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Re: Am I in the right track ?
Nico, After reviewing the data sheet that you posted earlier I see that Linx does offer customer support for this antenna. They state that they can supply PCB layout files and recommend matching
By Roger Need · #39804 ·
Re: Erratic traces with SAA2N
This is what it looks like when I reset the calibration.
By K3IY · #39803 ·
Re: Erratic traces with SAA2N
Can you send an uncalibrated image?
By Hugen · #39802 ·
Re: Erratic traces with SAA2N
I confirmed that short/open/load standards are measuring as they should at the terminals on the pcb board.
By K3IY · #39801 ·
Re: Erratic traces with SAA2N
I bought the unit from R&L on Oct. 31, 2024. I did an ohm reading between blocking capacitor on the circuit side CH0 port terminal and ground, as described in this blog post
By K3IY · #39800 ·
Re: Erratic traces with SAA2N
If you buy from RANDL, we can provide you with after-sales service. But since we have discontinued the SAA2N for a long time, RANDL may not have the stock to replace it for you. This is usually caused
By Hugen · #39799 ·
Re: Erratic traces with SAA2N
The make up is one thing were the clones come in is the software and firmware that you cant make work or upgrade. ________________________________ Sent: Sunday, March 16, 2025 6:29 PM To:
By CLIFTON HEAD · #39798 ·
Re: Erratic traces with SAA2N
they claim ALL (except their own) as clones ... but they are all "brothers and sisters", cousins ..? ... etc etc they all are made quite similar in circuit design dg9bfc sigi Am 15.03.2025 um
By Siegfried Jackstien · #39797 ·
Re: .NanoVNA-H v3.5_L: white screen - how do I connect USB to fix?
maybe the case is pressing on the touch screen? ... or the screen cable is not well fitted did you try to connect it to pc (example nanovna app)?? dg9bfc sigi Am 16.03.2025 um 23:31 schrieb
By Siegfried Jackstien · #39796 ·
Re: .NanoVNA-H v3.5_L: white screen - how do I connect USB to fix?
Sorry, it is indeed -H; but not '4' I'll try with differeny connection - thanks!
By Taracait · #39795 ·
Re: .NanoVNA-H v3.5_L: white screen - how do I connect USB to fix?
Battery is fine, 3.7VDC; checked at the unit PCB. And the screen is lighting up (white), so power isw not the problem
By Taracait · #39794 ·
Re: Am I in the right track ?
If I get you correctly, that is the "skin" current that gets radiated from the antenna as pure RF ? If so, that remaining common mode current is reflected back at the source and then "recombine" at
By W0LEV · #39793 ·
Re: Am I in the right track ?
@Roger And @Dave, If I get you correctly, that is the "skin" current that gets radiated from the antenna as pure RF ? If so, that remaining common mode current is reflected back at the source and
By Nico · #39792 ·
Re: S-Parameter Plotter
This will download the updated S-parameter plotting program: https://tinyurl.com/bd8fde5t I was surprised to discover that the final Touchstone 1.1 file specification provides for multiple,
By Brian Beezley · #39791 ·
Re: S-Parameter Plotter
Thanks Brian, That link worked OK 73, Geoff
By gmendenh1947 · #39789 ·
Re: S-Parameter Plotter
I seem to have gotten everything working. The plots show a 280 kHz Murata ceramic filter with an 82 pF load on its output. The dB and group delay curves are similar to those published by Murata for a
By Brian Beezley · #39788 ·
Re: Am I in the right track ?
When you use a coaxial cable the RF current goes up and down the center conductor and the inner surface of the coax shield. The reason I say inner shield is that due to the "skin effect" the RF
By W0LEV · #39787 ·
Re: .NanoVNA-H v3.5_L: white screen - how do I connect USB to fix?
ST-LINK info: /g/nanovna-users/topic/nanovna_bricked/34149616 wrote:
By Richard Jamsek · #39786 ·
Re: S-Parameter Plotter
Geoff, this will download the program and documentation: https://tinyurl.com/bd8fde5t Brian
By Brian Beezley · #39785 ·
Re: S-Parameter Plotter
Brian, When I go to this link: http://ham-radio.com/k6sti/mu.htm I get the message that ham-radio.com domain has expired. Is the above link you posted correct. 73, Geoff - W8GNM
By gmendenh1947 · #39784 ·