Craig, Any chance you could post or email me a few pictures? Also, what transformer did you use to replace the stock one?
Thanks! Tom-N2YTF email is n2ytf at the standard arrl email address. Craig-89 wrote: > > > Hi Paul > > I had a similar problem which drove me nuts. > > I pulled the K3 apart to try and find this problem and tightening every > screw in the > re-assembly process. The problem persisted however. This buzz was > following my SSB > modulation with perfect timing. > > I used a stethoscope and found that the buzz was coming from a small area > where the > SWR/power meter directional coupler was situated. The problem turned out > to be one of > the directional couplers transformers which was arcing to the ferrite > core. > > At first sight the transformer looked perfect, however I could clearly > hear the buzz in the > stethoscope. I replaced the ferrite transformer and the buzz went away. > When I examined > this transformer, the arcing signs were very obvious under the enamel > wire facing the > core. > > The directional coupler transformers are very small and its a tricky job > getting it back in > place. Ideally this transformer should have better insulation, however > there is not much > room on the core for extra insulation. > > > 73 > Craig > > > > ______________________________________________________________ > 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 > > -- View this message in context: http://n2.nabble.com/K3-3051-audio-buzz-in-chassis-on-SSB-tp3207427p3207665.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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
