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Re: 2022 membercount reaches 166
Very good, will keep an eye out. I have writte a few cookbook type guides for other ham equipment and siftware, will give some thought to finding something I couls offer here. Really like my VA5. My
By Wes WB7BR · #189 ·
Re: 2022 membercount reaches 166
Hello Wes, Thanks for the suggestion. I had a look and it seems to have all we need. I'll make a start soon. 73 Dieter, VK3FFB
By Dieter VK3FFB · #188 ·
Re: 2022 membercount reaches 166
With regard to guide documents, the Wiki folder on this web site is actually designed for just this purpose. Might be the way to go. -- VY 73, Wes AE6ZM
By Wes WB7BR · #187 ·
2022 membercount reaches 166
Best wishes for 2022 to all group members. I am pleased to announce that we now have 166 group members. While the group activity remains relatively low, all question from FA-VA5 users are answered
By Dieter VK3FFB · #186 ·
Re: FA-VA5
Just dawned on me that this may be related to the actual device display rather than the software display. Right ?? Have to admit that I have never used the device display. Need to expand my horizons
By Mike / W8DN · #184 ·
Re: FA-VA5
Ok, now I understand and would automatically assume + to the right. However, that brings another question - why or when would such a scale be appropriate or useful. I would think a linear frequency
By Mike / W8DN · #183 ·
Re: FA-VA5
Hello Mike The question was related to the frequency axis of a VSWR graph on the FA-VA5. If we have a "delta-f axis" with the sweep defined as fc +/- delta-f then the axis shows negative delta-f
By Dieter VK3FFB · #182 ·
Re: FA-VA5
Sorry but just gotta ask - what is + or - when related to Single sweep SWR ?? Never heard of a negative SWR. Mike / W8DN
By Mike / W8DN · #181 ·
Re: FA-VA5
Ken's question was answered by direct e-mails. Otherwise, pages 15-17 of the FA-VA5 manual are relevant. regards Dieter, VK3FFB
By Dieter VK3FFB · #180 ·
FA-VA5
Under SWR Single sweep, based on this practically useless manual, how do you tell which side is plus (+) and which is minus (-)??? Thanks.....Ken
By Ken W2GIW · #179 ·
Re: Tutorial for Old Hams without electrical engineering Experiences....
Thanks for the informations, I will dig into it. Val N4RJ
By Val N4RJ · #178 ·
Re: Tutorial for Old Hams without electrical engineering Experiences....
generally applicable video: https://youtu.be/1FdXifnWrLE if you permanently attach a 50 ohm load to the nanoVNA's second port (CH1, S21), then what you have is roughly equivalent to the FA-VA5.
By Chris KB3CS · #177 ·
Re: Tutorial for Old Hams without electrical engineering Experiences....
Hello Val thanks for your message. So far, I have found out that it is indeed possible to make TDR measurements in conjunction with the DG8SAQ VNWA software. The best way to get you going is perhaps
By Dieter VK3FFB · #176 ·
Re: Tutorial for Old Hams without electrical engineering Experiences....
As a start, since it seems the trouble you are having is with the VNWA software you might take a look over at the VNWA group on Groups.io. -- VY 73, Wes AE6ZM
By Wes WB7BR · #175 ·
Re: Tutorial for Old Hams without electrical engineering Experiences....
Val, this group is alive, but not really active. Your request for a how-to cookbook for TDR measurements is a pretty large request. Like you, many of us have lots of time, but not so much energy. I
By Wes WB7BR · #174 ·
Re: Tutorial for Old Hams without electrical engineering Experiences....
Am I too far gone for Help? Or, is anyone using this thread? Still lost in the Ozone down here. Thanks Val N4RJ
By Val N4RJ · #173 ·
Antenna impedance measurements with the FA-VA5
Dear FA-VA5 users, For those of you who may not be so familiar with antenna impedance measurements, here are some points to consider: * If a reasonably *well-matched antenna?is measured via a long
By Dieter VK3FFB · #172 ·
Tutorial for Old Hams without electrical engineering Experiences....
This is my first post. I am Old.? Licensed for 65 years so my "New Skill" learnin' ain't what it used to be. I have a FA-VA5. I want to use it to do TDR. I need a 1,2,3,4 Cookbook to set it up if
By Val N4RJ · #171 ·
Old Ham needs Help with TDR setup
Hi, I have a FA-VA5 but don't know how to use it for TDR. I am not an EE and just plodding along with half a brain and a lot of Trial and Error. Can someone cook Book a 1,2,3,4,etc list of things to
By Val N4RJ · #170 ·
Re: Measuring low/high/band pass filters #fa-va5
Hi Magne The idea is not bad and it is in fact widely used in so-called filter synthesis. The only crux is that it works only with lossless networks (Q = infinity). When we have a lossy filter, we can
By Dieter VK3FFB · #169 ·