Re: RF Active Probe
That probe might be useful for use with the spectrum analyzer to provide a means to probe some high-z circuits without loading them down with the 50 ohms presented by the SA input, but I think it
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Ray Anderson
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#24046
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RF Active Probe
For those looking for a probe for the NanoVNA or Tiny SA you might check out the following. It has a dc block and should work fine. I bought but haven't tried them yet. It's cheap enough it won't hurt
By
avvidclif
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#24045
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Re: SMA connector pulled off of cable.
Those are unobtanium around these parts so I have to get what's available at Ali, Ebay etc. Anyway I prefer PTFE coax and soldered connectors. RG316DS would be best (for me) but can't find non fake
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Dragan Milivojevic
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#24044
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Re: SMA connector pulled off of cable.
OK lets run this off the cliff. If you have a propensity to build your own cables I would suggest LMR195 ultraflex cable. This is the same size and very similar characteristics as RG142but is much
By
Clyde Spencer
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#24043
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Re: SMA connector pulled off of cable.
Get some semi rigid cables, the shield is soldered to the connector shell so it won't come off any time soon. RG402 is the thicker and stiffer variant, RG405 is the thinner, more flexible one. I got
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Dragan Milivojevic
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#24042
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Re: SMA connector pulled off of cable.
VNA cables need to be considered as consumables, they will eventually break or the connectors become worn. There are many sources of flexible cables online, Amazon and EBay have many. There is nothing
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Donald S Brant Jr
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#24041
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Re: SMA connector pulled off of cable.
Save the broken cable. Maybe you can use it when building a test fixture or similar. *Clyde K. Spencer* [email protected]> wrote:
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Clyde Spencer
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#24040
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Re: SMA connector pulled off of cable.
I would no longer trust that cable. You can get a pair of these cables from Amazon.com or other sources. The screen shot below is from Amazon.com [image: image.png] *Clyde K. Spencer*
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Clyde Spencer
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#24039
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SMA connector pulled off of cable.
This past weekend, I accidentally pulled the SMA connector off one of the thin coaxial cables. The outer threaded portion came off, but the center pinwas still attached. The cable checks out, or at
By
Bill Klymus W5PB
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#24038
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Re: danger measuring antenna
Yes, it was also something for the final DC block from the 6146 plate voltage to work against. Dave - W?LEV g3vgz-groups.io@...> wrote: -- *Dave - W?LEV* *Just Let Darwin Work*
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W0LEV
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#24037
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Re: danger measuring antenna
"David Eckhardt" <davearea51a@...> wrote: Manly to prevent dangerous voltages on the feedline due to breakdown in the plate capacitor leaking HT onto the feedline, essential on high power valve
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Brian D
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#24036
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Re: help with driver issue for a newbie
Hi Vladimir, Larry, and Group: Thanks so much for your advice. The references that you sent basically go in the direction of using the Cypress driver. I tried this, but to no avail - also get similar
By
Ray
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#24035
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Re: Mosley traps measurements question
Search the group for "traps". Several posts on this topic. Roger
By
Roger Need
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#24034
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Mosley traps measurements question
I wondered if anyone has measured Mosley traps with the NanoVNA? I have one on order. Currently I used a MFJ259c to try to get some results. I took the trap apart and put a 50 pica farad in series to
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K8HTB
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#24033
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Re: help with driver issue for a newbie
Dear Vladimir, Thank you for your suggestion. I will look into it today. 73 Ray 4X1RB From the home of Prof. Emeritus Raymond (Reuven) Boxman School of Electrical Engineering Tel Aviv University Cell:
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Ray
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#24032
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Re: Download NanaoVNA Labview
I have a lot of respect for the gentleman in question. He must be independently wealthy as he seemingly tests every multimeter in existence and then posts the results of his testing for FREE. I have
By
Lawrance A. Schneider
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#24031
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Re: V2 SD card firmware
Hi DiSlord, numbering instead of random "RTC" naming is a great idea, but I understand it may not be easy to implement, need to add reading files and "logic". An updated fw v1.0.69 from 31.7 with
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Anton
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#24030
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Re: help with driver issue for a newbie
Thanks for the suggestion! I will investigate it later today.... Ray From the home of Prof. Emeritus Raymond (Reuven) Boxman School of Electrical Engineering Tel Aviv University Cell: ???? +972
By
Ray
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#24029
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Re: Where does this noise/instability come from at and around 300MHz?
Just wondering if you hit the parts you're testing with a heat gun and/or freezing spray to see how how well the consumer level parts react.
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Larry Rothman
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#24028
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Re: V2 SD card firmware
DiSlord, For the V2 Plus units with no RTC, can the SDcard filenames be read and the next file saved has its last character incremented by one? This assumes a fully numeric filename so there are no
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Larry Rothman
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#24027
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