There is a mod on the website to fix this problem. Check out the K3 Enhancements and Application Notes page and look for K3 AF OutPut Mod Kit. A simple installation of 2 resistors. 73, Ken K3IU ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
W0MU Mike Fatchett wrote: > I guess I will have to check my speakers. This is a warning that should be > in bold in the manual. > > > > > CC Packet Cluster W0MU-1 > W0MU.NET or 67.40.148.194 > > "A slip of the foot you may soon recover, but a slip of the tongue you may > never get over." Ben Franklin > > > > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken Kopp > Sent: Saturday, April 04, 2009 12:18 PM > To: elecraft@mailman.qth.net > Subject: [Elecraft] K3 external speakers > > The following may well be obvious to most, but I know of at least three K3 > owners who've been "caught" by plugging mono plugs into the (stereo) speaker > jack. > > There is a "gotcha" involved in the use of external speakers with the K3. > It's addressed indirectly on page 20 of the D2 version of the manual in the > 2nd paragraph under PHONES when it reads "... if you use a stereo plug at > the external speaker jack .... but is easily glossed over by the reader. > > Many / most monaural external speakers have a MONAURAL plug on their cords. > DON'T plug one of these (monaural) plugs into the speaker jack. It's > configured for stereo and the sleeve of the mono plug will short the ring > portion of the stereo jack and thereby short one channel of audio. I ... > along with several others ... have experienced a failure of the audio > amplifier IC on the front panel board due to one channel being shorted by > the sleeve of a monaural plug. It seems to take many hours of operation > under this condition to cause the IC to fail ... over a year in mine and > another's case. The IC is -NOT- an easy change! > > Just remember that one audio channel is on the tip and the other is on the > ring of the plug and connect speakers in this manner using -only- a stereo > plug. My particular "trap" was forgetting that using a stereo "Y" merely > moved the "trap" six inches away from the jack. (;-) > > As others have pointed out, speakers from the two-radio field are good > choices, and the CB isle at truck stops usually sell nice speakers. Mine > are Barjan 320-701's. Radio Scrap 21-549B's are OK, too. > > 73! Ken Kopp - K0PP > elecraftcov...@rfwave.net > http://tinyurl.com/7lm3m5 > > > ______________________________________________________________ > 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 > > ______________________________________________________________ > 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 > > ______________________________________________________________ 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
