Took me over week to check this, but power is the same whether Tune or Tune/Display — 100 watts!
So, the suspects are likely D16 & D17. Fortunately, the last time I replaced them I put in a couple of pins from a machined pin socket, so it should be an easy job. I’ve had to replace U6 before as well. I think I have a socket there, too. > On May 4, 2019, at 12:11 AM, Don Wilhelm <donw...@embarqmail.com> wrote: > > Bill, > > Set the power at 50 watts and do a TUNE. > Is the output power at 20 to 25 watts? If so, so far so good. > Now try a TUNE/DISPLAY (hold both buttons at once). Is the power near 50 > watts? If so, you have proper power control and the problem is with the LED > display. > > OTOH, if the actual power in both cases above goes to 100 watts or more, then > the first step is to replace KPA100 D16 and D17. If that does not fix > things, there is likely another problem in the KPA100 wattmeter, likely > KPA100 U6 - but get back with the information before replacing it, there are > more tests to verify or deny that possibility. > > 73, > Don W3FPR > > On 5/3/2019 10:25 PM, Bill Coleman wrote: >> I’ve recently seem a problem with my K2/100. It transmits ok, and the power >> level out tracks the power control, but the power indication LEDs remain at >> zero. >> No, I’m not in ALC mode, I’m definitely in RF mode for the meter. >> I’m using an external wattmeter (a Kenwood AT-250 in passthrough mode), and >> can definitely see 100 watts being transmitted. >> I’m thinking that maybe D16 and D17 may have been fried. Is that a good >> guess? Bill Coleman, AA4LR, PP-ASEL Mail: aa...@arrl.net Web: http://boringhamradiopart.blogspot.com Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
