[Elecraft] Calibration of KXV3 module

[Eric Swartz - WA6HHQ, Elecraft]

This will not work. The HT antenna is almost guaranteed -not- to be 50 ohms, especially at the nominal 28 MHz output of the xv port. 

The only place this antenna will be even close to resonance is at its operating fequency (I'm assumung 144 or 432 MHz). And HT antennas are notoiously variable in their actual impedance, since it usually depends on the interaction with you body when you hold the HT.

You need a 50 ohm resistive termination. 

73,

Eric
_..._
-----Original Message-----
From: Mark Bayern <plcmark at gmail.com>
Date: Wednesday, Feb 11, 2009 1:49 pm
Subject: Re: [Elecraft] Calibration of KXV3 module
To: James Sarte <kc2uee at gmail.com>
CC: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>

Will the stubby helical whip really be 50ohms at the freq out from the
XVTR OUT jack? Are you willing to bet your calibration on it?

Mark  AD5SS

On Wed, Feb 11, 2009 at 3:26 PM, James Sarte <kc2uee at gmail.com> wrote:
 Dear group,

>

> Page 50 of the user manual states that a 50 ohm resistor should be attached
 to the XVTR OUT jack for calibration.  If I don't have a resistor, can I use
 a 50 ohm BNC stubby HT antenna instead since output is only 1 mW?

>

> 73,

> James KC2UEE
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