G'day, Less than 20mV in all circumstances as measured on my Fluke 8020B. Unfortunately I don't have a 'scope so I can't look at the frequency component. I used to have access to an earth stations worth of fancy test equipment so never bought my own!
I really don't think it is a PSU issue. Something is stalling the logic, maybe not enough time for internal supplies or logic states to settle before ignition sequence starts. Regards, Mike VP8NO ----- Original Message ----- From: "Guy Olinger K2AV" <[email protected]> To: "Mike Harris" <[email protected]> Cc: <[email protected]> Sent: Wednesday, November 24, 2010 3:36 AM Subject: Re: [Elecraft] K3 LEDs light up, but won't come to life > Just covering some bases... Put an AC voltmeter on the DC leads > from the > switching supply and make sure any AC voltage is way way down in > the > millivolts. Light load, heavy load, no load. 73, Guy. > > On Tue, Nov 23, 2010 at 6:44 PM, Mike Harris > <[email protected]> wrote: > >> Yes. >> >> >> ----- Original Message ----- From: "Guy Olinger K2AV" < >> [email protected]> >> To: "Mike Harris" <[email protected]> >> Cc: <[email protected]> >> Sent: Tuesday, November 23, 2010 6:28 PM >> >> Subject: Re: [Elecraft] K3 LEDs light up, but won't come to life >> >> >> Is that what you read on the K3 front panel display? >> >> >> On Tue, Nov 23, 2010 at 4:20 PM, Mike Harris >> <[email protected]> >> wrote: >> >>> 13.8V from an Alinco DM-330MW switcher >>> >>> Mike VP8NO >>> >>> ----- Original Message ----- From: "Guy Olinger K2AV" >>> <[email protected]> >>> To: "Mike Harris" <[email protected]> >>> Cc: <[email protected]> >>> Sent: Tuesday, November 23, 2010 6:04 PM >>> Subject: Re: [Elecraft] K3 LEDs light up, but won't come to life >>> >>> >>> What is the power supply supply voltage? 73, Guy. >>> >>> On Tue, Nov 23, 2010 at 3:58 PM, Mike Harris >>> <[email protected]> >>> wrote: >>> >>>> >>>> Hi, >>>> >>>> I've started to notice this in the past couple of months. I >>>> turn >>>> the PSU off for a few seconds, then back on and all is OK. It >>>> has >>>> happened maybe a dozen times. >>>> >>>> Regards, >>>> >>>> Mike VP8NO >>>> >>>> ----- Original Message ----- >>>> From: "Eric Rosenberg" <[email protected]> >>>> To: <[email protected]> >>>> Sent: Tuesday, November 23, 2010 5:49 PM >>>> Subject: [Elecraft] K3 LEDs light up, but won't come to life >>>> >>>> >>>> thi has happened three times: >>>>> >>>>> I turn on the K3, the LEDs on the four knobs under the display >>>>> light up, but >>>>> the display stays dark and I cannot power it off with the >>>>> power >>>>> button. >>>>> >>>>> I have to disconnect the power, wait a little bit and >>>>> re-connect >>>>> the radio. >>>>> It comes back to life when I power it on. >>>>> >>>>> What's happening? >>>>> >>>>> Eric W3DQ >>>>> Washington, DC >>>>> >>>> >> > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.869 / Virus Database: 271.1.1/3275 - Release Date: 11/23/10 16:34:00 ______________________________________________________________ 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
