Re: [Elecraft] KAT500 failure

2021-04-10 Thread Andy Durbin
"I've been at V1.75 firmware for quite some time but random lockups of the KAT500 started recently. It might be helpful knowing what command caused the problem." Please establish a repeatable test method and report to Elecraft. As I have said more than once, the issue I experienced does NOT

Re: [Elecraft] KAT500 failure

2021-04-10 Thread KK1W
I've been at V1.75 firmware for quite some time but random lockups of the KAT500 started recently. It might be helpful knowing what command caused the problem. Jim/KK1W w4sc-2 wrote > Andy reported. > > “Several have asked for more detail. All I can share is that the command > that >

Re: [Elecraft] KAT500 failure

2021-04-09 Thread w4sc
Andy reported. “Several have asked for more detail. All I can share is that the command that repeatably caused my KAT500 to lockup does not cause a lockup when KAT firmware version 1.75 (current released version) is in use.” The possible paths to take are obvious: 1) UPDATE your firmware if

Re: [Elecraft] KAT500 failure

2021-04-09 Thread Julia Tuttle
Is there a reason to keep this a secret? On Fri, Apr 9, 2021, 09:13 Andy Durbin wrote: > "My controller sent a valid command that the KAT500 firmware took > exception to. I'll withhold the details but other KAT500 users will not > experience this problem." > > Several have asked for more

Re: [Elecraft] KAT500 failure

2021-04-09 Thread Andy Durbin
"My controller sent a valid command that the KAT500 firmware took exception to. I'll withhold the details but other KAT500 users will not experience this problem." Several have asked for more detail. All I can share is that the command that repeatably caused my KAT500 to lockup does not

Re: [Elecraft] KAT500 failure

2021-04-09 Thread KK1W
ANDY DURBIN wrote > "It's still working over 30 minutes after the fridge cold soak." > > I was tricked by confirmation bias. The cold soak was not what fixed the > problem. > > My controller sent a valid command that the KAT500 firmware took exception > to. I'll withhold the details but other

Re: [Elecraft] KAT500 failure

2021-04-08 Thread Julia Tuttle
Would you be willing to share it? I'm morbidly curious at this point. On Thu, Apr 8, 2021, 23:02 Andy Durbin wrote: > "It's still working over 30 minutes after the fridge cold soak." > > I was tricked by confirmation bias. The cold soak was not what fixed the > problem. > > My controller sent

Re: [Elecraft] KAT500 failure

2021-04-08 Thread Andy Durbin
"It's still working over 30 minutes after the fridge cold soak." I was tricked by confirmation bias. The cold soak was not what fixed the problem. My controller sent a valid command that the KAT500 firmware took exception to. I'll withhold the details but other KAT500 users will not

Re: [Elecraft] KAT500 failure

2021-04-08 Thread Victor Rosenthal 4X6GP
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Re: [Elecraft] KAT500 failure

2021-04-08 Thread Andy Durbin
"I guess that the 10uF electric capacitor connected to LM7805 output is a possible cause." All the front panel LED seem to be on that same 5V rail and they stay normal brightness in the fault condition. I suspect something, other than low voltage is killing the MCU. It's still working over

Re: [Elecraft] KAT500 failure

2021-04-08 Thread Keith Onishi
I guess that the 10uF electric capacitor connected to LM7805 output is a possible cause. 73 de JH3SIF, Keith > 2021/04/09 7:35、Andy Durbin のメール: > > "I'm suspecting the KAT500 has a thermal problem. Does anyone recognize > these symptoms and know a probable cause?" > > I put it in the

Re: [Elecraft] KAT500 failure

2021-04-08 Thread Andy Durbin
"I'm suspecting the KAT500 has a thermal problem. Does anyone recognize these symptoms and know a probable cause?" I put it in the fridge for 30 minutes and now it powers up normally, connects to KAT Utility and responds to utility commands. It's clear it's a thermal problem but which

[Elecraft] KAT500 failure

2021-04-08 Thread Andy Durbin
My KAT500 has stopped communicating with my controller and does not power up normally. With PC data cable removed, when I pull and replace the power plug the KAT500 powers up with a relay clunk and with MAN and ANT 1 LED lit. All front panel buttons are unresponsive. The same thing happened a