I’ve used my K3 to drive my smaller external amplifier during CW contests such as FD with 100 watts output, I found setting up to save the K3 for high rate TXing exchanges at a lower duty cycle and stress so 500+Qs will keep full power as distributed at a cooler configuration W1QS
Sent from the all new AOL app for iOS On Thursday, January 9, 2025, 12:27 PM, elecraft-requ...@mailman.qth.net <elecraft-requ...@mailman.qth.net> wrote: Send Elecraft mailing list submissions to elecraft@mailman.qth.net To subscribe or unsubscribe via the World Wide Web, visit http://mailman.qth.net/mailman/listinfo/elecraft or, via email, send a message with subject or body 'help' to elecraft-requ...@mailman.qth.net You can reach the person managing the list at elecraft-ow...@mailman.qth.net When replying, please edit your Subject line so it is more specific than "Re: Contents of Elecraft digest..." Today's Topics: 1. KAT500 BYB - was new post. (Andy Durbin) 2. Re: K3 F6 Fault coupled with KPA1500 power input fault (RICK SCHMIEDT) ---------------------------------------------------------------------- Message: 1 Date: Wed, 8 Jan 2025 17:14:28 +0000 From: Andy Durbin <a.dur...@msn.com> To: "elecraft@mailman.qth.net" <elecraft@mailman.qth.net> Subject: [Elecraft] KAT500 BYB - was new post. Message-ID: <dm4pr10mb6791fe6c7ecd8f669860a41f8c...@dm4pr10mb6791.namprd10.prod.outlook.com> Content-Type: text/plain; charset="iso-8859-1" "When I first connected the KAT to my system using the instructions give to me by Rob at Elecraft the KAT goes into Bypass upon power-up. What is wrong?" Why do you assume anything is wrong? Bypass Mode, Auto mode with Bypass state, and MAN mode with Bypass state are all valid KAT500 conditions and not necessarily indicative of any problem. I'll avoid the admonishment to RTFM since the KAT500 User's Guide is still at Revision D1, August 15, 2019. This predates the firmware change that allows BYP LED to be lit at the same time as AUTO or MAN LED. If BYP is lit together with AUTO or MAN it simply means the tuner is in BYPASS state which is electrically identical (as far as the RF path is concerned) to BYP mode. Andy, k3wyc ------------------------------ Message: 2 Date: Wed, 8 Jan 2025 13:48:48 -0500 From: RICK SCHMIEDT <schmi...@bellsouth.net> To: Dick Dievendorff <d...@elecraft.com> Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 F6 Fault coupled with KPA1500 power input fault Message-ID: <4c3fed1d-8781-47f4-b9d2-62ba6c744...@bellsouth.net> Content-Type: text/plain; charset=utf-8 Thanks for your input Dick. I do have all those items set up in my K3 and it and the amp have been running fine for many years. On the KPA1500 GroupsIO page, someone who had this problem suggested that the protection diodes on the input circuit to the KPA may be bad. He fixed it by buying new diodes and putting them in. I also checked out the amp using low power (5W) from the K3 and the KPA still goes into input over-power mode (fault 60) with no sign of any power surge from the K3, so I?m thinking the problem is in the KPA1500. The K3 seems to run fine barefoot and when the amp is in bypass mode. Now I?d love to find a circuit diagram and part numbers for the amp so I can trace what?s going on myself. Any other suggestions? Sent from my iPhone > On Jan 7, 2025, at 1:27?AM, Dick Dievendorff <d...@elecraft.com> wrote: > > ?I?d verify that the K3 menu item PWR SET is PER BAND and the KPA1500 menu > item RADIO TYPE is K3. Verify that the AUX cable connects K3 to amp. > > Then on each band, put the amp in OPER, turn the K3 power way down, then key > down and advance K3 power level until the amp power is right. > > The K3 should have two separate stored power levels for each band, one each > for amp in OPER and STBY. My K3 changes power from 100 to about 25 watts > when I change the KPA1500 from STBY to OPER. > > It sounds like your K3 is putting out 100 watts with the amp in OPER. That?s > way too much. 20 to 30 is closer. It?ll vary band to band. > > > 73 de Dick, K6KR > >> On Jan 6, 2025, at 14:56, RICK SCHMIEDT <schmi...@bellsouth.net> wrote: >> >> ?Hey all, >> I have a 7000 serial number K3 that has performed flawlessly over the last >> 10 years. But during the ARRL RTTY Roundup, my KPA1500 faulted with the >> message: >> Fault: Power input 102 Watts. Then I noticed that there was a Fault 6 that >> flashed by on the K3 screen. It now does this on all bands and into a dummy >> load. It doesn?t seem to happen when the low power amp in the K3 is used >> (less than 13 Watts). >> >> Without the amp in line, the K3 seems to work normally and the output power >> stays where it should. I know this topic has been covered before, but I?m >> not finding a solution. Can anyone point me in the right direction? I have >> not contacted the Home Ship yet. >> >> Thanks, >> Rick >> W4GE >> ______________________________________________________________ >> 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 d...@elecraft.com ------------------------------ _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must be a subscriber to post. Elecraft web page: http://www.elecraft.com End of Elecraft Digest, Vol 249, Issue 8 **************************************** ______________________________________________________________ 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
