KPA1500 DC Connector Failure
Locked
 
|
Hi Folks,
I just had a wierd DC connector failure on my KPA1500. The 75A power pole connector that feeds the back of the amplifier section just falls out. It hasn't been hit/moved or anything for years. The failure seems to be due to the weight of the DC cable continually pulling down on the connector - the amp section is on my operating desk and the power supply section is directly underneath it on the floor. That cable is pretty heavy stuff, so I'm not really surprised. So, what's the fix? Has anyone else had this issue? I can easily replace the power pole connectors at the amp end of the cable (maybe just lose a couple of inches of the cable - not a big deal), but what if the "wear" is in the connector part that's soldered to the PCB inside the amp section? I guess I could take it all apart and replace them if needed....but I'd rather not have to. Any ideas? Cheers es 73, Dave Fifield AD6A -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: KPA1500 DC Connector Failure
|
|
Two clicks? You push it in and there's two clicks. Every problem I've
had (once) was I forgot the second click. On Mon, 21 Dec 2020, AD6A wrote: > Hi Folks, > > I just had a wierd DC connector failure on my KPA1500. The 75A power pole connector that feeds the back of the amplifier section just falls out. It hasn't been hit/moved or anything for years. The failure seems to be due to the weight of the DC cable continually pulling down on the connector - the amp section is on my operating desk and the power supply section is directly underneath it on the floor. That cable is pretty heavy stuff, so I'm not really surprised. > > So, what's the fix? Has anyone else had this issue? > > I can easily replace the power pole connectors at the amp end of the cable (maybe just lose a couple of inches of the cable - not a big deal), but what if the "wear" is in the connector part that's soldered to the PCB inside the amp section? I guess I could take it all apart and replace them if needed....but I'd rather not have to. > > Any ideas? > Cheers es 73, > Dave Fifield > AD6A > > -- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] -- Hisashi T Fujinaka - [hidden email] BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
|
|
That's how it used to work, yes. Now it pushes all the way in but it just won't stay there. The clicks are gone. I'll have to look at both sides of the connector and compare with new ones. Dave AD6A > > On Dec 21, 2020 at 9:43 PM, <Hisashi T Fujinaka (mailto:[hidden email])> wrote: > > > > Two clicks? You push it in and there's two clicks. Every problem I've had (once) was I forgot the second click. On Mon, 21 Dec 2020, AD6A wrote: > Hi Folks, > > I just had a wierd DC connector failure on my KPA1500. The 75A power pole connector that feeds the back of the amplifier section just falls out. It hasn't been hit/moved or anything for years. The failure seems to be due to the weight of the DC cable continually pulling down on the connector - the amp section is on my operating desk and the power supply section is directly underneath it on the floor. That cable is pretty heavy stuff, so I'm not really surprised. > > So, what's the fix? Has anyone else had this issue? > > I can easily replace the power pole connectors at the amp end of the cable (maybe just lose a couple of inches of the cable - not a big deal), but what if the "wear" is in the connector part that's soldered to the PCB inside the amp section? I guess I could take it all apart and repla ce them if needed....but I'd rather not have to. > > Any ideas? > Cheers es 73, > Dave Fifield > AD6A > > -- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] (mailto:[hidden email]) -- Hisashi T Fujinaka - [hidden email] (mailto:[hidden email]) BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: KPA1500 DC Connector Failure
|
|
I would certainly stop using it until you find the problem. Could be that
one or both of the contacts on either the cable or amp has lost its temper and is not making a solid contact. Would tend to get very hot and possibly cause further damage if not fixed. On Tue, Dec 22, 2020, 00:11 Dave <[hidden email]> wrote: > > > > That's how it used to work, yes. Now it pushes all the way in but it just > won't stay there. The clicks are gone. I'll have to look at both sides of > the connector and compare with new ones. > > > > Dave AD6A > > > > > > > > > > On Dec 21, 2020 at 9:43 PM, <Hisashi T Fujinaka (mailto: > [hidden email])> wrote: > > > > > > > > Two clicks? You push it in and there's two clicks. Every problem I've > had (once) was I forgot the second click. On Mon, 21 Dec 2020, AD6A wrote: > > Hi Folks, > > I just had a wierd DC connector failure on my KPA1500. > The 75A power pole connector that feeds the back of the amplifier section > just falls out. It hasn't been hit/moved or anything for years. The failure > seems to be due to the weight of the DC cable continually pulling down on > the connector - the amp section is on my operating desk and the power > supply section is directly underneath it on the floor. That cable is pretty > heavy stuff, so I'm not really surprised. > > So, what's the fix? Has > anyone else had this issue? > > I can easily replace the power pole > connectors at the amp end of the cable (maybe just lose a couple of inches > of the cable - not a big deal), but what if the "wear" is in the connector > part that's soldered to the PCB inside the amp section? I guess I could > take it all apart and repla > ce them > if needed....but I'd rather not have to. > > Any ideas? > Cheers es > 73, > Dave Fifield > AD6A > > -- > This email has been checked > for viruses by Avast antivirus software. > > https://www.avast.com/antivirus > > ______________________________________________________________ > Elecraft > mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto: > [hidden email] > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to [hidden email] (mailto:[hidden email]) > -- Hisashi T Fujinaka - [hidden email] (mailto:[hidden email]) > BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee > > > > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
|
|
In reply to this post by Dave AD6A
Almost every APP failure I’ve had occurred when the connector slips back into
the housing a bit and doesn’t clip over the internal metal connector in the housing. Make sure the connector laps over that piece. The 75 amp PP connectors do slip easily from the amp, as was earlier noted make sure you hear or feel 2 clicks and is solidly attached. 73, Lou W0FK -- Sent from: http://elecraft.365791.n2.nabble.com/ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
«
Return to Elecraft
|
1 view|%1 views
| Free forum by Nabble | Edit this page |