My K2 (#2456) had a similar symptom, but I was in the shack and no damage was done. My battery had failed and was supplying 12 v idle, and about 7 v under load (if you can call 200 milliamps a load<g>).
The noise from the speaker was VERY LOUD. Being there, I switched it off immediately. I tried several things before swapping the power supply. That fixed it, of course. I imagine I made the LOUD NOISE about 8 or 10 times (I'm a slow learner<g>) of about a second each. I have no doubt you cooked something if it went on for some time. The speaker, most likely, if not more thingies. Dan / WG4S -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Joel Kluender Sent: Saturday, July 22, 2006 12:05 PM To: [email protected] Subject: [Elecraft] My ailing K2 - Advice sought... All, The other day my wife called me on the cellphone and said, "what's that awful noise? Your speaker is making a loud noise". I figured out that "my speaker" was the K2, which was supposed to be off, but apparently had been switched on by one of my kids. When I got home and did post-mortem analysis, I determined that the lawnmower battery that I run the K2 off of was dead, so apparently it had been on for quite some time without me realizing it. In addition, there is now no audio output at all from the speaker. Dead. Nada. But the audio through the headphones is fine and I notice no other problems with the rig other than the speaker audio. Before I dig deeper into the schematics and the radio, I wanted to see if anyone else has ever had a similar incident. Best I can tell, the audio went into some sort of feedback loop and blew some of the circuitry, perhaps when the suply voltage went below the lower spec. But not being there, I am not sure the exact sequence of events. Any suggestions? I really am in the mood to get the K2 back to full function. Thanks in advance for the feedback before I hit the bench with soldering iron & multimeter in hand... 73, Joel NF9K __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.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
