"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
