-----Original Message----- From: Don Wilhelm *snip* You can do better calibration with a known dummy load and an RF Probe than you can with most wattmeters - ----------------------------------
Here I need to confess my ignorance. I used the RF probe that came with the K2 to measure K2 output into a dummy load. I got odd results. The voltage would continually increase. It would start out at say 13 VDC. I'd measure for 20 or 30 seconds and it's count up to maybe 16 VDC. I'd back off and then put the probe back on the test point and it would start at maybe 15.5 VDC and count up, going past 16 and continuing. I figured it might go through some rise time as the cap is charging but I never saw it settle out at a value. What's up with that? My dummy load is a TenTec. It's basically a big 50 ohm resistor. I've measured it with the MFJ analyzer and it is flat SWR (50 + 0j ohms) to 60 MHz or so. I've NOT measured it after it heats up though and probably should. Does an RF probe measure RMS, peak, or peak to peak? So confusing ... :-) - Keith N1AS - - K2 5411.ssb.100 - _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
