Hi Jim I don't have any LDG meters anymore but do have others a digital in my Palstar HF-Auto tuner, an Alpha 4510 and a Palstar DL2K dummy load/wattmeter. My K3 set at 50w the HF-Auto read 48w, the Alpha 4510 49w on analog/digital meters both and the dummy load 41w. If you have a bird to place in line try that but my Alpha is 100% reading scale as a fresh calibrated bird and new slugs on mine from 5w it goes down to .3w and 2400w goes to 3000w. But like you said quite a bit of money but matches my amp well.
You need to come up with a known meter before going any further or I would in that case. 73, Fred/N0AZZ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jim Bennett Sent: Sunday, January 06, 2013 9:30 PM To: Elecraft Reflector Reflector Subject: [Elecraft] K3 RF Power Meter Accuracy I've been using my K3 #4359 now for several years w/o any issues. Just this past week I acquired an LDG AT-600ProII auto tuner and the matching M-600 analog meter. I calibrated the M-600 per the instructions. What I'm seeing is that the M-600 meter is showing me higher RF output than the K3's bar graph on most bands. As an example, after setting the KAT3 to Bypass, using the AT-600 to bring an antenna to a match (close to 1:1) with 5 watts out of the K3, I turn the K3 power output to 25 watts. A key-down on the K3 shows 25 watts on the K3 bar graph, but the M-600 tells me that the power is about 39-40 watts. It is like this on nearly all the bands, 160-10 meters. On 6 meters, the M-600 reads about 20% LOWER than the K3. I sent an email to LDG and asked them what's up - which is correct - the K3, or the LDG unit? Their response is that the K3 most likely is incorrect, as they calibrate their equipment with an Alpha 4500. That's a tad of an expensive meter, to say the least. Are the LDG folks tweaking me on this, or is that M-600 really more accurate than the RF bar graph on the K3? Jim / W6JHB ______________________________________________________________ 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
