Hi Mike, When you transmit from the K3 what do you see on the left side of the KPA500 display. Obviously it's not an asterisk. Are you seeing an Underscore.
You may have accidentally programmed INHIB IN to ENABLE? See page 20 of the KPA500 manual. You will want it to be in DISABLE. /ENABLE allows the amplifier operation to be inhibited (won’t amplify) when a logic low is applied to pin 11 of the AUX Connector (see pg 26). When amplification is inhibited, an underscore instead of the asterisk appears on the left end of the LCD display./ 73, Mike K2MK Mike VE3YF wrote > Hi: > > I hope nobody gets offended as I have also posted a message on the > Elecraft K3 Group, but I need some help in resolving this issue. I > have searched thru the 2 groups both > here and also on Yahoo and can eliminate a few things. > > - Digout1 is off. > - The top cover interlock for the KPA500 is in place and working. > - KPAK3AUX cable is working with the KPA500 and KAT500 as far as > tuning the KAT500 and communications between the KPA500 and the K3. > - I have recycled the KPA500 off and on as well numerous band changes > and still nothing. > - I have re-seated all the DB15 cables as still nothing > > I am having problems to key the KPA500 from the K3. The KAT500 keys > (Completes the tune cycle if required) but can't key the KPA500. > > I have taken the KPAK3AUX cable from the K3 and placed it directly to > the KPA500 and still won't key. I have moved it back to the KAT500 > and the KAT500 keys up fine. I > have placed the KPA500 - KAT500 cable back back on the KAT500 and > KPA500 and still nothing. > > On the KPA500 display, the HV is at 75.1 and when I key the K3, that > voltage doesn't change as well when I attempt to key the amp, I get a > current reading of 0. > > At no time during my testing did I ever get a fault. > > The K3 and the KPA500 are talking to each other, I can do band > changes from the KPA500, and the K3 displays the KPA500 Status ie > Operate or Standby > > All my tests have been done into a dummy load and when I have the K3 > set at 25 watts output, I get the far left green led on the KPA500 > power and swr bar graphs being > illuminated > > I have even taken the KPAK3AUX cable off the KPA500 and tried putting > a phono cable on the PA Key jack and shorting out the connector still > doesn't key the KPA500. > > I am quite sure others have had this problem before. But I'm at a > loss. The K3 can talk to both the KAT and KPA and the KPA can talk to the > K3. > > I think (???) I can rule out the KPAK3AUX Cable at this point as it > seems to work just fine. I am thinking something inside the KPA500 > like a bad relay since the AUX Cable > and a Phono cable hooked up to the PA Key jack both have no effect. > This is the same for all the bands. > > The amp was just at Elecraft and was given a clean bill of health, it > had TR Circuit updates, ALC and QSK Mods completed. > > Any help would be greatly appreciated. > > 73 De Mike > VE3YF > > http://www.ve3yf.com -- View this message in context: http://elecraft.365791.n2.nabble.com/KPA500-Problems-tp7608044p7608046.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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
