I have been having a similar problem on 30m through 160m. Output is fine on CW on all bands. On SSB, I am gettting only about 50 watts on those low bands.
It appears to be hardware related, at least in my case. I have been doing a lot of remote troubleshooting with Gary Surrency, and at this point and awaiting my RSA for repair service. 73, John, WA6L williamsonr wrote: > > If this has previously been discussed - please forgive me. > This weekend ten meters was "open" (as much as it could be at the bottom > of a cycle) and the 10-10 contest gave me a great opportunity to try out > the 10 meter band on my recently completed K3 #1318(latest firmware). All > seemed well until I noticed that my power output on SSB was down as > indicated on the K3 power meter and where I normally see 100 watt pep > output on my tuners average reading meter. So I grabbed my Bird 43 (with > PEP option) and a dummy load. Sure enough, only about 50 watts PEP even > though the control on the K3 is at 100? Placed the K3 into tune and > 95-100 watts out? Go back to SSB and now the PEP power is back where it > should be at approx 100 watts PEP. After a few more SSB transmission - > low power again(still connected to the Bird and dummy load). This went on > for a while as I checked and re-checked all of my mic and comp settings. > All other bands worked correctly. Power supply not current limiting, all > connections/cables good (connection to my stati > o! > ! > n ground verified), fresh battery in my studio mic, SWR on ten meter > antenna below 1.4:1 etc. etc. Took the LPA heat sink bottom cover off to > make sure the LPA transistors were making good thermal contact. (I had > added a spot of heat sink compound to each transistor during my assy > process) There was a clear outline of the TO-220 transistor and an even > film of compound indicating good pressure and contact. Put everything > back together. Haven't seen the issue again - yet? But I am not convinced > I did anything to make it go away? > > Anyone else had this experience? > > Rodger > N4NRW > _______________________________________________ > 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 > > -- View this message in context: http://n2.nabble.com/K3---Strange-problem-on-10-Meter-SSB-with-power-out-tp668377p668945.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ 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
