Re: [Elecraft] Elecraft Power supply
On Aug 10, 2010, at 5:09 PM, Ron D'Eau Claire wrote: Don't forget the caveat I offered with that space size - I've yet to see a square millimeter in a cabinet that Wayne didn't disclose a planned use for by the time the product reached maturity :-) Take a peek at the inside of a fully-loaded KX1, K2 or K3 for an example. There's a little bit of space in the K2 left, plus one unused connector (J5) on the RF board. Surely it was intended for something Bill Coleman, AA4LR, PP-ASELMail: aa...@arrl.net Web: http://boringhamradiopart.blogspot.com Quote: Not within a thousand years will man ever fly! -- Wilbur Wright, 1901 __ 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] Elecraft Power supply
Joe Subich, W4TV-4 wrote: The one instance that would justify an Elecraft power supply is if they would produce a 48/60 Volt 200 W replacement for the KPA-3. I'd go for a higher power output and matching supply in a New York minute. The higher voltage amplifier would significantly reduce transmit IMD while the 200 - 250 W output would both obviate the need for an amplifier and make it easier to drive low gain glass bottle and ex-USSR ceramic triode amplifiers to the legal output. Could 200W be done within the K3 form factor (and without the assistance of deafening fans?) Even if the output were still 100W I'd still find it an attractive option, just for the better linearity. - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://elecraft.365791.n2.nabble.com/Elecraft-Power-supply-tp5393753p5411398.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] Elecraft Power supply
If Elecraft could come up with a replacement for the KPA3 delivering 100-200W with 40dB IMD performance, I would buy one in an instant. Forget about the power supply, that's a commodity. AB2TC - Knut Julian, G4ILO wrote: snip Could 200W be done within the K3 form factor (and without the assistance of deafening fans?) Even if the output were still 100W I'd still find it an attractive option, just for the better linearity. -- View this message in context: http://elecraft.365791.n2.nabble.com/Elecraft-Power-supply-tp5393753p5412184.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] Elecraft Power supply
That's right, Ron. But I like 13.8 VDC rigs, mainly for portabilty reasons... My FT-1000MP (though a wonderful rig) was a chore to switch over 230 VAC/13.8 VDC. But many modern rigs also have (built-in) PSUs for specific voltages: FT-1000 MkV and even the new FT-5000. But for 200 W? Just 3 dB more - hardly noticeable. I run my K3 on a little PSU and on a 12V lead-gel battery when operating portable. Nice! 73 Richard Ron D'Eau Claire [via Elecraft] schrieb: The rigs most of us remember with matching power supplies - the Collins, Heathkits, etc.- HAD to have custom power supplies designed to provide specific voltages and the specific currents needed. That went away with the advent of the rigs designed to run from 13.8 VDC. Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] /user/SendEmail.jtp?type=nodenode=5410297i=0 This list hosted by: http://www.qsl.net http://www.qsl.net?by-user=t Please help support this email list: http://www.qsl.net/donate.html View message @ http://elecraft.365791.n2.nabble.com/Elecraft-Power-supply-tp5393753p5410297.html To unsubscribe from Re: Elecraft Power supply, click here http://elecraft.365791.n2.nabble.com/template/NodeServlet.jtp?tpl=unsubscribe_by_codenode=5393961code=aGI5YW5tQGJsdWV3aW4uY2h8NTM5Mzk2MXwtNTg1MDc0NDIw. - Richard - HB9ANM -- View this message in context: http://elecraft.365791.n2.nabble.com/Elecraft-Power-supply-tp5393753p5413284.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] Elecraft Power supply
JOHN SAID Elecraft could design a small (RFI quiet) switching PS which would constantly recharge an appropriately sized LiFePO4 battery pack, which in turn would supply the power needed by the K3/P3 combo (i.e. 25 amps). In effect this would replace the large caps in the HPS-1a design, with the LiPo battery. Bottom line: a universal voltage uninterruptible internal PS. I agree, and more to the point -- I would buy one. eric VA7DZ -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. __ 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] Elecraft Power supply
How much would you be willing to pay? $300, $500? Willis 'Cookie' Cooke K5EWJ From: eric manning eric.mann...@engr.uvic.ca To: elecraft@mailman.qth.net Sent: Tue, August 10, 2010 10:29:39 AM Subject: Re: [Elecraft] Elecraft Power supply JOHN SAID Elecraft could design a small (RFI quiet) switching PS which would constantly recharge an appropriately sized LiFePO4 battery pack, which in turn would supply the power needed by the K3/P3 combo (i.e. 25 amps). In effect this would replace the large caps in the HPS-1a design, with the LiPo battery. Bottom line: a universal voltage uninterruptible internal PS. I agree, and more to the point -- I would buy one. eric VA7DZ -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. __ 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] Elecraft Power supply
I think I would pay $500. I have no idea if it is do-able at that price. eric VA7DZ How much would you be willing to pay? $300, $500? Willis 'Cookie' Cooke K5EWJ From: eric manning eric.mann...@engr.uvic.ca To: elecraft@mailman.qth.net Sent: Tue, August 10, 2010 10:29:39 AM Subject: Re: [Elecraft] Elecraft Power supply JOHN SAID Elecraft could design a small (RFI quiet) switching PS which would constantly recharge an appropriately sized LiFePO4 battery pack, which in turn would supply the power needed by the K3/P3 combo (i.e. 25 amps). In effect this would replace the large caps in the HPS-1a design, with the LiPo battery. Bottom line: a universal voltage uninterruptible internal PS. I agree, and more to the point -- I would buy one. eric VA7DZ -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. __ 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] Elecraft Power supply
Now, why should Elecraft build power supplies? Let them stick to what we know their good at: making transceivers and ancillaries, kits, ... There is a plethora of good, clean PSUs on the market. Just for info: I have two, rated at 28 A peak, from a German provider but they look as if they were from Jetstream! No problem, no noise, working flawlessly for two years. Purchased at Friedrichshafen Ham Fair for about $ 90 each - so what are we talking about? Our friends at Aptos are busy working on the P3, KPA500, ATU... Why should they go into the trouble of developing yet another PSU when there are so many to choose from? - just for the fun of having a matching box next to the K3/P3? Elecraft is unique - the K3 is unique - anyone can build decent PSUs. Just my two Eurocents! Eric Manning wrote: I think I would pay $500. I have no idea if it is do-able at that price. eric VA7DZ How much would you be willing to pay? $300, $500? Willis 'Cookie' Cooke K5EWJ - Richard - HB9ANM -- View this message in context: http://elecraft.365791.n2.nabble.com/Elecraft-Power-supply-tp5393753p5393961.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] Elecraft Power supply
How much would you be willing to pay for an internal uninterruptible PS in the P3? Let's see: Working from what we already know . . . Gamma Research HPS-1a is $169 According to Ron AC7AC there is only 4x4x6 space available in the P3, so keeping that as a limiting factor, even the following LiFePO4 battery pack would fit in: Powerizer's 12.8v (working; 14.6v peak; 10v cutoff) 9.9aH (127WH at 21amp) LiFePO4 battery pack (4S3P) 2lbs, 4.3x3.3x3.4 [since LiFePO4 batteries allow full power operation through more than 95% of its capacity, this pack would allow for significant operational time at 100w. Also note this technologies reputation for safety (no fire or explosion risk), 10+ year lifespan with thousands of full discharge/charge cycles, and quick recharge times.]Current Price = $154 [$139 in quantity] Of course, one might not need anything nearly as large as this battery pack for the intended function! Powerizer also lists a 6.6aH pack for $75. So one could reasonably surmise that it should be possible to sell an internal P3 PS along the lines suggested for somewhere between $175 to $350. At anything like these prices, I would buy it without hesitation. 73 John N6JW WILLIS COOKE-2 wrote: How much would you be willing to pay? $300, $500? Willis 'Cookie' Cooke K5EWJ JOHN SAID Elecraft could design a small (RFI quiet) switching PS which would constantly recharge an appropriately sized LiFePO4 battery pack, which in turn would supply the power needed by the K3/P3 combo (i.e. 25 amps). In effect this would replace the large caps in the HPS-1a design, with the LiPo battery. Bottom line: a universal voltage uninterruptible internal PS. I agree, and more to the point -- I would buy one. eric VA7DZ -- View this message in context: http://elecraft.365791.n2.nabble.com/Elecraft-Power-supply-tp5388972p5404591.html Sent from the [K3] 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] Elecraft Power supply
Don't forget the caveat I offered with that space size - I've yet to see a square millimeter in a cabinet that Wayne didn't disclose a planned use for by the time the product reached maturity :-) Take a peek at the inside of a fully-loaded KX1, K2 or K3 for an example. Tnx for the Powerizer lead. That might be just what I need (assuming Elecraft doesn't come up with a magic E solution). Ron AC7AC -Original Message- How much would you be willing to pay for an internal uninterruptible PS in the P3? Let's see: Working from what we already know . . . Gamma Research HPS-1a is $169 According to Ron AC7AC there is only 4x4x6 space available in the P3, so keeping that as a limiting factor, even the following LiFePO4 battery pack would fit in: Powerizer's 12.8v (working; 14.6v peak; 10v cutoff) 9.9aH (127WH at 21amp) LiFePO4 battery pack (4S3P) 2lbs, 4.3x3.3x3.4 [since LiFePO4 batteries allow full power operation through more than 95% of its capacity, this pack would allow for significant operational time at 100w. Also note this technologies reputation for safety (no fire or explosion risk), 10+ year lifespan with thousands of full discharge/charge cycles, and quick recharge times.]Current Price = $154 [$139 in quantity] Of course, one might not need anything nearly as large as this battery pack for the intended function! Powerizer also lists a 6.6aH pack for $75. So one could reasonably surmise that it should be possible to sell an internal P3 PS along the lines suggested for somewhere between $175 to $350. At anything like these prices, I would buy it without hesitation. 73 John N6JW __ 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] Elecraft Power supply
The rigs most of us remember with matching power supplies - the Collins, Heathkits, etc.- HAD to have custom power supplies designed to provide specific voltages and the specific currents needed. That went away with the advent of the rigs designed to run from 13.8 VDC. Ron AC7AC __ 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] Elecraft Power supply
Ron, True, but they certainly did look nice. However, Al-i-ken-su still builds matching 12v supplies for their 12v radios. Some people like to have a complete matching station. If the matching supply should do something more than the typical Aston, then bonus. There have been some very good power supply ideas put forth by the the greater list. Maybe Elecraft will develop and sell one. 73, K1NR On Tue, 10 Aug 2010 15:41:52 -0700 Ron D'Eau Claire r...@cobi.biz wrote: The rigs most of us remember with matching power supplies - the Collins, Heathkits, etc.- HAD to have custom power supplies designed to provide specific voltages and the specific currents needed. That went away with the advent of the rigs designed to run from 13.8 VDC. Ron AC7AC __ 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] Elecraft Power supply
Hi Richard: If you look at my earlier emails, you will see that we are not talking about Elecraft simply re-inventing the wheel, but rather doing something innovative and state of the art in an uninterruptible PS internal to the P3 to enhance the portability of the K3/P3 combo. No extra box (i.e. PS) to carry. This is a big deal for the significant number of us who travel extensively with our K3's. John N6JW Richard Squire - HB9ANM wrote: Now, why should Elecraft build power supplies? Let them stick to what we know their good at: making transceivers and ancillaries, kits, ... There is a plethora of good, clean PSUs on the market. Just for info: I have two, rated at 28 A peak, from a German provider but they look as if they were from Jetstream! No problem, no noise, working flawlessly for two years. Purchased at Friedrichshafen Ham Fair for about $ 90 each - so what are we talking about? Our friends at Aptos are busy working on the P3, KPA500, ATU... Why should they go into the trouble of developing yet another PSU when there are so many to choose from? - just for the fun of having a matching box next to the K3/P3? Elecraft is unique - the K3 is unique - anyone can build decent PSUs. Just my two Eurocents! Eric Manning wrote: I think I would pay $500. I have no idea if it is do-able at that price. eric VA7DZ How much would you be willing to pay? $300, $500? Willis 'Cookie' Cooke K5EWJ -- View this message in context: http://elecraft.365791.n2.nabble.com/Elecraft-Power-supply-tp5393753p5410621.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] Elecraft Power supply
The one instance that would justify an Elecraft power supply is if they would produce a 48/60 Volt 200 W replacement for the KPA-3. I'd go for a higher power output and matching supply in a New York minute. The higher voltage amplifier would significantly reduce transmit IMD while the 200 - 250 W output would both obviate the need for an amplifier and make it easier to drive low gain glass bottle and ex-USSR ceramic triode amplifiers to the legal output. 73, ... Joe, W4TV On 8/10/2010 6:41 PM, Ron D'Eau Claire wrote: The rigs most of us remember with matching power supplies - the Collins, Heathkits, etc.- HAD to have custom power supplies designed to provide specific voltages and the specific currents needed. That went away with the advent of the rigs designed to run from 13.8 VDC. Ron AC7AC __ 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] Elecraft Power supply
Hi Joe That would be a fantastic option. I would also like to see the LPA3 use 50 volt or higher FETS as well. This would eliminating all sources of poor TX IMD. This option would certainly make me sell my FT1000D which I keep for the very reasons that you state. I have switched between 200 watts and 1kw on numerous QSO's without telling the other operators, most stations never know that I have even done it nor do they pass any comment on signal strength loss. 73 John The one instance that would justify an Elecraft power supply is if they would produce a 48/60 Volt 200 W replacement for the KPA-3. I'd go for a higher power output and matching supply in a New York minute. The higher voltage amplifier would significantly reduce transmit IMD while __ 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] Elecraft Power supply
I would be interested in both units! I was wondering why Elecraft never produced a super clean DC power supply. Currently I'm using a 35Amp Astron at home and a Samlex for away from home. John K2QY __ 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] Elecraft Power supply
John Fritze wrote: I would be interested in both units! I was wondering why Elecraft never produced a super clean DC power supply. One reason that has been put forward for this in the past is that power supplies are safety critical items, which means there is a large regulatory overload in designing one, e.g. getting UL and similar listings. -- David Woolley Emails are not formal business letters, whatever businesses may want. RFC1855 says there should be an address here, but, in a world of spam, that is no longer good advice, as archive address hiding may not work. __ 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] Elecraft Power supply
Obtaining gummit approval and certification ... both US and foreign ... for equipment that plugs in is a formidable task! Been there, done that, as the saying goes. 73! Ken Kopp - K0PP __ 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] Elecraft Power supply
I find it hard to see much value in Elecraft simply reproducing a standard PS (like the Astron or Samlex you mention) dressed up in Elecraft colors. However, I think an innovative internal power supply designed for the K3 and housed inside the P3 would be a very useful and marketable product. Here is what I would love to see: Given the success of the Gamma Research HPS-1a, and Lithium-ion Nano phosphate batteries (e.g. A123), Elecraft could design a small (RFI quiet) switching PS which would constantly recharge an appropriately sized LiFePO4 battery pack, which in turn would supply the power needed by the K3/P3 combo (i.e. 25 amps). In effect this would replace the large caps in the HPS-1a design, with the LiPo battery. Bottom line: a universal voltage uninterruptible internal PS. The innovation would come in the form of the control hardware that would take care of input voltage, proper charging rates, over/under voltage protection, cell balancing, etc. This should be able to be done in the open space available in the P3 without compromising the expansion potential provided for in the stackable PC boards at the rear of the P3. Here are the marketable advantages to this approach: 1. It is in keeping with the portable design philosophy of the K3. I would LOVE to take a P3 (with internal PS) in place of the external PS (Astron switcher) I now have to lug around. One less box to take is a BIG asset. (I could easily fit a K3 and P3 in a small aluminum case that I can take as carry on luggage on a plane. Since I have to take a PS, the utility of the panadaptor/waterfall functions of the P3 represents significant operational enhancement, simply going along for the ride!) 2. Battery technology is now at a point where one could get around one hour of operating time running a contest at 100w; more doing SP; and significant battery life running reduced power, let alone QRP levels. 3. A real boon for dxpeditions. One could still keep operating for a while after loss of commercial power (an all too frequent occurrence in many parts of the world), or during refueling of generators. 4. The P3 would not move around when pushing buttons! :) I believe something like this would fill a real need, fit with the Elecraft ethos, further the state of the art, and increase demand for the P3. While this option would cost more than currently available power supplies, I believe the utility and benefits far outweigh the cost. Of course, some may have no need for this option and do without, others like me would be willing to place our orders immediately. 73 John N6JW K1, K2, K3 owner. John Fritze wrote: I would be interested in both units! I was wondering why Elecraft never produced a super clean DC power supply. Currently I'm using a 35Amp Astron at home and a Samlex for away from home. John K2QY -- View this message in context: http://elecraft.365791.n2.nabble.com/Elecraft-Power-supply-tp5388972p5390986.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] Elecraft Power supply
I second this approach. Mel --- On Mon, 8/9/10, N6JW j...@dslextreme.com wrote: From: N6JW j...@dslextreme.com Subject: Re: [Elecraft] Elecraft Power supply To: elecraft@mailman.qth.net Date: Monday, August 9, 2010, 3:50 PM I find it hard to see much value in Elecraft simply reproducing a standard PS (like the Astron or Samlex you mention) dressed up in Elecraft colors. However, I think an innovative internal power supply designed for the K3 and housed inside the P3 would be a very useful and marketable product. Here is what I would love to see: Given the success of the Gamma Research HPS-1a, and Lithium-ion Nano phosphate batteries (e.g. A123), Elecraft could design a small (RFI quiet) switching PS which would constantly recharge an appropriately sized LiFePO4 battery pack, which in turn would supply the power needed by the K3/P3 combo (i.e. 25 amps). In effect this would replace the large caps in the HPS-1a design, with the LiPo battery. Bottom line: a universal voltage uninterruptible internal PS. The innovation would come in the form of the control hardware that would take care of input voltage, proper charging rates, over/under voltage protection, cell balancing, etc. This should be able to be done in the open space available in the P3 without compromising the expansion potential provided for in the stackable PC boards at the rear of the P3. Here are the marketable advantages to this approach: 1. It is in keeping with the portable design philosophy of the K3. I would LOVE to take a P3 (with internal PS) in place of the external PS (Astron switcher) I now have to lug around. One less box to take is a BIG asset. (I could easily fit a K3 and P3 in a small aluminum case that I can take as carry on luggage on a plane. Since I have to take a PS, the utility of the panadaptor/waterfall functions of the P3 represents significant operational enhancement, simply going along for the ride!) 2. Battery technology is now at a point where one could get around one hour of operating time running a contest at 100w; more doing SP; and significant battery life running reduced power, let alone QRP levels. 3. A real boon for dxpeditions. One could still keep operating for a while after loss of commercial power (an all too frequent occurrence in many parts of the world), or during refueling of generators. 4. The P3 would not move around when pushing buttons! :) I believe something like this would fill a real need, fit with the Elecraft ethos, further the state of the art, and increase demand for the P3. While this option would cost more than currently available power supplies, I believe the utility and benefits far outweigh the cost. Of course, some may have no need for this option and do without, others like me would be willing to place our orders immediately. 73 John N6JW K1, K2, K3 owner. John Fritze wrote: I would be interested in both units! I was wondering why Elecraft never produced a super clean DC power supply. Currently I'm using a 35Amp Astron at home and a Samlex for away from home. John K2QY -- View this message in context: http://elecraft.365791.n2.nabble.com/Elecraft-Power-supply-tp5388972p5390986.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 __ 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
