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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+FA\-VA5\s+question\s*$/: 15 ]

Total 15 documents matching your query.

1. [TowerTalk] FA-VA5 question (score: 1)
Author: Dave Sublette <k4to.dave@gmail.com>
Date: Fri, 5 Nov 2021 12:35:58 -0400
I have one of these which I use to check SWR and measure component values. I love it. I know it is capable of doing more. I just haven't had a need to use it any other way. What I am wondering is, wi
/archives//html/Towertalk/2021-11/msg00014.html (7,970 bytes)

2. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: "Lux, Jim" <jim@luxfamily.com>
Date: Fri, 5 Nov 2021 09:51:58 -0700
On 11/5/21 9:35 AM, Dave Sublette wrote: I have one of these which I use to check SWR and measure component values. I love it. I know it is capable of doing more. I just haven't had a need to use it
/archives//html/Towertalk/2021-11/msg00015.html (9,109 bytes)

3. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: Wes <wes_n7ws@triconet.org>
Date: Fri, 5 Nov 2021 10:21:00 -0700
Since you don't want to read any manuals, this is probably a moot point, but the VNWA software has TDR provisions.  Whether you can get enough data out of the FA-VA5 or not isn't clear to me without
/archives//html/Towertalk/2021-11/msg00016.html (8,375 bytes)

4. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Fri, 5 Nov 2021 11:17:43 -0700
TDR can be accomplished by using DG8SAQ's VNWA software on the exported file. Perform the widest possible sweep, save the file per the manual, and import in that software. 73, Jim K9YC ______________
/archives//html/Towertalk/2021-11/msg00017.html (7,824 bytes)

5. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: <john@kk9a.com>
Date: Fri, 5 Nov 2021 15:46:49 -0400
That is a very odd problem for a single piece of Heliax. Are you sure that the connectors are good. If the cable is in PVC pipe I would yank it out and replace it with something better for outdoor us
/archives//html/Towertalk/2021-11/msg00018.html (7,787 bytes)

6. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Fri, 5 Nov 2021 12:47:54 -0700
That works, but if the problem is approximately short or an open, there is an easier way to achieve a kind of manual TDR: 1.  Take readings with the FA-VA5 at three different frequencies chosen to re
/archives//html/Towertalk/2021-11/msg00019.html (9,792 bytes)

7. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Sat, 6 Nov 2021 07:30:15 -0700
You can save raw impedance data to memory on the FA-VA5 while using it standalone in the field and then download it later to the VNWA software. The one frustrating limitation of using the unit standa
/archives//html/Towertalk/2021-11/msg00020.html (11,330 bytes)

8. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Sat, 6 Nov 2021 07:35:48 -0700
I just watched a video by W0QE from 2019 that indicated that the NanoVNA doesn't allow you to save data to memory while using the unit standalone. Do you know if that limitation has been remedied in
/archives//html/Towertalk/2021-11/msg00021.html (8,468 bytes)

9. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: "Lux, Jim" <jim@luxfamily.com>
Date: Sat, 6 Nov 2021 07:42:34 -0700
On 11/6/21 7:30 AM, Michael Tope wrote: You can save raw impedance data to memory on the FA-VA5 while using it standalone in the field and then download it later to the VNWA software. The one frustra
/archives//html/Towertalk/2021-11/msg00022.html (9,524 bytes)

10. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: "Lux, Jim" <jim@luxfamily.com>
Date: Sat, 6 Nov 2021 07:46:29 -0700
73, Mike W4EF.............. yes. some of the newer versions have an SD card. Some of the older ones have the solder pads for the SD card holder, but no actual SD card socket. Ditto serial port.  The
/archives//html/Towertalk/2021-11/msg00023.html (9,276 bytes)

11. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Sat, 6 Nov 2021 13:01:52 -0700
Looking for a single hard fault the FA-VA5, you can look at the coarse frequency response first, and them zoom in on the exact frequency of each of the consecutive opens (or shorts) separately using
/archives//html/Towertalk/2021-11/msg00024.html (11,111 bytes)

12. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Sat, 6 Nov 2021 13:11:46 -0700
That's good to know. I would consider not being able to save stuff a major shortcoming. If you want to make sure your beam is working in a rough go/no-go kind of way (like in a field day scenario), i
/archives//html/Towertalk/2021-11/msg00025.html (10,929 bytes)

13. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Sat, 6 Nov 2021 13:12:11 -0700
Dave, Send me the FA-VA5 complex impedance measurements for these three frequencies taken from each end of the line (six readings): 5 MHz, 10 Mhz, 15 MHz If I can't determine where the faults are wit
/archives//html/Towertalk/2021-11/msg00026.html (10,193 bytes)

14. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: Dave Sublette <k4to.dave@gmail.com>
Date: Sat, 6 Nov 2021 16:15:40 -0400
Thanks to all. I will take the three frequency data and send it to Dave (Thanks!) I have been driving all day and I need to take a nap. I will get to it soon. I promise. Thanks again, Dave, K4TO ____
/archives//html/Towertalk/2021-11/msg00027.html (11,380 bytes)

15. Re: [TowerTalk] FA-VA5 question (score: 1)
Author: Ignacy Misztal <no9e@arrl.net>
Date: Mon, 8 Nov 2021 13:12:47 -0500
If someone can afford the new RigExpert analyzer, the question will be gone. I have many analyzers: cheap nanoVNA, expensive VWNA3E, accurate FA-VA4.... But my first tool to use is RigExpert, before
/archives//html/Towertalk/2021-11/msg00029.html (8,752 bytes)

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