P3SVGA
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Well, it arrived today and I went to work and installed it. Instructions
are clear and the installation went well. Board install took about 10 minutes or so. Most time spent making a new power cord for the P3 as the new adapter increases the drain by 200 mA and now exceeds the 500 allowed from the K3 12v out port. Now you must turn on the P3 manually, doesn't seem to be controlled by the K3 anymore. First impressions: Well, I have an old HP monitor, and it works well at 1268X1024. This provides a nice image, sharp and clear. P3 resolution is much better, but no additional features at this time so main advantage is bigger image. I think I like the "fill" under the trace, gives a better view of the wave shape being displayed. All in all, I like it, but I'm waiting now for more firmware features. Good job, Elecraft. ...bill nr4c ______________________________________________________________ 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 |
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Hi Bill,
Your comment about the 12V is the first I've heard that the P3 won't be able to be powered by the K3 12V output. Did the installation instructions specifically indicate that the P3 will require a separate power source or was that your decision? I can't find those instructions on the Elecraft webpage. 73, Mike K2MK
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It's in the instructions with the board. They did indicate the P3/SVGA
could be powered from the K3, but it might shut down suddenly if it drew too much power and the resettable fuse in the K3 would open. It's too easy to crimp another PP and add a "M" DC connector. The old P3 power cord goes in the 'portable' bag. So far, it's real nice but I think when a contest comes up, I'll add that real estate back to the computer for N1MM, and just use the old P3. Until they flush out the features, I need more area on the computer and not have two screens showing the same information. BUT IT'S REAL COOL!!!!! ...bill nr4c -----Original Message----- From: Mike K2MK [mailto:[hidden email]] Sent: Monday, March 12, 2012 7:54 PM To: [hidden email] Subject: Re: [Elecraft] P3SVGA Hi Bill, Your comment about the 12V is the first I've heard that the P3 won't be able to be powered by the K3 12V output. Did the installation instructions specifically indicate that the P3 will require a separate power source or was that your decision? I can't find those instructions on the Elecraft webpage. 73, Mike K2MK nr4c wrote > > Well, it arrived today and I went to work and installed it. Instructions > are clear and the installation went well. Board install took about 10 > minutes or so. Most time spent making a new power cord for the P3 as the > new adapter increases the drain by 200 mA and now exceeds the 500 allowed > from the K3 12v out port. Now you must turn on the P3 manually, doesn't > seem to be controlled by the K3 anymore. > > First impressions: Well, I have an old HP monitor, and it works well at > 1268X1024. This provides a nice image, sharp and clear. P3 resolution is > much better, but no additional features at this time so main advantage is > bigger image. I think I like the "fill" under the trace, gives a better > view of the wave shape being displayed. > > All in all, I like it, but I'm waiting now for more firmware features. > > Good job, Elecraft. > > ...bill nr4c > -- View this message in context: http://elecraft.365791.n2.nabble.com/P3SVGA-tp7366923p7367189.html Sent from the Elecraft mailing list archive at 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 ______________________________________________________________ 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 |
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I can confirm that the instructions are correct, that the P3 will
eventually power down if powered from the K3's aux power feed. I checked all that out earlier. Takes about 45 minutes for the thermal self-resetting fuse to trip. AND YES! It's real cool!!! 73, matt W6NIA On Mon, 12 Mar 2012 20:08:34 -0400, you wrote: >It's in the instructions with the board. They did indicate the P3/SVGA >could be powered from the K3, but it might shut down suddenly if it drew too >much power and the resettable fuse in the K3 would open. It's too easy to >crimp another PP and add a "M" DC connector. The old P3 power cord goes in >the 'portable' bag. > >So far, it's real nice but I think when a contest comes up, I'll add that >real estate back to the computer for N1MM, and just use the old P3. Until >they flush out the features, I need more area on the computer and not have >two screens showing the same information. > >BUT IT'S REAL COOL!!!!! > >...bill nr4c > >-----Original Message----- >From: Mike K2MK [mailto:[hidden email]] >Sent: Monday, March 12, 2012 7:54 PM >To: [hidden email] >Subject: Re: [Elecraft] P3SVGA > >Hi Bill, > >Your comment about the 12V is the first I've heard that the P3 won't be able >to be powered by the K3 12V output. Did the installation instructions >specifically indicate that the P3 will require a separate power source or >was that your decision? I can't find those instructions on the Elecraft >webpage. > >73, >Mike K2MK > > > >nr4c wrote >> >> Well, it arrived today and I went to work and installed it. Instructions >> are clear and the installation went well. Board install took about 10 >> minutes or so. Most time spent making a new power cord for the P3 as the >> new adapter increases the drain by 200 mA and now exceeds the 500 allowed >> from the K3 12v out port. Now you must turn on the P3 manually, doesn't >> seem to be controlled by the K3 anymore. >> >> First impressions: Well, I have an old HP monitor, and it works well at >> 1268X1024. This provides a nice image, sharp and clear. P3 resolution is >> much better, but no additional features at this time so main advantage is >> bigger image. I think I like the "fill" under the trace, gives a better >> view of the wave shape being displayed. >> >> All in all, I like it, but I'm waiting now for more firmware features. >> >> Good job, Elecraft. >> >> ...bill nr4c >> 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 |
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In reply to this post by Nr4c
Hi Bill,
Thanks for the information. I haven't received my shipping notice yet but I'd thought I'd get prepared. I found a 12V, 1.25 amp wall wart in the junk box that seems to work well with the P3 (less the SVGA card) so I'm hoping that does the trick when I add the card. 73, Mike K2MK
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I had a APP splitter under the table, so I used that to power the P3,
but the simplest would be to split off a pigtail from the APP connector at the back of the K3, and use it to power the P3. And, besides, this gives me a 12 volt line to power my LED light bar that mounts on the top front screws of the K3, and illuminates the front panel for operations like Field Day after dark. ...bill nr4c On Tue, 13 Mar 2012 07:06:23 -0700 (PDT), Mike K2MK wrote: > Hi Bill, > > Thanks for the information. I haven't received my shipping notice yet > but > I'd thought I'd get prepared. I found a 12V, 1.25 amp wall wart in > the junk > box that seems to work well with the P3 (less the SVGA card) so I'm > hoping > that does the trick when I add the card. > > 73, > Mike K2MK > > > nr4c wrote >> >> It's in the instructions with the board. They did indicate the >> P3/SVGA >> could be powered from the K3, but it might shut down suddenly if it >> drew >> too >> much power and the resettable fuse in the K3 would open. It's too >> easy to >> crimp another PP and add a "M" DC connector. The old P3 power cord >> goes >> in >> the 'portable' bag. >> >> So far, it's real nice but I think when a contest comes up, I'll add >> that >> real estate back to the computer for N1MM, and just use the old P3. >> Until >> they flush out the features, I need more area on the computer and >> not have >> two screens showing the same information. >> >> BUT IT'S REAL COOL!!!!! >> >> ...bill nr4c >> >> -----Original Message----- >> From: Mike K2MK [mailto:k2mk@] >> Sent: Monday, March 12, 2012 7:54 PM >> To: elecraft@.qth >> Subject: Re: [Elecraft] P3SVGA >> >> Hi Bill, >> >> Your comment about the 12V is the first I've heard that the P3 won't >> be >> able >> to be powered by the K3 12V output. Did the installation >> instructions >> specifically indicate that the P3 will require a separate power >> source or >> was that your decision? I can't find those instructions on the >> Elecraft >> webpage. >> >> 73, >> Mike K2MK >> > > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/P3SVGA-tp7366923p7368566.html > Sent from the Elecraft mailing list archive at 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 ______________________________________________________________ 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 |
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In reply to this post by Nr4c
Hi Bill,
We're going to start shipping a 6' 2.1MM power cable with every P3SVGA board ordered. The other end of the cable is bare and can be used to connect the P3 directly to your 12V mains. This should start by tomorrow or the next day. If your SVGA hasn't shipped yet, there'll be one in the box. Anyone who has already received their SVGA board can simply contact the factory and we'll send one out. 73, Paul (n6hz)
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Hi Paul,
I'm curious about circuit protection. If I connect this cable directly to my 35 amp 12V power supply is there any over current protection within the P3? I understand that the cable itself might go up in smoke but at the present time I'm only really worried about the P3. 73, Mike K2MK
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I connected mine to a 1 amp fuse position in my power pole strip.
Am going to look around for or build a power pole strip controlled by the position where I plug in to power my K3. That way the peripherals come on when I power up the K3. For the moment, just pushing the power button. 73, tom n4zpt On 3/14/2012 4:52 PM, Mike K2MK wrote: > Hi Paul, > > I'm curious about circuit protection. If I connect this cable directly to my > 35 amp 12V power supply is there any over current protection within the P3? > I understand that the cable itself might go up in smoke but at the present > time I'm only really worried about the P3. > > 73, > Mike K2MK > > > > Paul Saffren N6HZ wrote >> >> Hi Bill, >> >> We're going to start shipping a 6' 2.1MM power cable with every P3SVGA >> board ordered. The other end of the cable is bare and can be used to >> connect the P3 directly to your 12V mains. This should start by tomorrow >> or the next day. If your SVGA hasn't shipped yet, there'll be one in the >> box. Anyone who has already received their SVGA board can simply contact >> the factory and we'll send one out. >> >> 73, >> >> Paul (n6hz) >> > > > -- > View this message in context: http://elecraft.365791.n2.nabble.com/P3SVGA-tp7366923p7373339.html > Sent from the Elecraft mailing list archive at 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 > > ______________________________________________________________ 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 |
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In reply to this post by Mike K2MK
Hi Mike,
The 12 DC input to the P3 is connected internally to two DC/DC converters. These both have over current protection and limit at less than 1/2 amp each. Probably worst case is 1 amp. Of course if the cable itself shorts out or the regulators somehow short at their inputs we would exceed that. Certainly putting an external fuse inline with the P3 power supply wouldn't hurt. 73, Paul
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