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Re: SMA coax cables the kit came with -
Thank you all! I ended up grabbing one like this from the uber-large US seller: [image: image.png] (I don't like to advertise, so snip above) I initially wrongly got RG400 cables thinking they'd be as
By Radu Bogdan Dicher · #29682 ·
Re: SMA coax cables the kit came with -
Save yourself the grief and buy them with SMA already installed. There are a few US manufacturers over on that auction site that make them up in various lengths. 73, Dick, W1KSZ
By Dick · #29681 ·
Re: SMA coax cables the kit came with -
Look on wish.com. I picked up some from them and quite happy with it. Just search for rf coax wrote:
By Tominaz · #29680 ·
Re: DiSlord's 1.2.14; Smith Chart Marker Format
Use DISPLAY->FORMAT .... ->SMITH (need select it) and on next click SMITH need select value format
By DiSlord · #29679 ·
DiSlord's 1.2.14; Smith Chart Marker Format
Hi, I just upgraded to the newest version. It's DiSlord's 1.2.14. I recognized, that the smith chart marker now displays the impedanze (R +/-jX) and not the value of C or L in pF or nH. Is there a
By Uwe, DL4AC · #29678 ·
Re: SMA coax cables the kit came with -
RG316 50 ohm coax *Clyde K. Spencer* wrote:
By Clyde Spencer · #29677 ·
Re: SMA coax cables the kit came with -
You can buy ready-made SMA cables from Amazon and AliExpress (or similar). For example: https://www.amazon.co.uk/BOOBRIE-Coaxial-Connector-Pigtail-Emissions/dp/B09MRXCYKR There are PTFE variants:
By David J Taylor · #29676 ·
Re: SMA coax cables the kit came with -
https://www.aliexpress.com/item/32726071013.html?spm=a2g0o.order_list.0.0.62c51802ZQqmOB ?n joi, 22 sept. 2022 la 03:43, Radu Bogdan Dicher <vondicher@...> a scris:
By Costin R · #29675 ·
Re: SMA coax cables the kit came with -
I believe it's RG 316/u Bob VE3AMW ________________________________ Sent: September 21, 8:42 PM To: [email protected] <[email protected]> Subject: [nanovna-users] SMA coax cables the kit
By Bob VE3AMW · #29674 ·
Re: SMA coax cables the kit came with -
Looks a lot like RG-316/U https://www.amazon.com/Eightwood-RG316-Coaxial-Coax-Cable/dp/B0107RF56O
By Bob Snyder <bob@...> · #29673 ·
SMA coax cables the kit came with -
Hi all, Can anyone please help identify the type of coax the original kit SMA cables are using? I like the convenience of how skinny and flexible these cables are. I hate thick, rigid cables, that
By Radu Bogdan Dicher · #29672 ·
Re: NanoVNA-h4 stuck in DFU mode
I had mine "lock up" . I removed the cover, disconnected the battery, and measured VCC and found it to hold a small voltage. I shorted to GND, reconnected battery and it came back to life. I hope this
By Terry Wassell #1398 · #29671 ·
Re: NanoVNA-h4 stuck in DFU mode
that's the problem, i cannot get an image to load onto it. i cant even get the computer to get the correct driver for it. i have tried two different windows 10 21H2 machines that both show STM32
By Eric KO4ZEK · #29669 ·
Re: NanoVNA-h4 stuck in DFU mode
If the device is in dfu mode, install the firmware you want to use. When that's done you turn it off and on and it should work. The device will remain in dfu mode until you upload usable and working
By HA3HZ · #29668 ·
Re: 2 poles filters teminaison impedance
You need to build a proper test jig when you test components. Stray inductance and capacitance will affect your results. For S21 measurements I use a test board like the one below. You can buy NanoVNA
By Roger Need · #29667 ·
Re: 2 poles filters teminaison impedance
Hello, The filter is given as equivalent to a 45M15A. The characteristics give a termination of 4Kohm and 2.5 PF. I also found a more traditional test method to see.
By Gerard · #29666 ·
Re: 2 poles filters teminaison impedance
Another method used by Epson to measure MCF devices is to use matching transformers to perform the 50 ohm to Zt transformation. https://www5.epsondevice.com/en/information/technical_info/filter/ This
By Roger Need · #29665 ·
Re: 2 poles filters teminaison impedance
Yes you have the correct procedure. Below is the test setup used by a Monolithic Crystal Filter (MCF) vendor using series resistors and a shunt capacitor to get the required termination impedance..
By Roger Need · #29664 ·
NanoVNA-h4 stuck in DFU mode
My NanoVNA-H4 is stuck in DFU mode. when i try to use the DFuse.exe it does not see the device connected to the computer. when i go into device management i see the STM32 Bootloader listed under USB
By Eric KO4ZEK · #29663 ·
Re: 2 poles filters teminaison impedance
Hello, Good morning, Very interesting article. I did a translation in French. Now tell me if I¡¯m wrong about the measurement method. 1) We calibrate the NanoVna and then we measure the filter, we
By Gerard · #29662 ·