Re: [Elecraft] KBT3?
The LiFePo4 packs that are showing up on the market these days are more than adequate for running the K3 and its KPA3 at 100W. Although the connections to the supply might be more easily done in the space occupied by the KPA3, the use case is much better for a K3+KPA3 with a LiFePO4 pack. Perhaps a bracket that is used in place of the KRX3 would be more useful, if perhaps more engineering work. The 0.9A draw of the K3 in RX would deplete a 2.4AH LiFePO4 pack in a couple of hours of just RX, and the TX current draw of the QRP K3 doesn't require the power density of LiFePO4 either. So, a QRP K3 would do better with a more energy dense pack. But the KPA3 does need the high power density provided by LiFePO4 packs. There's also the safety issue: Li+ and LiPoly packs are much less safe than LiFePO4, and I suspect that if they're widely used in ham gear, some day there will be a catastrophic rig accident. The LiFePO4 chemistry is much safer, especially with regard to over- and under-charging and physical damage. Leigh/WA5ZNU Wayne N6KR wrote: ...OTOH, we could offer an internal Li-ion battery for the K3 that would be interchangeable with the KPA3 module. We could get about 7 AH in there, I bet. Built-in fast charger, charge monitoring at the front panel, separate fuse h nice for QRP picnic-table outings. A fuel cell would be even more fun. 73, Wayne N6KR --- ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KBT3?
I would suggest that maybe a Transverter that matches the color and lines of the K3 with 144, 222 and 432 Mhz mix and match modules would just be a nice touch. Thanks for the great radio guys! Dan WILLIS COOKE wrote: > > Whatever you offer Wayne, be sure that it weighs at least 50 pounds. > > - Dan AB3EN -- View this message in context: http://n2.nabble.com/K4%3A-serious-challenge-for-the-%2410K-toys-tp2104351p2106897.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KBT3?
WILLIS COOKE wrote: Wayne, for those who complain that the K3 is not heavy enough I suggest that you sell a battery box to attach to the bottom with a 100 amp hour gel cell. That should make it heavy enough to give anyone a hernia. This is left as an exercise for the reader :) OTOH, we could offer an internal Li-ion battery for the K3 that would be interchangeable with the KPA3 module. We could get about 7 AH in there, I bet. Built-in fast charger, charge monitoring at the front panel, separate fuse h nice for QRP picnic-table outings. A fuel cell would be even more fun. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
