Re: [Elecraft] Looking for miniature 14-V power supply for travel use
Hi Wayne, I expect you are back by now. However it might still be of interest. I have been using laptop type supplies for this application. Light, small, cheap and some of them are relatively quiet. They will also fit in a small metal box. Recently I came across LED lighting supplies, 12V again and similar to laptops except they come with standard 2.1mm plugs. For quiet and off grid applications, I use LiPo batteries, 3 or 4 cell. For the KX3, 3 cells will do and can be re-charged with a cheap balance charger. I have a small one to hand, 20x40x100mm 2.2Ah and a 4AH 4 cell 20x50x120mm. My own application is powering portable microwave gear, but 12V is universal. Fusing is essential of course as these cells will happily deliver 60Amps. They have a reputation for danger if you miss-charge them. But people still fill up their cars with gasolene to go on holiday and that is much more dangerous. Mike -- View this message in context: http://elecraft.365791.n2.nabble.com/Looking-for-miniature-14-V-power-supply-for-travel-use-tp6547473p6592088.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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
The power supplies that typically come with external HD enclosures and external CD/DVD drives should fit the bill quite nicely if they're quiet enough, generally 12V at 2-2.5A. I've tried several, and havn't noticed any significant noise with any of the ones I've used. 73, Ross N4RP On 7/4/2011 5:23 PM, Wayne Burdick wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 -- FCC Section 97.313(a) “At all times, an amateur station must use the minimum transmitter power necessary to carry out the desired communications.” __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
Wayne : I have also had good luck with the CUPS supply that Randy mentioned from Morse Express / Milestone Technologies with both my K1 / K2 and i have never had any issues with noise. BTW It is only supplied with a 2 prong plug. Michael VE3WMB From: Wayne Burdick n...@elecraft.com Date: July 4, 2011 6:09:02 PM EDT To: Randy Moore wrmoor...@gmail.com Cc: Elecraft Reflector elecraft@mailman.qth.net Subject: Re: [Elecraft] Looking for miniature 14-V power supply for travel use Thanks, Randy. This is even smaller than the MFJ-4103. The web site indicates a noise problem without proper grounding. Have you found this to be an issue? They mention supplying a 2-pin standard power connector, which is *not* what you want if you're trying to get a good common ground back to the AC jack. Is that a typo -- i.e., do they actually supply a 3-pin AC plug? Thanks, Wayne N6KR On Jul 4, 2011, at 3:00 PM, Randy Moore wrote: Wayne, I've had good luck with this: http://www.mtechnologies.com/cup/ __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel, use
Look through your old laptop PC power supplies. They are typically 14-19 VDC with 1.5-2.2 A current supply capability. Some are clean, some are dirty, but they are generally quite small. I used to use one with my K2 at trade shows. Larry N8LP On 7/5/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote: Date: Mon, 4 Jul 2011 14:23:14 -0700 From: Wayne Burdickn...@elecraft.com Subject: [Elecraft] Looking for miniature 14-V power supply for travel use To: Elecraft Reflectorelecraft@mailman.qth.net Message-ID:90fa3334-f5d5-41d6-93f6-0bacd2c4a...@elecraft.com Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel, use
Looks like the LS25-15 model might be what Wayne (and I) would like, since it is adjustable from 13.5V to 15V at 1.7 A, whereas the LS25-12 is adjustable from 10.8V to 13.2V. These are speced at 120 mV ripple noise. Is that high? Thanks for posting this Michael. Chip On Tue, Jul 5, 2011 at 7:45 PM, N6MQL n6...@arrl.net wrote: Wayne, The following supply meets your requirements almost to the Tee. There are 3 to choose from. I have tested and used the second one in Professional broadcast off-line Video production as well as Audio recording. I have not heard noise from them that would cause an issue. Furthermore, I have used these with my KX1 and the K3 when having fun on vacation. Specs can be found at http://us.tdk-lambda.com Lambda - LS25-12 (LS35-12) - $16.50 ($18.25) Newark electronics - 3.1 X 5.0 X 1.1 (3.9 X 3.2 X 1.4) - 10.8V-13.2V @ 2.1A (3.0A) Lambda - HWS30-12/A - $54 Newark electronics - 1.24 X 3.23 X 3.74 9.6V - 14.4V @ 2.5A Now, if you really want to go crazy with this! (and I know some of you out there will) Lambda - PFE300S-12 - $250.00 Newark electronics - 2.4 X 0.5 X 4.6 9.6V - 14.4V @ 25A (YES 25A !) Have fun, and enjoy your holidays Michael N6MQL Message: 9 Date: Mon, 4 Jul 2011 14:23:14 -0700 From: Wayne Burdickn...@elecraft.com Subject: [Elecraft] Looking for miniature 14-V power supply for travel use To: Elecraft Reflectorelecraft@mailman.qth.net Message-ID:90fa3334-f5d5-41d6-93f6-0bacd2c4a...@elecraft.com Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR -- Michael Aretsky N6MQL __ 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 __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel, use
Have you looked at the one from Powerwerx ? http://www.powerwerx.com/batteries-chargers/powerwerx-30-amp-desktop-switching-power-supply-powerpoles.html 73, K1NR On Tue, 05 Jul 2011 17:45:01 -0700 N6MQL n6...@arrl.net wrote: Wayne, The following supply meets your requirements almost to the Tee. There are 3 to choose from. I have tested and used the second one in Professional broadcast off-line Video production as well as Audio recording. I have not heard noise from them that would cause an issue. Furthermore, I have used these with my KX1 and the K3 when having fun on vacation. Specs can be found at http://us.tdk-lambda.com Lambda - LS25-12 (LS35-12) - $16.50 ($18.25) Newark electronics - 3.1 X 5.0 X 1.1 (3.9 X 3.2 X 1.4) - 10.8V-13.2V @ 2.1A (3.0A) Lambda - HWS30-12/A - $54 Newark electronics - 1.24 X 3.23 X 3.74 9.6V - 14.4V @ 2.5A Now, if you really want to go crazy with this! (and I know some of you out there will) Lambda - PFE300S-12 - $250.00 Newark electronics - 2.4 X 0.5 X 4.6 9.6V - 14.4V @ 25A (YES 25A !) Have fun, and enjoy your holidays Michael N6MQL Message: 9 Date: Mon, 4 Jul 2011 14:23:14 -0700 From: Wayne Burdickn...@elecraft.com Subject: [Elecraft] Looking for miniature 14-V power supply for travel use To: Elecraft Reflectorelecraft@mailman.qth.net Message-ID:90fa3334-f5d5-41d6-93f6-0bacd2c4a...@elecraft.com Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR -- Michael Aretsky N6MQL __ 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 - Web mail provided by NuNet, Inc. The Premier National provider. http://www.nni.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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
I use one of these: http://www.gammaresearch.net/hps-1a.html 73, Nick N3WG On Jul 4, 2011 2:23 PM, Wayne Burdick n...@elecraft.com wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
Jameco has a lot of these. Not sure how quiet, but they are cheap enough that you could buy 2 or 3 and pick the best. Bob, N6CM On Mon, Jul 4, 2011 at 2:23 PM, Wayne Burdick n...@elecraft.com wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
Well, Chief Engineer Wayne, sounds to me like a good idea for a mini kit ! 73, Rick Dettinger K7MW On Jul 4, 2011, at 2:23 PM, Wayne Burdick wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
Yes, the HPS-1a is a great supply. But it's about twice the size and weight I'm looking for. A wall wart supply would be fine as long as it meets all of the criteria and is well-regulated. Wayne N6KR On Jul 4, 2011, at 2:27 PM, Nick Garner wrote: I use one of these: http://www.gammaresearch.net/hps-1a.html 73, Nick N3WG On Jul 4, 2011 2:23 PM, Wayne Burdick n...@elecraft.com wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
Can't roll our own in time for my vacation :) Wayne N6KR On Jul 4, 2011, at 2:39 PM, Rick Dettinger wrote: Well, Chief Engineer Wayne, sounds to me like a good idea for a mini kit ! 73, Rick Dettinger K7MW On Jul 4, 2011, at 2:23 PM, Wayne Burdick wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
I have used a MFJ-4103 with my K2 with good results. It's close to your desired form factor and was quiet on 20 meters (I haven't tried it on other bands). I also used it on 220V/50Hz in EU. Bob, N7XY On Jul 4, 2011, at 2:23 PM, Wayne Burdick wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 _ N7XY DX Cluster Node - telnet to n7xy.net, port 7300 __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
OK, but it would still make a great mini kit. Especially since there may not be an acceptable substitute. Rick K7MW On Jul 4, 2011, at 2:44 PM, Wayne Burdick wrote: Can't roll our own in time for my vacation :) Wayne N6KR On Jul 4, 2011, at 2:39 PM, Rick Dettinger wrote: Well, Chief Engineer Wayne, sounds to me like a good idea for a mini kit ! 73, Rick Dettinger K7MW On Jul 4, 2011, at 2:23 PM, Wayne Burdick wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
This one does look promising, Bob--thanks. I've also found some possible units at Jameco, which happens to be about a mile down the road (thank you, N6CM, for reminding me). Wayne N6KR On Jul 4, 2011, at 2:46 PM, Bob Nielsen wrote: I have used a MFJ-4103 with my K2 with good results. It's close to your desired form factor and was quiet on 20 meters (I haven't tried it on other bands). I also used it on 220V/50Hz in EU. Bob, N7XY On Jul 4, 2011, at 2:23 PM, Wayne Burdick wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 _ N7XY DX Cluster Node - telnet to n7xy.net, port 7300 __ 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 __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
Thanks, Randy. This is even smaller than the MFJ-4103. The web site indicates a noise problem without proper grounding. Have you found this to be an issue? They mention supplying a 2-pin standard power connector, which is *not* what you want if you're trying to get a good common ground back to the AC jack. Is that a typo -- i.e., do they actually supply a 3-pin AC plug? Thanks, Wayne N6KR On Jul 4, 2011, at 3:00 PM, Randy Moore wrote: Wayne, I've had good luck with this: http://www.mtechnologies.com/cup/ 73, Randy, KS4L On Jul 4, 2011, at 4:23 PM, Wayne Burdick n...@elecraft.com wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
Wayne, Take a look at these: http://www.automationdirect.com/static/specs/rhinopss.pdf I realize they're a little bigger than you're looking for but not by much. The 12Vdc/100 watt unit sells for less than $30. Output is adjustable 11-14Vdc. Gary N6LRV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne Burdick Sent: Monday, July 04, 2011 2:23 PM To: Elecraft Reflector Subject: [Elecraft] Looking for miniature 14-V power supply for travel use I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
Or consider sticking with batteries using the inexpensive and tiny PST-3P10 charger on the same page at Mtechnologies. I haven't used it but the specs look good. Rick On Jul 4, 2011, at 3:09 PM, Wayne Burdick n...@elecraft.com wrote: Thanks, Randy. This is even smaller than the MFJ-4103. The web site indicates a noise problem without proper grounding. Have you found this to be an issue? They mention supplying a 2-pin standard power connector, which is *not* what you want if you're trying to get a good common ground back to the AC jack. Is that a typo -- i.e., do they actually supply a 3-pin AC plug? Thanks, Wayne N6KR On Jul 4, 2011, at 3:00 PM, Randy Moore wrote: Wayne, I've had good luck with this: http://www.mtechnologies.com/cup/ 73, Randy, KS4L On Jul 4, 2011, at 4:23 PM, Wayne Burdick n...@elecraft.com wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 __ 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 __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
Wayne, When you do find what you're looking for in a power supply please let us know what it is and how it works out. I'm sure I'm not the only one who'd be interested in the results of your research. BTW other than most of them are marked as 12V (with typical output actually in the 12-12.6V range) little switchers of this type made for consumer electronics are very plentiful at thrift shops and yard sales (sometimes for less than a buck.) However, needless to say YMMV on the RFI issue though TNX/73, Al On Mon July 4 2011 4:23:14 pm Wayne Burdick wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 __ 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
Re: [Elecraft] Looking for miniature 14-V power supply for travel use
Maybe Gamma Research's HPS-1a at http://www.gammaresearch.net/hps-1a.html will meet your needs. It's 3.37 x 1.55 x 5.25, specified to provide 5A continuous and 22A at a 25% duty cycle. It weighs 1.25 pounds (which probably doesn't include the line cord) I have one for my K3, and it works acceptably on CW, but I wouldn't use it for a RTTY contest. I recall that it has about a 5 Farad output capacitance and the caps are operated very close to their rated limit. My recollection may be fuzzy. Their web site shows temporarily out of stock and to expect a delay after placing an order. Perhaps one of your employees might loan his if you can't get one in time. 73 de Dick, K6KR On Jul 4, 2011, at 2:23 PM, Wayne Burdick wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll have internal batteries for field operation, but for indoor use, I'm hoping to find a miniature power supply that meets these criteria: - very small (say 4 x 3 x 1 inches) - light weight (less than 1 lb) - 2 A min. peak output current - 13 to 14 VDC output voltage - input AC voltage range of 100-130 V - low noise I'm sure it will have to be a switching supply. The question is whether any exist with this form-factor that are also quiet from an RF perspective. Anyone know of such a unit? 73, Wayne N6KR __ 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 __ 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 __ 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
