Re: Selector switch damaged
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"
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Jim Shorney
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#9234
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Re: F303 and 4" LCD for next generation NanoVNA
#circuit
#flash_size
#improvement
#enclosure
#battery
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
By
Hugen
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#9233
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Re: Battery standby life
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
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Hugen
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#9232
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Re: F303 and 4" LCD for next generation NanoVNA
#circuit
#flash_size
#improvement
#enclosure
#battery
Thank you for your translation. hugen
By
Hugen
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#9231
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Re: Battery standby life
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
By
bc
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#9230
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Re: Battery standby life
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
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hwalker
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#9229
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Re: Battery standby life
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
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Larry Rothman
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#9228
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Battery standby life
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
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Andy <punkbiscuit@...>
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#9227
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Re: F303 and 4" LCD for next generation NanoVNA
#circuit
#flash_size
#improvement
#enclosure
#battery
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
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Roger Need
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#9226
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Re: Selector switch damaged
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.
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slawomir.kleczyk <ssb@...>
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#9225
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Re: Selector switch damaged
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
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Paul M3VUV
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#9224
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Re: First PCB pictures of the V2
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
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Paul M3VUV
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#9223
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Re: First PCB pictures of the V2
i found the jog wheel fine to use,just a badly made piece of crap tho!,would be fine if better made!
By
Paul M3VUV
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#9222
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Re: test fixture - how bad can it be? A non-rhetorical question
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.
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Reinier Gerritsen
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#9221
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Re: test fixture - how bad can it be? A non-rhetorical question
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
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Erik Kaashoek
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#9220
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test fixture - how bad can it be? A non-rhetorical question
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
By
KI7MWA
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#9219
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Re: Selector switch damaged
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
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hwalker
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#9218
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Re: Alibaba ordering
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
By
nanovnagroup@...
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#9217
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Re: errors of "error" models
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
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Erik Kaashoek
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#9216
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Selector switch damaged
Hi to all, a few days I received NanoNVA-F. I bought on Aliexpress. Unfortunately, the rotary switch only worked one way and blocked the functions on the touch screen. I had to undress it but repair
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slawomir.kleczyk <ssb@...>
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#9215
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