How accurate do you believe the Bird to be? 73, Mike NF4L
> On May 23, 2016, at 9:35 AM, Edward R Cole <[email protected]> wrote: > > I am getting 100w on all HF bands with about 4w drive. Supply voltage is > 13.71v in Rx and runs 13.12v with 100w output and 13.07v with 110w output > with 5.2w drive (tests on 14-MHz into a Bird Power meter (100H) and Bird > Load). > I compared the reading of the 100H element at 50w on 6m with a 50A element > with nearly identical reading. > > But on 6m it takes 7.2w drive and I only see 72w output at 13.15v. Advancing > drive higher engages the auto-ATT, so it would suggest drive is high enough. > > A little disappointed that 6m did not develop output per spec (80w) though I > guess no one would note the difference of 72 vs 80. I am running a 50A > Astron PS which indicates 13.71v at the PS terminal I have not measured what > that is under load of the KXPA-100 as PS terminals are difficult to reach. > Voltage measured with Fluke model 17B+. > > I may try adjusting the Astron to 14.2v to see if that will improve output; > assuming similar 0.6v drop under load would result in 13.6v. > > I substituted a No.10 PP power cord for the No.12 cord provided with the amp > with no discernable difference. > > 73, Ed - KL7UW > http://www.kl7uw.com > "Kits made by KL7UW" > Dubus Mag business: > [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] ______________________________________________________________ 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]
