Re: Measure Inductance?
InfoAge did accept my Radio and Electronic Data Books, Equipment Manuals and Electronic perodicals. I donated it in the spring of this year. The person I worked with is Ray Chase. Is business card
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Mike N2MS
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#30156
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Re: Measure Inductance?
Not InfoAge but more likely The Vintage Computer Federation (VCF - museum) or NJARC (Antique Radio museum). I don't think we (Computer Deconstruction Lab - CDL - Makerspace) got them. InfoAge manages
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Neil Cherry <ncherry@...>
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#30155
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Re: How to use my NanoVNA-H4 to test resonant frequency of a tower?
In the 70's I worked at a transmitting station that had about 10 three wire 2 to 30 MHz "rhombic" field antennae fed with 600 ohm open wire feeders.On a whim one day I backed up my Celica fitted with
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Deane Mundy
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#30154
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Re: How to use my NanoVNA-H4 to test resonant frequency of a tower?
I don't know that you want to wrap the coils *around* the tower. You want them magnetically coupled - which is sort of challenging, since you'd normally have a magnetic core, the tower is "one turn",
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Jim Lux
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#30153
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Re: How to use my NanoVNA-H4 to test resonant frequency of a tower?
Jim Allyn, I don't have a tower to test this idea. I read the Notes on measuring tower resonances that you posted where Rudy couples to the tower with a rectangular loop. What if a number of insulated
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WB2UAQ
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#30152
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Re: Firmware Differences
Hi Tom, Nice job. 73...Bob VK2ZRE
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Bob Ecclestone VK2ZRE
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#30151
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Re: NanoVNA Saver - Display Smith Cart
Thanks Stan, I won't be so impatient on start up.
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david.reed346@...
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#30150
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Re: NanoVNA Saver - Display Smith Cart
It starts that way, and in some installations can take a very long time (two or three minutes or more the first time) as it unpacks and loads all of the necessary python environment (amd perhaps it
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Stan Dye
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#30149
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Re: NanoVNA Saver - Display Smith Cart
I would add to the question about saver. I only get a command line box when I download from nanoVNA saver to windows 11. Where can I find info about getting the program to work? Dave, AC0YW
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david.reed346@...
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#30148
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Re: Micro SD Card Issue
Hugen, I replaced R93 with a short and that fixed the problem. Thank you, Tom? W0IVJ
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Tom Thompson W0IVJ
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#30147
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Re: Micro SD Card Issue
Thanks, Hugen, Attached are two pictures of the area.? The board that does not write has a lot more circuitry around the SD card slot than the board that does write.? Should I just place a ferrite
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Tom Thompson W0IVJ
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#30146
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Re: NanoVNA Saver - Display Smith Cart
I updated. It works, Thanks
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Charlie N2MHS <ucfargis1@...>
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#30145
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Re: NanoVNA Saver - Display Smith Cart
Charlie, all versions of nanovna-saver (that I am aware of) can show a Smith Chart. It just needs to be selected using the "Display setup..." button at the bottom left of the main screen. Near the
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Stan Dye
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#30144
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Re: NanoVNA Saver - Display Smith Cart
What version do you have and where did it come from?Mine does not show this.
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Charlie N2MHS <ucfargis1@...>
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#30143
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Re: Micro SD Card Issue
On Sat, Oct 29, 2022 at 12:12 AM, Tom Thompson W0IVJ wrote:
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Hugen
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#30142
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Re: Firmware Differences
Thanks Lester B Veenstra K1YCM M?YCM W8YCM 6Y6Y W8YCM/6Y 6Y8LV (REformed CTM1) lester@... 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N 78.982287 W (Google) GPS:
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Lester Veenstra
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#30141
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Re: Firmware Differences
DiSlord did just that in an attachment earlier in this thread. I attach it again here for your convenience: [email protected]> wrote:
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Stan Dye
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#30140
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Re: Firmware Differences
May I suggest (Because I am too lazy) That someone volunteer to lay out the tansformation formula from Smith Chart to real values: Smith Rm to normalized Real to actual resistance Smith Im to
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Lester Veenstra
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#30139
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Micro SD Card Issue
My NanoVNA-H4, HW version4.3_MS from SeeSii, gives a write error when writing to the SD Card. My NanoVNA-H4, HW version 4.2 from R&L Electronics, writes perfectly to the SD card. Both are running
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Tom Thompson W0IVJ
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#30138
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Re: Firmware Differences
Hi Bob, You are correct about the type of resistors to use for measurements.? I mostly use BNC cables and devices, so I have built cal standards and measurement standards using BNC connectors as
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Tom Thompson W0IVJ
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#30137
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