[bars] Fw: Notes from ARRL VHF contest

Sat Jun 17 12:23:26 EDT 2023

Thanks, guys. I don't yet understand how I would use this over and above
the functionality of my autotuner, which if I believe what it is saying, it
is matching SWR down to very close to 1.

73,
KC1SOZ
Juan

On Sat, Jun 17, 2023 at 8:11 AM Nori Kajita <nkajita at outlook.com> wrote:

> At this point, I just using for SWR only, so I don't use for other purpose
> yet. Nano VNA has many other functions. people using for tune own filter,
> you can check cable loss, cable length and may others.
>
> I have attached a capture of the result of a simple experiment with 6M
> antenna. My Nano VNA setting is yellow line is indicating SWA, green -
> Smith chart, The blue line - impedance (resistance), and the purple line -
> reactance. The band width of these images between 49.5MHz - 51.0MHz ( You
> can change this setting as you want ). The antenna is 1λ, so I used
> little more than 6m speaker cable. I made a loop using a paracord with four
> rings with knots the cable thru those rings, The top and bottom are about
> 41" width, and height is about 79". It's looks not bad as is (left side)
> but the lowest SWR is slightly high. If I want to make lowest peak lower, it
> can be changing add length, or change the ratio of loop or maybe others. If
> just focus the lowest part of SWR (1.0), I could change from 50.520MHz
> (left) to 50.310MHz (right) by changing ratio, which I used for 6m FT8
> (50.313MHz). The impedance (blue line) about flat, but right side one
> shows slightly low (49.27Ω vs. 48.4Ω), if I want to closer to 50Ω, I
> maybe add width to get more closer to 50Ω, etc. I don't know other
> antenna analyzer, but at least Nano VNA, you can see where it changes in
> real time, I thought this step was fun part for me.
>
> 73,
> Nori - AA1NK
> ------------------------------
> *From:* KC1SOZ <kc1soz at bd5.com>
> *Sent:* Saturday, June 17, 2023 0:48
> *To:* Nori Kajita <nkajita at outlook.com>
> *Cc:* BARS Reflector <BARS at w1hh.org>
> *Subject:* Re: [bars] Fw: Notes from ARRL VHF contest
>
> How do you use the analyzer? I already have SWR info on mine, what does
> this add to the little pile of data? I mean, I understand the concepts, I
> was maintaining avionics and electrical systems on Marine aircraft starting
> back in 1979, and our helos had HF, VHF and other equipment on it, but the
> maintenance did not include deeper analysis for maintenance and repair,
> which was done at the depot level.  :)
>
> 73,
> KC1SOZ
> Juan
>
>
> On Thu, Jun 15, 2023 at 10:52 PM Nori Kajita <nkajita at outlook.com> wrote:
>
> It's works fine for me. The thing is this first one and only one I ever
> used, so I cannot compare with the other one. It's because of much less
> expensive than RigExpert or MFJ's antenna analyzer, many new ham like me
> using this unit. You can find many info at YouTube. If you want to see
> this, I can bring it to Field day.
>
> 73,
> AA1NK Nori
> ------------------------------
> *From:* KC1SOZ <kc1soz at bd5.com>
> *Sent:* Friday, June 16, 2023 0:14
> *To:* Nori Kajita <nkajita at outlook.com>
> *Cc:* BARS Reflector <BARS at w1hh.org>
> *Subject:* Re: [bars] Fw: Notes from ARRL VHF contest
>
> How's that antenna analyzer working for you? Do you like it?
>
> 73,
> KC1SOZ
> Juan
>
>
> On Thu, Jun 15, 2023 at 7:51 PM Nori Kajita <nkajita at outlook.com> wrote:
>
> I haven't got the hang of this mailing list yet, and I habitually just
> replied to email. I forward my reply to Joanne just in case.
>
> 73,
> Nori
>
>
>
> ------------------------------
> *From:* Nori Kajita <nkajita at outlook.com>
> *Sent:* Wednesday, June 14, 2023 23:53
> *To:* Joanne Dolan <dolans.family at gmail.com>
> *Subject:* Re: [bars] Notes from ARRL VHF contest
>
> Hi Joanne,
>
> That is Nano VNA, I am using for antenna analyzer. I attached the photos
> of the unit and result of my 6m antenna.
> 73,
> Nori
> ------------------------------
> *From:* Joanne Dolan <dolans.family at gmail.com>
> *Sent:* Wednesday, June 14, 2023 13:17
> *To:* Nori Kajita <nkajita at outlook.com>
> *Cc:* BARS Reflector <bars at w1hh.org>
> *Subject:* Re: [bars] Notes from ARRL VHF contest
>
> Nori, what’s the unit on the stool?
> Tim, can you send a picture of your antenna setup?
> Thank you both for sharing!
> 73,
> Joanne
> KC1NMX
>
> Sent from my iPad
>
> On Jun 13, 2023, at 9:49 PM, Nori Kajita <nkajita at outlook.com> wrote:
>
> 
> Tim,
>
> Thank you for your report and summary. I enjoyed it as well. I planned to
> make a home drew antenna for 6M. But unfortunately, Glassfiber fishing rod
> I planned to use as pole did not come on time, so I just use paracord and
> speaker wire and make kind of 1 λ loop antenna. I attach a photo of antenna
> how I set up. I set up this antenna on my deck which is only 9 feet from
> ground. It's very simple but the antenna works just fine and able to QSO to
> one of west coast station with FT8. I never work other than FT8 yet on 6M,
> so I will try other mode as well on September!
>
> 73,
> Nori - AA1NK
> ------------------------------
> *From:* bars <bars-bounces at w1hh.org> on behalf of Tim KC1RET <
> kc1ret.radio at gmail.com>
> *Sent:* Tuesday, June 13, 2023 12:16
> *To:* w1hh <bars at w1hh.org>
> *Subject:* [bars] Notes from ARRL VHF contest
>
> My station is solidly in the 'little pistol' category. I have a 4el 6M +
> 11el 2M + rotor mounted on top of a 10 foot pole mast on my deck. I manage
> about 100W on 6M and only 50 on 2. It was also my first attempt at SO2R and
> it was a bit bumpy. I did find it valuable to monitor two bands at the
> same time, but my software setup (N1MM + JTAlert) isn't 100% yet.
> I was only able to operate on Sunday for about 12hrs so my score is quite
> modest. I heard very little in the way of SSB here - I only managed a
> handful of phone contacts. FT8 was the most productive for me, by far. I
> managed ~90 Qs in over 30 grids. My highlight QSO was W1FET/MM in FL66.
> Lessons for next time:
> - Sort out the software! I duped several stations because N1MM wasn't
> getting the call from WSJT-X. It did log it fine, just didn't populate the
> active call window and therefore didn't show dupes correctly.
> - Remember to check the FM segments
> - Pay more attention to the spots.
> - Finish the build of 2 & 6M LNAs.
> - Add 432 (222?) to the mix.
> I did enjoy it very much -- I look forward to improving for September!
> --
>
> Courageously sent from a non-Apple device that *includes* a headphone
> jack.
> ------------------------------
> <https://kc1ret.com/img/kc1ret-qsl-card-front-v3.png> Tim Carter - KC1RET
>
> +1.978.710.0133 <1.978.710.0133>
> kc1ret.radio at gmail.com
> https://kc1ret.com
>
> "Computers are incredibly fast, accurate and stupid; humans are incredibly
> slow, inaccurate and brilliant; together they are powerful beyond
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>
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> <loop antenna.jpg>
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