[OKDXA] Impedance Bridge?

[William B. Stacy]

Hi again, Kim:

I'm just north of Stillwater.  The figures could be correct for the
shunt-fed tower.

73, Bill, N5TU

-----Original Message-----
From: okdxa-bounces at mailman.qth.net [mailto:okdxa-bounces at mailman.qth.net]
On Behalf Of Kim Elmore
Sent: Sunday, February 24, 2008 6:53 PM
To: okdxa at mailman.qth.net>
Subject: [OKDXA] Impedance Bridge?

Does anyone near Norman have an impedance bridge I could use? I need 
to figure out what the feed impedance is of my short, shunt-fed 
tower. I have a Palomar noise bridge, but the reading I get from it 
is nonsense: 65 + j685 ohms. The sign that cannot be right, because I 
know that the resonant frequency is ~ 9.5 MHz.  Since I want to make 
an L-network to match it, I need to know what the feed impedance is 
so that I can build what I need.

Whatever the impedance is, it's way out there. My Ameritron ATR-15 
cannot match it at the low end of the band and neither can the 
built-in tuner in my Orion II.

Kim Elmore, N5OP

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