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Re: [TowerTalk] Measuring resonance of a yagi element

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Measuring resonance of a yagi element
From: David Gilbert <xdavid@cis-broadband.com>
Date: Tue, 21 Apr 2020 22:13:00 -0700
List-post: <mailto:towertalk@contesting.com>

It has been a while since I kept up to date on it, but this link shows what I believe to be the safest bet to get the right version of the model I was referring to.  Amazon also has several offerings, most at higher prices, and even I can't tell for sure how valid some of the listings are.  In general, you want the unit with a 3.4 inch display, a 650 mah battery, and internal metal shielding.  In the past some knockoff units didn't have the shielding, had crappy soldering, and even came without the battery.  The Hugen one via the link below has always been a reliable source and will also have the latest firmware installed.

https://www.alibaba.com/product-detail/3-4-version-650mAh-battery-Original_62342877955.html?fullFirstScreen=true

The only problem is that some folks have had difficulty getting their credit card company to accept payments to Alibaba.  In those situations, this link will get you in contact with Maggie King who can set up a transaction via PayPal.

*https://tinyurl.com/y9xpssnc *(it was a very long URL)

By the way, if I remember correctly, the original NanoVNA was designed by a Japanese fellow, but Hugen upgraded the design and made it widely available with good manufacturing quality.

That's the best I can do, I'm afraid.  There is a very active groups.io forum on the NanoVNA with LOTS of information, as well as updated files for both the firmware and some freeware software to operate the NanoVNA from a computer that adds some very nice additional features.  The forum was so active that I had to mute the regular emails because I was getting so many of them.

73,
Dave  AB7E




On 4/21/2020 9:12 PM, Richard (Rick) Karlquist wrote:


On 4/21/2020 8:48 PM, David Gilbert wrote:

calibration units.  There are lots of inferior copies, though, so do a bit of research to find out which ones are the real deal.  They can be found on both eBay and Amazon.

Dave   AB7E


So how are we supposed to determine the "genuine" ones?

Rick N6RK
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