Thanks Fred and Steve. Removing the KAT from the K3 ACC connection did the trick. There are shack configurations where I have no power available to the KAT500, so looks like I yank the ACC plug every time I need that configuration. Strange design, that.
Tnx/73 Gary W2CS On Aug 10, 2014, at 1:40 PM, Cady, Fred <fc...@ece.montana.edu> wrote: > Hi Gary, > If the K3 is turned on when the KAT500 is off, the tuner may pull down > (almost ground) control signals in the K3-KPA Cable, specifically AUXBUS. If > this happens you will be presented with a totally blank K3 display or hung up > K3 and you must turn off the K3's power supply to recover. To avoid this > problem you can either switch on the KAT500 before the K3 or switch them both > on at the same time, which seems to work too (that's what I do). > Here is a procedure to restore the K3 to normal operation: > * Disconnect or turn off all power to the K3. > * If you have a KPA500, turn it off using the back panel AC power switch. > * Turn on the KAT500. > * If you have a KPA500, turn it back on also using the back panel AC > power switch - you don't need to turn on the front panel power switch. (Some > users have reported problems trying to restart their K3 when the KPA500 is > off.) > * Restore power to the K3. > * Turn the K3 power on with the POWER switch. > If this procedure doesn't work, try this: > * Disconnect or turn off all power to the K3. > * Disconnect the K3-KPA Cable from the K3 ACC connector. > * Restore power to the K3. > * Turn the K3 power on with the POWER switch. > If this procedure doesn't work, you may have other problems and it may be > time to call Elecraft Customer Service or to try the K3's EE INIT procedure . > If the above does work, continue with the following: > * Turn the K3 power off with the POWER switch. > * Reconnect the K3-KPA Cable to the K3 ACC connector. > * Turn on the KAT500. > * If you have a KPA500, turn it on also. > * Turn the K3 power on with the POWER switch. > > Cheers and 73, > Fred KE7X > > "The Elecraft K3: Design, Configuration and Operation 2nd ed" > "The Elecraft KX3 - Going for the summit" > "The Elecraft KPA500 and KAT500 - the K-Line Dream Station" > Printed, coil bound copies of these are all available at www.elecraft.com, > pdf's available from www.ke7x.com > KPA500 and KAT500 Quick Set Up Guide > http://www.ke7x.com/home/k-line-introduction-and-set-up-guide > > >> -----Original Message----- >> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of >> Gary Ferdinand >> Sent: Sunday, August 10, 2014 9:11 AM >> To: elecraft >> Subject: [Elecraft] K3 Failure >> >> >> When I powered the K3 up this morning I was greeted with the following >> behavior: >> >> When it powered up, the LCD display was on (yellow) but nothing was >> displayed No Audio No band data sent to the computer Nothing on the P3. >> The K3 could not be powered off with its power switch. >> >> Since my K3/P3/KAT/KPA configuration operated more or less flawlessly, >> I asked "What changed?" >> >> My Acom 2000A was configured to be the amp The power to the KAT500 >> was removed and repurposed Appropriate coaxial cables were rerouted to >> put the 2000A in line (of course) >> >> With the help of a good friend it was determined that the issue was >> that I had removed power from the KAT500 without unplugging the unit >> from the K3's ACC jack. When I unplugged that line, the K3 powered up >> normally. >> >> Why does this happen? Is a powered-off KAT500 an invalid state to the >> K3? >> >> Thanks, >> >> Gary W2CS >> >> >> ______________________________________________________________ >> 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 >> Message delivered to fc...@ece.montana.edu ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
