I’ve found that one should use a 12” to 18” jumper of known good condition and quality. Use this jumper to connect the dummy load direct to the radio. No switches, and no tuners in bypass mode.
The dummy load should be 50 ohms +/- 5 (thats 10%) ohms and be resistive. Light bulbs and soldered up resistors and the like, aren’t resistive, meaning no reactance. Don’t take what’s written on the label as fact! They change! Measure them with an ohm meter and antenna bridge at several points from 1.8 MHz to 54 MHz. Anything greater than 1.1 to 1 is out of tolerance. Run TX Gain cal on all bands. Your results are only as accurate as your procedure and test equipment. Bob, K4TAX Sent from my iPhone > On Apr 7, 2020, at 10:59 AM, Bill Steffey NY9H <[email protected]> wrote: > > thought it good day to do a tx calibration. > > I don't very often use 30 meters.. and today the calib quits at 30 meters > saying too high for calibration 4.1 swr... > > All other bands indicate swr of 1.1 // except 10mHz... > > > I looked and the 10mHz low pass filter is shared with 14mHZ... and 20 looks > ok. Don't know if the problem is in the tuner while in "BYPASS " for the > test, or elsewhere. Any help ??? searching found nothing for me. > > > bill > > > > -- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
