That's true, and that's why I'm confused... continuity tests with L4 and L5 correlate to the rear panel microphone connector and not the line-in jack.
James K2QI -----Original Message----- From: Joe Subich, W4TV [mailto:[email protected]] Sent: Wednesday, August 05, 2009 11:27 PM To: 'James Sarte' Cc: 'Elecraft Reflector' Subject: RE: [Elecraft] K3: Line-In dead (or heavily attenuated) > Chokes look fine but L4 and L5 aren't directly connected to > line-in; they seem to be connected to the microphone in > though. According to the schematic, L4 and L5 are line in ... L6 and L7 are rear panel mic in (L7 is removed in the RFI fix). 73, ... Joe, W4TV > -----Original Message----- > From: James Sarte [mailto:[email protected]] > Sent: Wednesday, August 05, 2009 9:40 PM > To: [email protected] > Cc: Elecraft Reflector > Subject: Re: [Elecraft] K3: Line-In dead (or heavily attenuated) > > > Chokes look fine but L4 and L5 aren't directly connected to > line-in; they seem to be connected to the microphone in > though. I took the KIO3 apart and traced the line-input > circuit for continuity. The whole board looks good with no > cold solder joints. > > Anyway, I put everything back and voila... works like new. > In fact, even better than before. I only need to set the > input gain to about 10 to get a nice signal in from DM780 and > registering about 5.5 to 6 bars ALC. > > This leads me to think two things; > > 1. Something was loose and my refitting the boards took care > of it 2. There's still a cold solder somewhere that gets > affected by heat > > I'll leave the rig on for a while and keep testing. I'm > keeping my fingers crossed. > > 73 de James K2QI > > > On Wed, Aug 5, 2009 at 9:10 PM, Joe Subich, W4TV > <[email protected]> wrote: > > > Check the RF chokes L4 and L5 on the KIO3 Audio IO board. > > 73, > > ... Joe, W4TV > > > > > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of James Sarte > > Sent: Wednesday, August 05, 2009 7:06 PM > > To: Elecraft > > Subject: [Elecraft] K3: Line-In dead (or heavily attenuated) > > > > > > I've sent an email over to Aptos hoping that they may know what's > > going on with my K3. A few days ago, I noticed that sometimes the > > amount of line-in gain required for a digital signal from > DM780 varied > > quite a bit. Some days, all it took was a level of 14 and I'd have > > about 6 bars of ALC. On others, gain had to be set to nearly 25. > > Well, today it seems that my line-in died all together or > at the very > > least has become heavily attenuated. I now have to crank the line > > gain all the way up to 60 to get about 3 bars ALC!! > > > > I have checked, and no audio settings have been changed on > my PC. I > > even plugged in a set of speakers to the line out jack on > the PC and > > everything is fine. What is weird is that sometimes, > fiddling around > > with the mic/line input settings in the Main menu fixes > things for a > > while, but then it's back to almost zero input after a while. > > > > Any suggestions? Lyle seems to think it could be a bad > solder. I'm > > going to let the rig cool off and see if the problem occurs while > > cold. I've also reloaded the current firmware twice, plus > went back > > to 3.19 just to make sure it wasn't a FW issue. > > > > -- > > 73 de James K2QI > ______________________________________________________________ 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
