Re: [Elecraft] KPA500 Dead
Lyn, On your KAT500, do contact support about it, and if they want you to send it in, do so. Many techs are working from home, and while the time from receipt at Elecraft until it is shipped may be longer, the process still is working. Who knows when this coronavirus thing will subside and things will get fully back to normal and full in-office staffing, but Elecraft is 'limping along' to support customers. 73, Don W3FPR On 6/5/2020 5:39 PM, Lyn Norstad wrote: Tom - I had the same experience a few months back. I talked with Elecraft Support, and they had me check a few things. There was no obvious cause, except the power supply board was dead. They asked me to send it in, which I did, and they replaced the board. Fortunately I got it back a couple days before the COVID shutdown hit, and it has been fine since. As a precautionary move, they changed the power transformer back to the default setting. I had set it up one notch because our line voltage is low, and that was needed to get it "near" the optimal value. I also have tuner (KAT500) issues, but will live with it, as I am reluctant to send anything anywhere at this time. __ 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
Re: [Elecraft] KPA500 Dead
Tom - I had the same experience a few months back. I talked with Elecraft Support, and they had me check a few things. There was no obvious cause, except the power supply board was dead. They asked me to send it in, which I did, and they replaced the board. Fortunately I got it back a couple days before the COVID shutdown hit, and it has been fine since. As a precautionary move, they changed the power transformer back to the default setting. I had set it up one notch because our line voltage is low, and that was needed to get it "near" the optimal value. I also have tuner (KAT500) issues, but will live with it, as I am reluctant to send anything anywhere at this time. 73 Lyn, W0LEN -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Tom Berry Sent: Friday, June 05, 2020 11:05 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA500 Dead I was operating on FT8 20 meters for quite a long time with my KPA500 running about 400 watts and heard a few pops (like something arching). Heard it a few more times then the amp went off. Now it will not power on. No lights, nothing. I checked the fuse and it is OK. Can you tell me where to start looking? Thanks Tom AAA4VV __ 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 l...@lnainc.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
Re: [Elecraft] KPA500 Dead
Actually four. There are two on the power supply board that protect the low voltage supply. Since the front panel appears not to be powering up, it is possible that one or both of these may be blown. I don’t really have any suggestions for what might be wrong, so the best thing to do is to contact customer support. They are still rather busy, so it might take a little while for them to get back to you, but I am sure they will be able to help. Good luck, and hope we can help you get your KPA500 back up and running quickly! 73, Jack, W6FB > On Jun 5, 2020, at 11:41 AM, Bob McGraw K4TAX wrote: > > You say you checked the "fuse" and it is OK. In fact, there are two fuses. > If either has failed the amp won't power on. Then check the voltage at the > outlet from where the amp is powered. > > If you don't know where to start looking,.if the above two items are > OK, then I suggest sending an e-mail to tech support at Elecraft and ask for > a RA. Chances are the issue is beyond local repair, either by knowledge or > test equipment and parts. > > 73 > > Bob, K4TAX > > > On 6/5/2020 11:04 AM, Tom Berry wrote: >> I was operating on FT8 20 meters for quite a long time with my KPA500 >> running about 400 watts and heard a few pops (like something arching). >> Heard it a few more times then the amp went off. >> >> Now it will not power on. No lights, nothing. I checked the fuse and it is >> OK. >> >> Can you tell me where to start looking? >> >> >> Thanks >> >> Tom AAA4VV >> >> __ >> 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 rmcg...@blomand.net > > __ > 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 jackbrin...@me.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
Re: [Elecraft] KPA500 Dead
On 6/5/2020 2:41 PM, Bob McGraw K4TAX wrote: You say you checked the "fuse" and it is OK. In fact, there are two fuses. If either has failed the amp won't power on. Then check the voltage at the outlet from where the amp is powered. If you don't know where to start looking,.if the above two items are OK, then I suggest sending an e-mail to tech support at Elecraft and ask for a RA. Chances are the issue is beyond local repair, either by knowledge or test equipment and parts. 73 Bob, K4TAX Thanks Bob, I am sure you are correct. Just hate to send it off since I use it about every day. I am retired and if I don't have any wife jobs then I'm on the radio. I have seen you give many good answers here. Thanks 73 Tom AA4VV __ 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
Re: [Elecraft] KPA500 Dead
On 6/5/2020 2:10 PM, Alan - G4GNX wrote: Yes, we're supposed to have some technical background, but by asking "where do I start" tends to indicate that there might just be an insufficiency of necessary knowledge. I would hate to see someone die, because I had failed to speak out. :-) I also built several Elecraft products, including a couple of KPA500s, and the manual clearly indicates screwing the lid down, before powering up. There's a good reason for that. My apologies to the OP. I have no wish to offend you. 73, Alan. G4GNX Hi Alan, You have not offended me. I have taken the top off and looked around. I certainly don't see anything that looks like it has been arching. The AC power is ok. The fuses are ok. Just thought someone would have an idea on where to start looking. I have emailed Elecraft but so far no answer. Sent the email on 6/3/2020. Thanks 73 Tom AA4VV __ 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
Re: [Elecraft] KPA500 Dead
On 6/5/2020 2:02 PM, Jim Brown wrote: On 6/5/2020 9:33 AM, Alan - G4GNX wrote: Unless you really know what you're doing, then you should not remove the lid. Fault finding could easily result in the need to power up and expose yourself to many hidden dangers. Ummm -- we're hams, and are supposed to have at least some technical background. If we can't open up a product like one of the Elecraft rigs and at least look around we ought to send our boxtop license back to the government agency that issued it. That doesn't mean that we should attempt circuit board level troubleshooting. Elecraft sells most of their products as kits that require minimal assembly of pre-tested circuit boards and other components. I built two K3s, a KX3, two P3s with SVGA boards, and a KPA500. The KPA1500 is not available as a kit. 73, Jim K9YC Jim, I didn't say I couldn't look around and I'm certainly not going to send my "BOXTOP" license back. I have had it since 1955. Took all the CW tests in front of an examiner etc. I want to congratulate you on building all the Elecraft stuff. I have built an AT-1, the 30 watt Heathkit transmitter, DX100, HW101, and various test equipment. Tom AA4VV ex W8VSV. __ 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
Re: [Elecraft] KPA500 Dead
You say you checked the "fuse" and it is OK. In fact, there are two fuses. If either has failed the amp won't power on. Then check the voltage at the outlet from where the amp is powered. If you don't know where to start looking,.if the above two items are OK, then I suggest sending an e-mail to tech support at Elecraft and ask for a RA. Chances are the issue is beyond local repair, either by knowledge or test equipment and parts. 73 Bob, K4TAX On 6/5/2020 11:04 AM, Tom Berry wrote: I was operating on FT8 20 meters for quite a long time with my KPA500 running about 400 watts and heard a few pops (like something arching). Heard it a few more times then the amp went off. Now it will not power on. No lights, nothing. I checked the fuse and it is OK. Can you tell me where to start looking? Thanks Tom AAA4VV __ 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 rmcg...@blomand.net __ 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
Re: [Elecraft] KPA500 Dead
Yes, we're supposed to have some technical background, but by asking "where do I start" tends to indicate that there might just be an insufficiency of necessary knowledge. I would hate to see someone die, because I had failed to speak out. :-) I also built several Elecraft products, including a couple of KPA500s, and the manual clearly indicates screwing the lid down, before powering up. There's a good reason for that. My apologies to the OP. I have no wish to offend you. 73, Alan. G4GNX -- Original Message -- From: "Jim Brown" To: elecraft@mailman.qth.net Sent: 05/06/2020 19:02:23 Subject: Re: [Elecraft] KPA500 Dead On 6/5/2020 9:33 AM, Alan - G4GNX wrote: Unless you really know what you're doing, then you should not remove the lid. Fault finding could easily result in the need to power up and expose yourself to many hidden dangers. Ummm -- we're hams, and are supposed to have at least some technical background. If we can't open up a product like one of the Elecraft rigs and at least look around we ought to send our boxtop license back to the government agency that issued it. That doesn't mean that we should attempt circuit board level troubleshooting. Elecraft sells most of their products as kits that require minimal assembly of pre-tested circuit boards and other components. I built two K3s, a KX3, two P3s with SVGA boards, and a KPA500. The KPA1500 is not available as a kit. 73, Jim K9YC __ 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
Re: [Elecraft] KPA500 Dead
On 6/5/2020 9:33 AM, Alan - G4GNX wrote: Unless you really know what you're doing, then you should not remove the lid. Fault finding could easily result in the need to power up and expose yourself to many hidden dangers. Ummm -- we're hams, and are supposed to have at least some technical background. If we can't open up a product like one of the Elecraft rigs and at least look around we ought to send our boxtop license back to the government agency that issued it. That doesn't mean that we should attempt circuit board level troubleshooting. Elecraft sells most of their products as kits that require minimal assembly of pre-tested circuit boards and other components. I built two K3s, a KX3, two P3s with SVGA boards, and a KPA500. The KPA1500 is not available as a kit. 73, Jim K9YC __ 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
Re: [Elecraft] KPA500 Dead
Tom, The best place to start is with your AC Power. If that is OK, the next step is to email supp...@elecraft.com. 73, Don W3FPR On 6/5/2020 12:04 PM, Tom Berry wrote: I was operating on FT8 20 meters for quite a long time with my KPA500 running about 400 watts and heard a few pops (like something arching). Heard it a few more times then the amp went off. Now it will not power on. No lights, nothing. I checked the fuse and it is OK. Can you tell me where to start looking? __ 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
Re: [Elecraft] KPA500 Dead
There’re a couple things in series with the transformer primaries that look like thermistors. Wonder about them. They’re labeled T and SL 1, and SL 2. Chuck Jack Hawley KE9UW Sent from my iPhone, cjack > On Jun 5, 2020, at 12:08 PM, Nr4c wrote: > > Fuses! > > 400 Watts “for quite a long time”? Bet the fans were happy. > > Sent from my iPhone > ...nr4c. bill > > >> On Jun 5, 2020, at 12:07 PM, Tom Berry wrote: >> >> I was operating on FT8 20 meters for quite a long time with my KPA500 >> running about 400 watts and heard a few pops (like something arching). >> Heard it a few more times then the amp went off. >> >> Now it will not power on. No lights, nothing. I checked the fuse and it is >> OK. >> >> Can you tell me where to start looking? >> >> >> Thanks >> >> Tom AAA4VV >> >> __ >> 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 n...@widomaker.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 c-haw...@illinois.edu __ 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
Re: [Elecraft] KPA500 Dead
Fuses! 400 Watts “for quite a long time”? Bet the fans were happy. Sent from my iPhone ...nr4c. bill > On Jun 5, 2020, at 12:07 PM, Tom Berry wrote: > > I was operating on FT8 20 meters for quite a long time with my KPA500 > running about 400 watts and heard a few pops (like something arching). Heard > it a few more times then the amp went off. > > Now it will not power on. No lights, nothing. I checked the fuse and it is > OK. > > Can you tell me where to start looking? > > > Thanks > > Tom AAA4VV > > __ > 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 n...@widomaker.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
Re: [Elecraft] KPA500 Dead
With all due respect, if you don't know where to start looking, then please don't. Unless you really know what you're doing, then you should not remove the lid. Fault finding could easily result in the need to power up and expose yourself to many hidden dangers. It's been suggested that lack of AC power may be the cause. That should be a safe thing to check, without opening the KPA500. Stay safe - send it back to Elecraft. :-) 73, Alan. G4GNX -- Original Message -- From: "Tom Berry" To: elecraft@mailman.qth.net Sent: 05/06/2020 17:04:41 Subject: [Elecraft] KPA500 Dead I was operating on FT8 20 meters for quite a long time with my KPA500 running about 400 watts and heard a few pops (like something arching). Heard it a few more times then the amp went off. Now it will not power on. No lights, nothing. I checked the fuse and it is OK. Can you tell me where to start looking? Thanks Tom AAA4VV __ 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 g4...@g4gnx.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
[Elecraft] KPA500 Dead
"Can you tell me where to start looking?" A report of a similar event was posted just a few weeks ago. Some of us were assuming it was a KPA500 failure but it turned out to be a failure of the input AC voltage. Is AC power present? Does the KPA500 power up if connected to a known good power outlet? Andy, k3wyc __ 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
[Elecraft] KPA500 Dead
I was operating on FT8 20 meters for quite a long time with my KPA500 running about 400 watts and heard a few pops (like something arching). Heard it a few more times then the amp went off. Now it will not power on. No lights, nothing. I checked the fuse and it is OK. Can you tell me where to start looking? Thanks Tom AAA4VV __ 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
Re: [Elecraft] KPA500 dead again
You should call tech to fix get resolved. Nothing this reflector can do for you. Bill K9YEQ Have a great day! Bill From: elecraft-boun...@mailman.qth.net on behalf of Lyn Norstad Sent: Tuesday, February 25, 2020 8:50:12 AM To: Elecraft Reflector Subject: [Elecraft] KPA500 dead again I have KPA500 s/n 3835 which I purchased along with a KAT500, factory assembled, last Summer. It soon died and was subsequently returned to Elecraft at the beginning of August for service, and several parts were replaced. One part was missing. The unit was received back from Elecraft at the end of August and has worked flawlessly since that time. They extended the warranty to cover the initial defects (thank you, Elecraft!). Today, after operating a few hours, I stepped out of the shack for a couple hours and returned to find the unit was shut off. Everything else in the shack was still on and operating (computers, exciter rig, etc.). It was impossible to power on, so I removed the fuse block and checked. Both fuses check OK with DMM (I am operating on 115 VAC so fuses are 12a). There is power thru the power cable. I can't access any fault information since I cannot power it up. I don't seem to have a schematic nor can I find one online to check for other fuses, etc. (Anybody have one, or a link?) Suggestions? If possible I would like to avoid the lengthy shipping / service delay and $100+ cost of UPS to return it yet again. Of course I am hoping it is something that can be field serviced. Elecraft Service has been notified, but it is still early in 6-land. Thanks! 73 Lyn, W0LEN __ 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 k9...@live.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
[Elecraft] KPA500 dead again
I have KPA500 s/n 3835 which I purchased along with a KAT500, factory assembled, last Summer. It soon died and was subsequently returned to Elecraft at the beginning of August for service, and several parts were replaced. One part was missing. The unit was received back from Elecraft at the end of August and has worked flawlessly since that time. They extended the warranty to cover the initial defects (thank you, Elecraft!). Today, after operating a few hours, I stepped out of the shack for a couple hours and returned to find the unit was shut off. Everything else in the shack was still on and operating (computers, exciter rig, etc.). It was impossible to power on, so I removed the fuse block and checked. Both fuses check OK with DMM (I am operating on 115 VAC so fuses are 12a). There is power thru the power cable. I can't access any fault information since I cannot power it up. I don't seem to have a schematic nor can I find one online to check for other fuses, etc. (Anybody have one, or a link?) Suggestions? If possible I would like to avoid the lengthy shipping / service delay and $100+ cost of UPS to return it yet again. Of course I am hoping it is something that can be field serviced. Elecraft Service has been notified, but it is still early in 6-land. Thanks! 73 Lyn, W0LEN __ 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
Re: [Elecraft] KPA500 dead?
Steve; It is 4:40 on a Friday. If you haven’t done so already, call Customer Support NOW! This is not good. My suspicion is circuitry on the PA sandwich, possibly the input network. - Jack, W6FB Elecraft Engineering > On Jul 28, 2017, at 3:25 PM, Steve Lund wrote: > > It appears that my KPA500 has failed. It has a permanent "PA DISS" on all > bands. Just before that fault it smelt like wire insulation was burning (no > smoke). It has this condition on 160 - 6m. The fans seem to be running fine > and the PA temp was 50C. I've run the KPA500 on JT65/MSK144/FT8 for over a > month on 6m without a problem. > > I was using the amp on 6m with 400w out (about all I can get on that band > with 110vac). I had just finished a QSO on FT8. I can only get about 50w > out before the "PA DISS" occurs. > > I've opened the top cover and see no obvious damage. Are there any other > checks before sending it back to Elecraft? > > Thanks, > Steve, K6UM > __ > 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 jackbrin...@me.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
[Elecraft] KPA500 dead?
It appears that my KPA500 has failed. It has a permanent "PA DISS" on all bands. Just before that fault it smelt like wire insulation was burning (no smoke). It has this condition on 160 - 6m. The fans seem to be running fine and the PA temp was 50C. I've run the KPA500 on JT65/MSK144/FT8 for over a month on 6m without a problem. I was using the amp on 6m with 400w out (about all I can get on that band with 110vac). I had just finished a QSO on FT8. I can only get about 50w out before the "PA DISS" occurs. I've opened the top cover and see no obvious damage. Are there any other checks before sending it back to Elecraft? Thanks, Steve, K6UM __ 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
