K3 external speakers
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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 [hidden email] http://tinyurl.com/7lm3m5 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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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: [hidden email] [mailto:[hidden email]] On Behalf Of Ken Kopp Sent: Saturday, April 04, 2009 12:18 PM To: [hidden email] 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 [hidden email] http://tinyurl.com/7lm3m5 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Ken Kopp-3
I have also had a similar need for external speakers.
The recommendation from an "unnamed source (heh heh) " on the left coast was the following http://www.bestbuy.com/site/olspage.jsp?skuId=7314523&type=product&id=111884 3685964 they are not very expensive , to the delete of most of us and seem to work quite well Jay -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Ken Kopp Sent: Saturday, April 04, 2009 2:18 PM To: [hidden email] 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 [hidden email] http://tinyurl.com/7lm3m5 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by w0mu
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: [hidden email] > [mailto:[hidden email]] On Behalf Of Ken Kopp > Sent: Saturday, April 04, 2009 12:18 PM > To: [hidden email] > 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 > [hidden email] > http://tinyurl.com/7lm3m5 > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > 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:[hidden email] > > 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by JayR
I guess to many times hitting the "delete" key...should have been "delight"
-----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Jay Rodaman Sent: Saturday, April 04, 2009 2:46 PM To: [hidden email] Subject: Re: [Elecraft] K3 external speakers I have also had a similar need for external speakers. The recommendation from an "unnamed source (heh heh) " on the left coast was the following http://www.bestbuy.com/site/olspage.jsp?skuId=7314523&type=product&id=111884 3685964 they are not very expensive , to the delete of most of us and seem to work quite well Jay -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Ken Kopp Sent: Saturday, April 04, 2009 2:18 PM To: [hidden email] 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 [hidden email] http://tinyurl.com/7lm3m5 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] 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:[hidden email] 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Ken Wagner K3IU
The AF Output mod had been made to (at least) two of the
K3's that suffered the audio output IC failure, mine included. Perhaps the mod only "helps" and that's why the problem took months to come to failure. My board is slightly scorched, and the IC "burned up" on another board. The audio IC is robust, so I'm told, but can only stand so much for so long. BTW, headphone audio still works after the output IC's failure. Perhaps I'm not too smart, in that I had / have two speakers, so I chose "two speakers" from the menu. (;-). Duh! 73! Ken Kopp - K0PP [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by JayR
I have had these Best Buy speaker since Dec 1, small and sound great. Am very pleased with them 73, Ty, K3 696 --- On Sat, 4/4/09, Jay Rodaman <[hidden email]> wrote: > From: Jay Rodaman <[hidden email]> > Subject: Re: [Elecraft] K3 external speakers > To: [hidden email] > Date: Saturday, April 4, 2009, 2:45 PM > I have also had a similar need for external speakers. > The recommendation from an "unnamed source (heh heh) > " on the left coast > was the following > > > http://www.bestbuy.com/site/olspage.jsp?skuId=7314523&type=product&id=111884 > 3685964 > > they are not very expensive , to the delete of most of us > and seem to work quite well > > Jay > > > > -----Original Message----- > From: [hidden email] > [mailto:[hidden email]] On Behalf Of Ken > Kopp > Sent: Saturday, April 04, 2009 2:18 PM > To: [hidden email] > 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 > [hidden email] > http://tinyurl.com/7lm3m5 > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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