This was true with some early optional TCXO-3 units that had exposed SMDs on the bottom of the can. There was a capacitor that could potential short to the metal socket where the missing pin would have been. Hence the addition of the insulation. This is not a problem with the standard reference oscillator as there are no exposed parts on the bottom.
Stewart, Do you have the optional TCXO-3 and what is the radio's serial number? ------------------------- 73, Greg - AB7R Whidbey Island WA NA-065 K3#0009 and 0319 On Mon Mar 10 13:16 , "Bruce Bowman" sent: >Hi Stewart- > >Like you, I had a problem with my K3 going dead. Unlike you, I bought a >factory-built unit. I did that because I wanted to know it was working >properly from the start. That turned out to be one of those things that >sounds like a good idea but doesn't withstand close scrutiny. > >What I saw initially was an occasional error message (ERR PL1) when >switching to another band, then the audio would decay to nothing over a >2 second period. Sometimes I could get it to recover by chnaging bands, >sometimes not. > >Since it was factory built, they had me return my K3. They found the >TCXO3-1 oscillator was grounding occasionally. The oscillator would >continue to operate, but grounding it (the case? some component? dunno) >caused the frequency to be pulled about 20 KHz and the receiver would >die. They replaced the oscillator (probably unnecessary), added an >insulator and re-ran VCO calibration. It's been rock-solid ever since. > >Bruce, NM5B >Santa Fe, NM > >----- Original Message ----- >From: "Stewart Baker" [EMAIL PROTECTED]> >To: "AB7R" [EMAIL PROTECTED]>; "Elecraft Reflector" >[email protected]> >Sent: Monday, March 10, 2008 5:33 AM >Subject: RE: [Elecraft] K3 - RX Problem after latest firmware update > > >Greg, >Have re-installed V1.75 & V1.57 again, no change. > >Here is a sequence which you might like to try:- > >POWER >80m LSB 3780 >NORM >LO CUT=0.15 >SAV ALT1 >NORM >TX ON/OFF >ALT1 >TX ON/OFF >Receive may be dead at this point > >If not continue with >Select USB >ALT1 >TX ON/OFF >Receive dead > >Switching bands, modes or NORM always restores receiver. > >I do (from my point of view) hope that I am not the only one with >this funny.. > >73 >Stewart G3RXQ > >On Sun, 9 Mar 2008 12:30:15 -0700, AB7R wrote: >> Stewart, >> >> Try installing the new firmware again. I just tried to recreate >your report >> and the radio performs as expected...no problem with RX after a >transmit >> with ALT1 set to 0.15 on the LO side. >> >> 73 >> Greg >> AB7R >> >> >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [EMAIL PROTECTED]','','','')">[EMAIL PROTECTED] Behalf Of Stewart >Baker >> Sent: Sunday, March 09, 2008 11:32 AM >> To: Elecraft Reflector >> Subject: [Elecraft] K3 - RX Problem after latest firmware update >> >> >> I am not sure if there is an obscure problem after the latest >MCU >> and DSP update. Maybe others could check and see if it happens >to >> them ? >> >> Any band on SSB if I have the DSP set to ALT1 with the Low Cut >set >> at 0.15 Hz , then after going onto transmit the receiver appears >> to be dead. If I set the DSP to NORM by pressing the knob the >> receiver suddenly bursts into life... >> This happens whether there is any transmit audio or RF out. >> >> 73 >> Stewart G3RXQ >> _______________________________________________ >> 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 >> No virus found in this incoming message. >> Checked by AVG. >> Version: 7.5.518 / Virus Database: 269.21.7/1322 - Release Date: >3/9/2008 >> 12:17 PM >> >> No virus found in this outgoing message. >> Checked by AVG. >> Version: 7.5.518 / Virus Database: 269.21.7/1322 - Release Date: >3/9/2008 >> 12:17 PM > > >_______________________________________________ >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 > > >_______________________________________________ >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 _______________________________________________ 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
