I redid the C55 null (it was off by quite a bit now) but that did not solve the problem. I re-initialized the tuner and retuned my non-50 ohm load and my power readings were still way off. Worst on 40m. I'm taking the balun off tonight, we'll see if that makes any difference. If not I guess I'll have to go through and see if I can find any mistakes or errors in the build. Any other ideas?
Tom On Mon, Jul 20, 2009 at 9:51 AM, Tom Campie <[email protected]> wrote: > I just realized something that may be throwing it off - I installed the > Elecraft 4:1 balun inside the rig and hard wired it to ANT 2 on the tuner > after I'd done the bridge null - is it possible that that has thrown off > that null and I am not actually getting a 50 ohm load to the front end? > I'll have to redo that tonight and report back. > > Thanks for the help so far. > > Tom > > > On Sun, Jul 19, 2009 at 11:12 PM, Don Wilhelm <[email protected]>wrote: > >> Tom, >> >> That is exactly what I said. In CALP, if the load is anything other than >> 50+j0, the power indication will be incorrect. In other words, the >> requested power may not equal the actual power. >> >> When you go to AUTO and do a TUNE, the forward power should be close to >> the requested power. >> >> >> 73, >> Don W3FPR >> >> Tom Campie wrote: >> >>> I calibrated the tuner to a 50 ohm load on CALP. With the tuner tuned >>> to a non-50 Ohm load, the requested power does not match the output power >>> by any definition of the word. >>> >>> Tom >>> >>> On Jul 19, 2009, at 9:48 PM, Don Wilhelm wrote: >>> >>> >>> >>>> Tom, >>>> >>>> No adjustment is required. In CALP state, the tuner must be working >>>> into a 50 ohm load for accurate power readings. If you are connected to >>>> an antenna that has a feedpoint impedance other than 50+j0 impedance, you >>>> can expect "unexpected" results. >>>> When you change the ATU menu to Auto and do a TUNE, the tuner has done >>>> its job of providing a 50 ohm match to the K2 and the power out will be as >>>> requested. >>>> >>>> 73, >>>> Don W3FPR >>>> >>>> Tom Campie wrote: >>>> >>>> >>>>> This has been beaten over and over I think but I haven't found >>>>> anything on it yet: >>>>> >>>>> I just got back from the lab at work and used a very well calibrated >>>>> power meter to calibrate my KAT2 power meter. Now on 40m at home, I >>>>> set >>>>> my power control to 5w and tuner to Pout. The tuner now reads 2.9w. >>>>> Not >>>>> until I tune the requested power to 8 watts or so does the tuner say I'm >>>>> putting out 5 watts. Isn't there a way to adjust it so that the >>>>> requested >>>>> power matches the tuner output power so that the S/ Power meter reads the >>>>> right value? That's the most annoying part... >>>>> >>>>> Tom >>>>> ______________________________________________________________ >>>>> 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 >>>>> >>>>> ------------------------------------------------------------------------ >>>>> >>>>> >>>>> No virus found in this incoming message. >>>>> Checked by AVG - www.avg.com Version: 8.5.375 / Virus Database: >>>>> 270.13.20/2248 - Release Date: 07/19/09 05:57:00 >>>>> >>>>> >>>>> >>>>> >>>> >>> ______________________________________________________________ >>> 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 >>> ------------------------------------------------------------------------ >>> >>> >>> No virus found in this incoming message. >>> Checked by AVG - www.avg.com Version: 8.5.375 / Virus Database: >>> 270.13.20/2248 - Release Date: 07/19/09 05:57:00 >>> >>> >>> >> > ______________________________________________________________ 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
