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Re: [TowerTalk] impedance meter recommendations pse

Subject: Re: [TowerTalk] impedance meter recommendations pse
From: Ian White GM3SEK <>
Reply-to: Ian White GM3SEK <>
Date: Thu, 28 Dec 2006 16:23:41 +0000
List-post: <>
>Has anyone here had good results from any of the non-MFJ impedance meters? I
>have an MFJ-259 and 269 and they are handy to have but not very accurate in my
>experience. I have made lab measurements against these and the results are
>not as good as I'd like.
>At work I designed a network analyzer for production S21 measurements and it
>beats an Agilent 4395A VNA for accuracy. I'm tempted to adapt it for S11
>measurements but I'm a bit lazy. Some other time.
>Ten Tec has a unit that looks nice, I think it uses the Analog Devices AD8302
>gain/phase detector. This isn't the best thing in the world but it would be
>good enough for my uses. But with a price of $600 I'd like to find something a
>bit more reasonable.

If you're willing to build it yourself, and can accept an upper 
frequency limit of 60MHz, the N2PK Vector Network Analyzer is comparable 
in accuracy with professional VNAs of the HP4195A generation.

Details are at and there is a very active user group.

73 from Ian GM3SEK


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