I will order 2 pieces.

had the same issue with mine,the flimsy legs snapped off my jogwheel,managed to dremell away the plastic put 3 blobs of solder on the remains of the legs then sweated it back on the pcb,good idea but

https://www.aliexpress.com/item/33050391766.html?gps-id=ru_edm_recommend&scm=1007.25755.141389.0&scm_id=1007.25755.141389.0&scm-url=1007.25755.141389.0&pvid=bab08c6b-e895-46a1-8f1f-0bdbfbd25665&userTo

i found the jog wheel fine to use,just a badly made piece of crap tho!,would be fine if better made!

The errors scale proporionally with wavelength. I use my VNA mainly around 900 MHz in RFID development and applications. Here a single mm path length is on the threshold of an acceptable error for me.

I'm sometimes (often) also mathematically challenged so I perform a sanity check when doing these type of measurements. Instead of the coil connect a 25 ohm 1% resistor (or some other value different

To the mathematically inclined from the mathematically challenged... I understand the obsession with eliminating measurement errors. But how much error are we really talking about here? Suppose I take

Slawomir, BH5HNU, the developer of the NanoVNA-F, is generally responsive to hardware issues when you bring them to his attention at /g/nanovna-f/messages . You might leave a message

I was referring to instances when the sellers item says "fulfilled by Amazon" and that happens a lot, then you no longer have a choice, they will make it for you, and sometimes there are no other

Not claiming I am competent to do this I would like to try to summarize in limited amount of words what this thread has provided It adds value for VNA measurement, due to its internal transform, to