Topband: Interesting Observation

[cris blak]

Hi Brian,

I'll not pass through the theory but I can give you a good reference from Agilent:
"Agilent impedance measurement handbook"

http://cp.literature.agilent.com/litweb/pdf/5950-3000.pdf

I use the I-V method (not RF I-V) with an 10MHz oscilloscope and a T80-2 with 20 turns on it as a current transformer. With this simple set-up I got the I, U and phase difference between theme. 
As a RF source, I use the transceiver with less than 10W.

73 de YO3FFF
Cristi



----- Original Message ----
From: Brian Miller <brianmiller at xtra.co.nz>
To: cris blak <cyo3fff at yahoo.com>; topband at contesting.com
Sent: Fri, February 5, 2010 11:14:50 AM
Subject: Re: Topband: Interesting Observation

Hi Cris

Can you please explain how you go about measuring resonance and impedance with the I-V method?

Thanks

Brian ZL1AZE

----- Original Message ----- From: "cris blak" <cyo3fff at yahoo.com>
To: "Edward Swynar" <gswynar at durham.net>; <topband at contesting.com>
Sent: Thursday, February 04, 2010 11:45 PM
Subject: Re: Topband: Interesting Observation


> Hi Ed,
> 
> I use an INV-L with 36 short suspended radials. I check the resonance and its impedance using I-V method with current transformer and an oscilloscope.