P3 to video
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I've been using a P3 with my K3 with a video display for several years.
I'm planning to purchase a K3S and would be willing to buy a second P3 if I could figure out a way to combine the output of the two P3s on one screen, either horizontally or vertically, for simultaneous viewing. Has anyone been successful in doing this? Not keen on having two VGA monitors plus my computer monitor due to limited desk space. Thanks and 73, Dennis N7DH/1, Kittery Point, Maine MM/N7DH, Dollar, Scotland ______________________________________________________________ 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] |
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Dennis, I use a Samsung display that has 2 HDMI inputs and allows the monitor to display 2 inputs side by side. You may even be able to find a monitor with 2 VGA inputs that supports PIP. VGA to HDMI convertor cables are plentiful as well.
The secret is a 2-input display that support PIP. Mine is a current Samsung 28” 4K display and I run the Mac on one side and the Windows 10 NUC on the other, Works well. Michael Blake [hidden email] <mailto:[hidden email]> > On May 11, 2018, at 3:58 PM, Dennis L. Haarsager <[hidden email]> wrote: > > I've been using a P3 with my K3 with a video display for several years. > I'm planning to purchase a K3S and would be willing to buy a second P3 if I > could figure out a way to combine the output of the two P3s on one screen, > either horizontally or vertically, for simultaneous viewing. Has anyone > been successful in doing this? Not keen on having two VGA monitors plus my > computer monitor due to limited desk space. > > Thanks and 73, > Dennis > N7DH/1, Kittery Point, Maine > MM/N7DH, Dollar, Scotland > ______________________________________________________________ > 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] |
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In reply to this post by Dennis L. Haarsager
Monitor consolidation gizmos:
http://www.networktechinc.com/multiviewer.html A company I used to work for was happy with this vendor. I have no idea what their RFI footprint might be like, it wasn't a concern there. Rob Neal [hidden email] > On May 11, 2018, at 3:58 PM, Dennis L. Haarsager <[hidden email]> wrote: > > I've been using a P3 with my K3 with a video display for several years. > I'm planning to purchase a K3S and would be willing to buy a second P3 if I > could figure out a way to combine the output of the two P3s on one screen, > either horizontally or vertically, for simultaneous viewing. Has anyone > been successful in doing this? Not keen on having two VGA monitors plus my > computer monitor due to limited desk space. ______________________________________________________________ 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] |
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In reply to this post by Michael Blake
Great idea, Michael. But with one important possible gotcha --
virtually all of the power supplies for monitors like this are switch-mode types, and almost all generate RF noise. Several years ago, we were lucky to identify several Samsung models that run on a nominal 14VDC, and that work fine on the 12-14VDC that most of us have in our shacks (or on older linear 12V wall warts). Most newer models run at higher DC voltage, so to kill the noise they generate, we much find a suitable linear power supply for that voltage. BTW -- someone gave me a Samsung with touch controls because it was an RFI nightmare -- the monitor itself generated lots of noise AND the display went nuts in the presence of RF. 73, Jim K9YC On 5/11/2018 1:05 PM, Michael Blake wrote: > Dennis, I use a Samsung display that has 2 HDMI inputs and allows the monitor to display 2 inputs side by side. You may even be able to find a monitor with 2 VGA inputs that supports PIP. VGA to HDMI convertor cables are plentiful as well. > > The secret is a 2-input display that support PIP. Mine is a current Samsung 28” 4K display and I run the Mac on one side and the Windows 10 NUC on the other, Works well. ______________________________________________________________ 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] |
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Jim, I have two Samsung monitors. One is a 23” 1920x1080 with one VGA and one HDMI input and the other is the 28” 4K display with one Displayport and two HDMI inputs. Both have switch mode power supplies and I have never been able to identify either as a source of noise on my Flex 5000, Flex 3000, FLEX 6300, SunSDR2 Pro, Sun SDR2 NANO, QX1R, KX3 or K3s.
I have been quite fortunate in this regard as they have both served me well. Michael Blake [hidden email] <mailto:[hidden email]> > On May 11, 2018, at 4:44 PM, Jim Brown <[hidden email]> wrote: > > Great idea, Michael. But with one important possible gotcha -- virtually all of the power supplies for monitors like this are switch-mode types, and almost all generate RF noise. Several years ago, we were lucky to identify several Samsung models that run on a nominal 14VDC, and that work fine on the 12-14VDC that most of us have in our shacks (or on older linear 12V wall warts). Most newer models run at higher DC voltage, so to kill the noise they generate, we much find a suitable linear power supply for that voltage. > > BTW -- someone gave me a Samsung with touch controls because it was an RFI nightmare -- the monitor itself generated lots of noise AND the display went nuts in the presence of RF. > > 73, Jim K9YC > > On 5/11/2018 1:05 PM, Michael Blake wrote: >> Dennis, I use a Samsung display that has 2 HDMI inputs and allows the monitor to display 2 inputs side by side. You may even be able to find a monitor with 2 VGA inputs that supports PIP. VGA to HDMI convertor cables are plentiful as well. >> >> The secret is a 2-input display that support PIP. Mine is a current Samsung 28” 4K display and I run the Mac on one side and the Windows 10 NUC on the other, Works well. > > > ______________________________________________________________ > 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] |
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In reply to this post by Jim Brown-10
Worse even is that MOST newer monitors now have INTERNAL power supplies. They are switched, multi-voltage output, and almost impossible to hack....
I was going to hack my monitors and put a linear dc supply before the transformer/regulators.... no joy. Only way to make the monitors DC only in my case is to find the various voltage output rails and cut in individual DC supplies in and completely hack the existing PS circuitry out of the design.... not at all a trivial exercise. I will pick monitors better and have the DC supply plan in place for the next monitor go around.... <frown> Same frustration in trying to hack most laptop power supplies.... 18.5 vdc nominal, but with special circutry that cause the battery/laptop/charger to talk.... no talk, and the PS won't charge the battery.... yadda yadda... Best case scenario is to just power the laptop directly from battery pins... BUT you STILL have to then trick the laptop into recognizing the DC PS as a battery. Dell won't even think about talking to me about the battery pinout and the power good logic. Sent from my Verizon, Samsung Galaxy smartphone -------- Original message --------From: Jim Brown <[hidden email]> Date: 5/11/18 15:44 (GMT-06:00) To: [hidden email] Subject: Re: [Elecraft] P3 to video Great idea, Michael. But with one important possible gotcha -- virtually all of the power supplies for monitors like this are switch-mode types, and almost all generate RF noise. Several years ago, we were lucky to identify several Samsung models that run on a nominal 14VDC, and that work fine on the 12-14VDC that most of us have in our shacks (or on older linear 12V wall warts). Most newer models run at higher DC voltage, so to kill the noise they generate, we much find a suitable linear power supply for that voltage. BTW -- someone gave me a Samsung with touch controls because it was an RFI nightmare -- the monitor itself generated lots of noise AND the display went nuts in the presence of RF. 73, Jim K9YC On 5/11/2018 1:05 PM, Michael Blake wrote: > Dennis, I use a Samsung display that has 2 HDMI inputs and allows the monitor to display 2 inputs side by side. You may even be able to find a monitor with 2 VGA inputs that supports PIP. VGA to HDMI convertor cables are plentiful as well. > > The secret is a 2-input display that support PIP. Mine is a current Samsung 28” 4K display and I run the Mac on one side and the Windows 10 NUC on the other, Works well. ______________________________________________________________ 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] |
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In reply to this post by Michael Blake
On 5/11/2018 2:01 PM, Michael Blake wrote:
> Both have switch mode power supplies and I have never been able to > identify either as a source of noise on my Flex 5000, Flex 3000, FLEX > 6300, SunSDR2 Pro, Sun SDR2 NANO, QX1R, KX3 or K3s. > That doesn't mean that they're not noisy -- most of us are surrounded by dozens of noise sources that blend together and make any single source hard to hear. Your monitors could be noisy, but the rest of the noise covers it up. Have you probed around them with a portable AM radio tuned to a clear spot near the high end of the AM broadcast band? I use a Kenwood TH-F6A talkie, which covers from below the AM band to nearly 1 GHz. All of us can do ourselves a favor by implementing a "search and destroy" mission for RF noise sources. These two links provide a lot of practical advice on how to do it. http://k9yc.com/KillingReceiveNoise.pdf http://k9yc.com/KillingRXNoiseVisalia.pdf 73, Jim K9YC ______________________________________________________________ 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] |
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