Re: [Elecraft] P3 Failure, and question
Hi Ben, Thank you for the information!!! I will look to see if that cap is wrong! 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 3:37 PM, w4sc wrote: I had a similar problem. I purchased a P3 kit in 2015, assembled, and it worked well. The firmware as received, was a rev behind. Trying to upgrade via the normal method, was unable to accomplish. Trying to force an upgrade, was unsuccessful. Had to return for warranty repair. The EEPROM was corrupted. All was OK until about 4 years ago, the P3, occasionally, would not boot up. I received some guidance from one of the engineers, to check a capacitor in the P3 power supply. If it was a tantalum (10 uF I believe), it was the incorrect value, and to change to 0.1uf (1206 sized). After the capacitor change, no more powerup issues. I believe there was a supply sequencing issue. I am looking for the details, and when found, I will post. Ben W4SC Sent from Mail for Windows 10 __ 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...@nk7z.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] P3 Failure, and question
I had a similar problem. I purchased a P3 kit in 2015, assembled, and it worked well. The firmware as received, was a rev behind. Trying to upgrade via the normal method, was unable to accomplish. Trying to force an upgrade, was unsuccessful. Had to return for warranty repair. The EEPROM was corrupted. All was OK until about 4 years ago, the P3, occasionally, would not boot up. I received some guidance from one of the engineers, to check a capacitor in the P3 power supply. If it was a tantalum (10 uF I believe), it was the incorrect value, and to change to 0.1uf (1206 sized). After the capacitor change, no more powerup issues. I believe there was a supply sequencing issue. I am looking for the details, and when found, I will post. Ben W4SC Sent from Mail for Windows 10 __ 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] K3 cw rise time
Tony, >...8ms, I think, which is unnecessarily long. Just yesterday, Rob Sherwood gave a Zoom presentation to the local SLAARC titled "Transmitter Spectral Purity." He spoke at length about the evils of fast rise times and cited the optimal rise time as between 6 and 8 ms. The Elecraft K3 line was described as one of the best behaved CW rigs, with a rise time of 6ms Yaesu rigs were denounced for being user-configurable from 1ms to 8ms, giving owners an opportunity to litter the bands with shorter times and key clicks. Slightly over 60 minutes long: https://youtu.be/EKCKkV5Nowo -larry (K8UT) -- Original Message -- From: "Tony - KM0O" To: elecraft@mailman.qth.net Sent: 2021-04-12 14:34:16 Subject: [Elecraft] K3 cw rise time Hello, This subject came up in a recent conversation, and I had to admit that I do not know the cw rise time of my K3. It's s/n 444, and does not have the cw rise time mod that elecraft sells. The firmware is the current version. I read somewhere that the rise time was decreased in a previous firmware issue, but I don't know if that's true. It was originally 8ms, I think, which is unnecessarily long. Can anyone help? 73, Tony KM0O -- 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: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 k...@charter.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] P3 Failure and such
On 4/12/2021 12:19 PM, Dave Cole wrote: In my case, I use the K3 power switch to shut down the station rig and P3. That's I do, sort of -- I use my #1 K3's 12V accessory output to drive a relay that turns off everything in my station except the other radio. The K3s are fed with short, fat copper from a 100Ah LiFePO4 battery; everything else runs from a 100Ah SLA battery. That SLA's load includes antenna switching, P3/SVGAs, three video monitors, two LP100A power monitors, and LED strips that are task-lighting for the operating position. Batteries are float charged using re-purposed Thinkpad power supplies with Genasun solar charge regulators. 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] P3 Failure and such
In my case, I use the K3 power switch to shut down the station rig and P3. Thanks! 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 11:55 AM, Bob McGraw K4TAX wrote: I’ve always found and was taught that one should not just dump the power on station shut-down. This could be the cause of many mysterious and lucid operation Likewise; on power up: (A). Power supply on first (B). Transceiver on next (C). P3 on if not powered from the K3 (D). KAT500 on if not powered from the K3 Shutdown the items in reverse order. NEVER just dump the power as there is a Power Down Imminent (PDI) circuit which saves data and then correctly shuts down the systems. 73 Bob, K4TAX Sent from my iPhone __ 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...@nk7z.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] K3 cw rise time
I still think Drake 4-line had the best-sounding CW note. Has anyone measured it? -de John NI0K Jim Brown wrote on 4/12/2021 1:47 PM: On 4/12/2021 11:34 AM, Tony - KM0O wrote: I read somewhere that the rise time was decreased in a previous firmware issue, but I don't know if that's true. Beginning with the earliest K3s, all Elecraft rigs use carefully shaped keying to minimize clicks while maximizing readability. Wayne describes it as a "sigmoidal" shape, describing the math function he used. It's keying bandwidth as compared to other rigs can been seen here. http://k9yc.com/TXNoise.pdf (ARRL Lab data) and here http://k9yc.com/P3_Spectrum_Measurements.pdf (My data) 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 jasimm...@pinewooddata.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] P3 Failure and such
I’ve always found and was taught that one should not just dump the power on station shut-down. This could be the cause of many mysterious and lucid operation Likewise; on power up: (A). Power supply on first (B). Transceiver on next (C). P3 on if not powered from the K3 (D). KAT500 on if not powered from the K3 Shutdown the items in reverse order. NEVER just dump the power as there is a Power Down Imminent (PDI) circuit which saves data and then correctly shuts down the systems. 73 Bob, K4TAX Sent from my iPhone __ 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] K3 cw rise time
On 4/12/2021 11:34 AM, Tony - KM0O wrote: I read somewhere that the rise time was decreased in a previous firmware issue, but I don't know if that's true. Beginning with the earliest K3s, all Elecraft rigs use carefully shaped keying to minimize clicks while maximizing readability. Wayne describes it as a "sigmoidal" shape, describing the math function he used. It's keying bandwidth as compared to other rigs can been seen here. http://k9yc.com/TXNoise.pdf (ARRL Lab data) and here http://k9yc.com/P3_Spectrum_Measurements.pdf (My data) 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
[Elecraft] K3 cw rise time
Hello, This subject came up in a recent conversation, and I had to admit that I do not know the cw rise time of my K3. It's s/n 444, and does not have the cw rise time mod that elecraft sells. The firmware is the current version. I read somewhere that the rise time was decreased in a previous firmware issue, but I don't know if that's true. It was originally 8ms, I think, which is unnecessarily long. Can anyone help? 73, Tony KM0O -- 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: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] P3 Failure, and question
I do not. The repair invoice from Elecraft only indicated a faulty I/O board which was replaced. 73 Howard/WX7HS > On Apr 12, 2021, at 09:35, Dave New wrote: > > Do you know just what failed on the I/O board? Was it possibly due to > static discharge? > > I tend to leave an antenna connected, except during active weather, but > curious if there is something sensitive in the P3 I/O area that can fail > easily from a surge, like the old RS-232 circuitry in the original K3. > > Thanks, > > -- Dave, N8SBE > > Quoting Howard Saxion via Elecraft : > >> I had a similar problem with my P3 with SVGA. I had to cycle through the >> on-off switch a few times before it would fully power up. Once powered up, >> everything was working and stable. I tried reseating the ribbon cables but >> that had no effect. >> >> I contacted Elecraft technical support and they had me try a few things but >> that did not solve the problem. I sent it to Elecraft and it turned out that >> the I/O board was faulty. The repair cost was approximately $200 for a new >> board and labor. >> >> 73 >> Howard/WX7HS >> On Apr 12, 2021, at 06:05, Dave Cole wrote: >>> >>> Rick, >>> >>> Thank you! I appreciate the datapoint in this. I was just looking over >>> the schematic and came to the same conclusion... It looks like a backlight >>> problem to me as well... I tried to find a datasheet on teh 4538 IC that >>> appears to control it, but alas, nope. I got mine to come back on by power >>> cycling it as well... >>> >>> Hopefully someone has actually fixed this, and knows which cap... >>> >>> 73, and thanks, >>> Dave (NK7Z) >>> https://www.nk7z.net >>> ARRL Volunteer Examiner >>> ARRL Technical Specialist, RFI >>> ARRL Asst. Director, NW Division, Technical Resources >>> On 4/12/21 5:27 AM, Rick Stanback wrote: My P3 does the same thing. If i keep cycling power it eventually comes on and works. I suspect there is a bad capacitor in the LCD backlight power. I have not actually looking into it yet. >>> >>> __ >>> 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 howardsax...@mac.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.htmlMessage >> delivered to n8...@arrl.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 howardsax...@mac.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] Elecraft job openings. Test/ Repair tech, customer support tech.
One typo in my email addresses below. The correct address for submitting you information are: h...@elecraft.com , and also cc: e...@elecraft.com (I had an extraneous space in the hr@.. address below.) Eric elecraft.com _..._ > On Apr 12, 2021, at 9:45 AM, Eric Swartz wrote: > > Hi, > > We have openings for two different technical positions at Elecraft! > > 1. Technician position for our product test group. > - This position requires good analog and digital skills with debug and repair > capability to the component level. Involves use of Spectrum Analyzers, > Oscilloscopes etc. and specialized computer software used for testing etc. > Good understanding of radio transmitter, amplifier and receiver operation at > the schematic and block diagram levels is also a plus. > - This is a full time or part time position working at our Watsonville, CA > facility. > > 2. Customer Support > This position will be supporting customer questions via phone calls and > emails on our current products. Good social skills and detailed operating > experience with our K3 or K3s, KX line, Amplifiers etc is a plus. Should also > be familiar with reading and understanding schematics, debugging customer > failures over the phone and via email etc. > This position can be full or part time, working from our Watsonville > facility, and possibly from home. > > If you are interested, please email your contact information and > resume/experience to hr@ elecraft.com, and cc: eric@ elecraft.com so I can > track applicants too. > > 73, > Eric > elecraft.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] Elecraft job openings. Test/ Repair tech, customer support tech.
Hi, We have openings for two different technical positions at Elecraft! 1. Technician position for our product test group. - This position requires good analog and digital skills with debug and repair capability to the component level. Involves use of Spectrum Analyzers, Oscilloscopes etc. and specialized computer software used for testing etc. Good understanding of radio transmitter, amplifier and receiver operation at the schematic and block diagram levels is also a plus. - This is a full time or part time position working at our Watsonville, CA facility. 2. Customer Support This position will be supporting customer questions via phone calls and emails on our current products. Good social skills and detailed operating experience with our K3 or K3s, KX line, Amplifiers etc is a plus. Should also be familiar with reading and understanding schematics, debugging customer failures over the phone and via email etc. This position can be full or part time, working from our Watsonville facility, and possibly from home. If you are interested, please email your contact information and resume/experience to hr@ elecraft.com, and cc: eric@ elecraft.com so I can track applicants too. 73, Eric elecraft.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] P3 Failure, and question
Do you know just what failed on the I/O board? Was it possibly due to static discharge? I tend to leave an antenna connected, except during active weather, but curious if there is something sensitive in the P3 I/O area that can fail easily from a surge, like the old RS-232 circuitry in the original K3. Thanks, -- Dave, N8SBE Quoting Howard Saxion via Elecraft : I had a similar problem with my P3 with SVGA. I had to cycle through the on-off switch a few times before it would fully power up. Once powered up, everything was working and stable. I tried reseating the ribbon cables but that had no effect. I contacted Elecraft technical support and they had me try a few things but that did not solve the problem. I sent it to Elecraft and it turned out that the I/O board was faulty. The repair cost was approximately $200 for a new board and labor. 73 Howard/WX7HS On Apr 12, 2021, at 06:05, Dave Cole wrote: Rick, Thank you! I appreciate the datapoint in this. I was just looking over the schematic and came to the same conclusion... It looks like a backlight problem to me as well... I tried to find a datasheet on teh 4538 IC that appears to control it, but alas, nope. I got mine to come back on by power cycling it as well... Hopefully someone has actually fixed this, and knows which cap... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 5:27 AM, Rick Stanback wrote: My P3 does the same thing. If i keep cycling power it eventually comes on and works. I suspect there is a bad capacitor in the LCD backlight power. I have not actually looking into it yet. __ 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 howardsax...@mac.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.htmlMessage delivered to n8...@arrl.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
[Elecraft] 40 meter net 4-11
Thanks to all my relay stations. Very few signals on 40 meters. WM6P STEVE GA K3S NETCONTROL WB9JNZ ERIC IL K3 K1NW BRIAN RI K3 WY3T TIM FL K3S K8NU CARL OH FTDX101 NC0JW JIM CO KX3 K2VJK VERN NY K3 N2AQR JOHN NY K2 AE6JV BILL NH K3 KO4DXQ BOB TN IC7300 K5PD PETE TX K3 K4HYJ HANK GA KX3 __ 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] P3 Failure, and question
Thanks Howard, I'll call you later today... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 7:05 AM, Howard Saxion wrote: I had a similar problem with my P3 with SVGA. I had to cycle through the on-off switch a few times before it would fully power up. Once powered up, everything was working and stable. I tried reseating the ribbon cables but that had no effect. I contacted Elecraft technical support and they had me try a few things but that did not solve the problem. I sent it to Elecraft and it turned out that the I/O board was faulty. The repair cost was approximately $200 for a new board and labor. 73 Howard/WX7HS On Apr 12, 2021, at 06:05, Dave Cole wrote: Rick, Thank you! I appreciate the datapoint in this. I was just looking over the schematic and came to the same conclusion... It looks like a backlight problem to me as well... I tried to find a datasheet on teh 4538 IC that appears to control it, but alas, nope. I got mine to come back on by power cycling it as well... Hopefully someone has actually fixed this, and knows which cap... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 5:27 AM, Rick Stanback wrote: My P3 does the same thing. If i keep cycling power it eventually comes on and works. I suspect there is a bad capacitor in the LCD backlight power. I have not actually looking into it yet. __ 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 howardsax...@mac.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] P3 Failure, and question
Hi Dave New, It does help, and thank you... Mine has come back to life as well, (power cycling it), and I am worried about turning it off now as well... I will get an RSA from Elecraft and send it in... I'll report back to the list what they find, and how long it took to get repaired. If you discover the issue, please let me know if you would! I won't be sending mine back tomorrow, but sooner than later. Also, THANK YOU again for the information. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 6:39 AM, Dave New wrote: I've been experiencing intermittent failures of the internal display, as well as loss of at least one setting (Track/Fix). I've been leaving the K3s/P3 powered on continuously, but recently started turning them off, to save some 'always on' energy while trying to figure out why our house is running about 1200 watts continuously. So, when powering on the combination (the P3 is set to power on with the K3s power), very nearly always now, the internal display fails to come on, but the SVGA display always works. Normally, cycling the power switch on the P3 recovers the internal display, but just yesterday, I had to cycle the power several times before it came up. I'm now leaving things powered on, until I can troubleshoot what the issue is. I did go as far as looking in the P3 manual to see if there is a coin cell battery in it, that might need replacing, but that is apparently not so. I'm concerned about the loss of settings, which may point to a corrupted EEPROM. Reflashing the P3 hasn't fixed this, and so far, I've not tried a 'factory reset' on the P3, which would lose all my settings. Hope that helps, -- Dave, N8SBE Quoting Dave Cole : Rick, A further thought on this... Next time your P3 fails, can you try and grab an image from it using the utility? I just thought of that, mine will not grab an image, when it is failed, so it is probably not the backlight on mine. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 6:03 AM, Dave Cole wrote: Rick, Thank you! I appreciate the datapoint in this. I was just looking over the schematic and came to the same conclusion... It looks like a backlight problem to me as well... I tried to find a datasheet on teh 4538 IC that appears to control it, but alas, nope. I got mine to come back on by power cycling it as well... Hopefully someone has actually fixed this, and knows which cap... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 5:27 AM, Rick Stanback wrote: My P3 does the same thing. If i keep cycling power it eventually comes on and works. I suspect there is a bad capacitor in the LCD backlight power. I have not actually looking into it yet. __ 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...@nk7z.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.htmlMessage delivered to n8...@arrl.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 d...@nk7z.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
[Elecraft] Elecraft PA via Generator Power?
One of the first tests I did after the dual-fuel conversion of my Honda gen was with the KPA-500. Worked flawlessly, and I highly recommend the conversion. It only takes minutes: https://ae5x.blogspot.com/2020/06/propane-conversion-of-honda-eu2000i.html 73, John AE5X __ 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] P3 Failure, and question
I had a similar problem with my P3 with SVGA. I had to cycle through the on-off switch a few times before it would fully power up. Once powered up, everything was working and stable. I tried reseating the ribbon cables but that had no effect. I contacted Elecraft technical support and they had me try a few things but that did not solve the problem. I sent it to Elecraft and it turned out that the I/O board was faulty. The repair cost was approximately $200 for a new board and labor. 73 Howard/WX7HS > On Apr 12, 2021, at 06:05, Dave Cole wrote: > > Rick, > > Thank you! I appreciate the datapoint in this. I was just looking over the > schematic and came to the same conclusion... It looks like a backlight > problem to me as well... I tried to find a datasheet on teh 4538 IC that > appears to control it, but alas, nope. I got mine to come back on by power > cycling it as well... > > Hopefully someone has actually fixed this, and knows which cap... > > 73, and thanks, > Dave (NK7Z) > https://www.nk7z.net > ARRL Volunteer Examiner > ARRL Technical Specialist, RFI > ARRL Asst. Director, NW Division, Technical Resources > >> On 4/12/21 5:27 AM, Rick Stanback wrote: >> My P3 does the same thing. If i keep cycling power it eventually comes >> on and works. I suspect there is a bad capacitor in the LCD backlight >> power. I have not actually looking into it yet. > __ > 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 howardsax...@mac.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] P3 Failure, and question
I've been experiencing intermittent failures of the internal display, as well as loss of at least one setting (Track/Fix). I've been leaving the K3s/P3 powered on continuously, but recently started turning them off, to save some 'always on' energy while trying to figure out why our house is running about 1200 watts continuously. So, when powering on the combination (the P3 is set to power on with the K3s power), very nearly always now, the internal display fails to come on, but the SVGA display always works. Normally, cycling the power switch on the P3 recovers the internal display, but just yesterday, I had to cycle the power several times before it came up. I'm now leaving things powered on, until I can troubleshoot what the issue is. I did go as far as looking in the P3 manual to see if there is a coin cell battery in it, that might need replacing, but that is apparently not so. I'm concerned about the loss of settings, which may point to a corrupted EEPROM. Reflashing the P3 hasn't fixed this, and so far, I've not tried a 'factory reset' on the P3, which would lose all my settings. Hope that helps, -- Dave, N8SBE Quoting Dave Cole : Rick, A further thought on this... Next time your P3 fails, can you try and grab an image from it using the utility? I just thought of that, mine will not grab an image, when it is failed, so it is probably not the backlight on mine. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 6:03 AM, Dave Cole wrote: Rick, Thank you! I appreciate the datapoint in this. I was just looking over the schematic and came to the same conclusion... It looks like a backlight problem to me as well... I tried to find a datasheet on teh 4538 IC that appears to control it, but alas, nope. I got mine to come back on by power cycling it as well... Hopefully someone has actually fixed this, and knows which cap... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 5:27 AM, Rick Stanback wrote: My P3 does the same thing. If i keep cycling power it eventually comes on and works. I suspect there is a bad capacitor in the LCD backlight power. I have not actually looking into it yet. __ 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...@nk7z.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.htmlMessage delivered to n8...@arrl.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] P3 Failure, and question
Rick, A further thought on this... Next time your P3 fails, can you try and grab an image from it using the utility? I just thought of that, mine will not grab an image, when it is failed, so it is probably not the backlight on mine. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 6:03 AM, Dave Cole wrote: Rick, Thank you! I appreciate the datapoint in this. I was just looking over the schematic and came to the same conclusion... It looks like a backlight problem to me as well... I tried to find a datasheet on teh 4538 IC that appears to control it, but alas, nope. I got mine to come back on by power cycling it as well... Hopefully someone has actually fixed this, and knows which cap... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 5:27 AM, Rick Stanback wrote: My P3 does the same thing. If i keep cycling power it eventually comes on and works. I suspect there is a bad capacitor in the LCD backlight power. I have not actually looking into it yet. __ 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...@nk7z.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] P3 Failure, and question
Rick, Thank you! I appreciate the datapoint in this. I was just looking over the schematic and came to the same conclusion... It looks like a backlight problem to me as well... I tried to find a datasheet on teh 4538 IC that appears to control it, but alas, nope. I got mine to come back on by power cycling it as well... Hopefully someone has actually fixed this, and knows which cap... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 5:27 AM, Rick Stanback wrote: My P3 does the same thing. If i keep cycling power it eventually comes on and works. I suspect there is a bad capacitor in the LCD backlight power. I have not actually looking into it yet. __ 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] P3 Failure, and question
My P3 does the same thing. If i keep cycling power it eventually comes on and works. I suspect there is a bad capacitor in the LCD backlight power. I have not actually looking into it yet. -- "If you are not the lead dog, the scenary never changes" Rick Stanback N4WCQ On Mon, 2021-04-12 at 04:41 -0700, Dave Cole wrote: > A bit more data: > > 1. The (3 utility can talk to it. > 2. If I try and capture an image, it goes through the motions, but > no > image is captured. > 3. It accepts commands via a keyboard. > 4. A load from the last config file did not correct things. > 5. A full power off and on did not correct things. > > 73, and thanks, > Dave (NK7Z) > https://www.nk7z.net > ARRL Volunteer Examiner > ARRL Technical Specialist, RFI > ARRL Asst. Director, NW Division, Technical Resources > > On 4/12/21 4:27 AM, Dave Cole wrote: > > Hello, > > > > My P3 seems to have had a display failure. The SVGA is working, as > > I > > can control the K3 via macros fired at it via the keyboard input. > > It > > failed to light off once before, but that seemed a one off thing, > > not it > > seems permanent. > > > > Has anyone seen this before? If so, what was the cause? > > > __ > 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 r...@tripletry.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] P3 Failure, and question
A bit more data: 1. The (3 utility can talk to it. 2. If I try and capture an image, it goes through the motions, but no image is captured. 3. It accepts commands via a keyboard. 4. A load from the last config file did not correct things. 5. A full power off and on did not correct things. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/12/21 4:27 AM, Dave Cole wrote: Hello, My P3 seems to have had a display failure. The SVGA is working, as I can control the K3 via macros fired at it via the keyboard input. It failed to light off once before, but that seemed a one off thing, not it seems permanent. Has anyone seen this before? If so, what was the cause? __ 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] P3 Failur3, and question
Hello, My P3 seems to have had a display failure. The SVGA is working, as I can control the K3 via macros fired at it via the keyboard input. It failed to light off once before, but that seemed a one off thing, not it seems permanent. Has anyone seen this before? If so, what was the cause? -- 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources __ 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
