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Re: Estimating coaxial cable length - using TDR
I got a break from TDR by seeing "Swan Lake" , enjoyed the music , not sure about the ballet. My XYL comment was "woman body legs are not attached to the body..." BTW the antenna "mast" fell in recent
By Anne Ranch <anneranch2442@...> · #33078 ·
Re: Anybody happens to know VF of this cable ?
Thanks, all reposes are greatly appreciated. 73 Vaclav AA7EJ
By Anne Ranch <anneranch2442@...> · #33077 ·
Re: When I connect NanoVNA Saa-2N to the USB-port
The USB-C port on the NanoVNA systems is reported to be rudimentary, and not capable of properly negotiating the voltage it wants. 5 Volts is expected. Use a USB-A to USB-C cable and this won't
By Rick Murphy · #33076 ·
Locked Subject Lines in Posts
Please do not put the text of your post in the Subject line. The Subject line should refer to the general topic about which the post is intended. Some recent posts have had ridiculously long subject
By Dave Daniel · #33075 ·
Re: When I connect NanoVNA Saa-2N to the USB-port
https://photos.app.goo.gl/wKBvKLX6d8kE4AWX8 s?n. 11. juni 2023 kl. 14:27 skrev Oddleiv Tungland <oddleiv@...>:
By Oddleiv Tungland - LA3GW · #33074 ·
When I connect NanoVNA Saa-2N to the USB-port
the display starts to flicker. -Oddleiv
By Oddleiv Tungland - LA3GW · #33073 ·
Re: Nanovna or antenna analyzer? #buying #newbie
H / H4 / LiteVNA allow install Bluetooth or WiFi to serial module (deivices have internal serial connection pins) for use wireless connect. I test bluetooth HC-05, HC-06 moduless (maximum speed depend
By DiSlord · #33072 ·
Re: Nanovna or antenna analyzer? #buying #newbie
A few years ago, before the nanovna, I bought the MINI60 version of the Sark. It's very small, it sweeps the band you choose, shows the frequency of minimum SWR but you can also read each measurement
By DougVL · #33071 ·
Re: Anybody happens to know VF of this cable ?
https://web.archive.org/web/20061024074651/http://www.eagleaspen.com/products/links/39B2.pdf foam, 82% VF
By Jim Lux · #33070 ·
Re: Anybody happens to know VF of this cable ?
The wayback machine has it. https://web.archive.org/web/20060822025816/http://www.eagleaspen.com/products/products_1.php?id=51 The 39B2 link below the text leads to a PDF. 73 -Jim NU0C "Anne Ranch"
By Jim Shorney · #33069 ·
Re: Anybody happens to know VF of this cable ?
You might be able to figure it out from the 18 AWG (which is the diameter of the center conductor). The Z depends on the ratio of inner to outer diameter AND the epsilon of the dielectric. OTOH, who's
By Jim Lux · #33068 ·
Re: Anybody happens to know VF of this cable ?
How long is it? Can you measure how long it is, then use the nano to see how long "Electrically" it is, and there ya go you got it's VF. Joe WB9SBD . A Contest 40 Years in The Making!
By Joe WB9SBD · #33067 ·
Re: Anybody happens to know VF of this cable ?
It is foam dielectric with VF of 82% Roger
By Roger Need · #33066 ·
Re: Anybody happens to know VF of this cable ?
I am not sure I have another scrap cable I can take apart, This one has been given to me and I do not have same crimp connector to cut / restore it.
By Anne Ranch <anneranch2442@...> · #33065 ·
Re: Anybody happens to know VF of this cable ?
Is there any way to tell if the dielectric is PE or foam? 73, Joseph W6JHP
By w6jhp · #33064 ·
Anybody happens to know VF of this cable ?
I did ask Mts Goggle and got no (real) answer Here is the label on the cable Eagle Aspen 39B2 RG-6 2.25 GHz Digital Coaxial Cable, 6FT, Black, High Performance 2.25 GHz CMX 18AWG 75¡ãC UL E227171
By Anne Ranch <anneranch2442@...> · #33063 ·
Re: Nanovna or antenna analyzer? #buying #newbie
Sigi: Did you write anything up or have pictures of your Bluetooth add-on. I¡¯d like to give it a try. Thanks Ed McCann AG6CX
By AG6CX · #33062 ·
Re: Estimating coaxial cable length - using TDR
The open/short/load just makes sure the reflection measurement is correct. It has nothing to do with the actual measurement of a feedline. The reason you can "see" connectors and the antenna in the
By Jim Lux · #33061 ·
Re: Estimating coaxial cable length - using TDR
The Keysight Ap Note is a good reference. For what it's worth, in the older NanoVNA-Saver version I have, there are some problems in the implementation, specifically because it does not deal with the
By Jim Lux · #33060 ·
Re: Estimating coaxial cable length - using TDR
Jim Lux, as always, your replies are clearing few of mine misconceptions, thanks. With all this FFT (frequency to pulse and time ) it is still unclear how CHANGING the "sweep" changes the "estimated
By Anne Ranch <anneranch2442@...> · #33059 ·