Elecraft Power supply
Locked
 
|
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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by John Fritze
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 S&P; 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.
|
|
|
I second this approach.
Mel --- On Mon, 8/9/10, N6JW <[hidden email]> wrote: From: N6JW <[hidden email]> Subject: Re: [Elecraft] Elecraft Power supply To: [hidden email] 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 S&P; 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:[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 |
|
|
In reply to this post by John Fritze
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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
How much would you be willing to pay? $300, $500?
Willis 'Cookie' Cooke K5EWJ ________________________________ From: eric manning <[hidden email]> To: [hidden email] 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:[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 |
|
|
"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
|
|
|
CONTENTS DELETED
The author has deleted this message.
|
|
|
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-ASEL Mail: [hidden email] 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by John Fritze
Guy's,
My opinion, a nice power supply, looking like K3 line, with internal speakers. 73, Lionel, F6FCD |
«
Return to [K3]
|
1 view|%1 views
| Free forum by Nabble | Edit this page |