[TowerTalk] Measuring resonance of a yagi element

[David Gilbert]

For anyone who doesn't have an analyzer and may have missed some of the 
earlier posts here about the NanoVNA, it is an amazing vector network 
analyzer for less than $50.   There are people who have compared it to 
lab grade HP analyzers and found the accuracy to be within a percent or 
so up to 300 MHz.  It will display the results in Smith Chart form, as 
an S-parameter, or as a vector impedance (R +/- jX).  It is capable of 
both single port and two port analysis, and it even comes with it's own 
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.

It's physically quite small, though, so take that into account if your 
eyes aren't great.  At least the LCD contrast is decent.

73,
Dave   AB7E



On 4/21/2020 8:28 PM, jimlux wrote:
> On 4/21/20 7:04 PM, Robert Harmon wrote:
>> I new there was a reason to keep my old Millen grid dip meter  !
>>
>> Bob
>> K6UJ
>
> MFJ actually sells coils that hook on the 269 analyzer. They do in 
> fact work, but I think you can do as well with a connector and a 
> single wire loop. a cliplead works.