Hi Eric, Yes, I stand corrected. I will use a 50 ohm dummy load with an SO239 to BNC adapter when it comes time to calibrate. Also, someone suggested using a 50 ohm terminator plug as used in computer networks. That sounded like a pretty interesting idea.
73, James KC2UEE -----Original Message----- From: Eric Swartz - WA6HHQ, Elecraft [mailto:[email protected]] Sent: Wednesday, February 11, 2009 6:17 PM To: [email protected] Cc: [email protected]; [email protected] Subject: Re: [Elecraft] Calibration of KXV3 module 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 <[email protected]> Date: Wednesday, Feb 11, 2009 1:49 pm Subject: Re: [Elecraft] Calibration of KXV3 module To: James Sarte <[email protected]> CC: "[email protected]" <[email protected]> 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 <[email protected]> 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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
