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G0DZB
11th Apr 2016, 19:59
I've been building a LiFePO4 pack using 4 of these 15Ah cells from http://eclipsebikes.com/headway-lifepo4-40152s-15ah-p-1053.html
The "raw cells" had their first outing a few days ago
739
But now they are in a nice box complete with LCD Voltage/Current/Power and Energy display
740

WD5IKX
12th Apr 2016, 03:36
Very interesting Peter. How much does this battery pack weigh?

John WD5IKX
Texas, USA

G0DZB
12th Apr 2016, 07:05
I haven't weighed it, but the specs on the page I linked to give 480g for each cell.

G1YBB
13th Apr 2016, 08:19
that's a very cool and neat build. Did you 3D print the orange end pieces?
I take it that's a linear it's powering? Does that come with powerpole DC connectors or did you modify it?

G0DZB
13th Apr 2016, 08:33
that's a very cool and neat build. Did you 3D print the orange end pieces?
No, I bought them with the batteries. The mounting is not ideal and I'm half expecting the epoxy that holds the cells in place to eventually give way. If it does, then I'll investigate some 3D printed parts if I can find someone to make them for me.

I take it that's a linear it's powering? Does that come with powerpole DC connectors or did you modify it?
It is an Elecraft KXPA-100 and it has two powerpole "sockets" on the back. One to connect to power supply, and one to provide power to a KX3.
Due to the way powerpoles stack together I had to use a "non-standard" layout on the battery box to be able to mount sockets for KXPA,KX3 and PX3.
I hope to get out /P later today and give the battery another cycle :-)

G1YBB
13th Apr 2016, 08:39
No, I bought them with the batteries. The mounting is not ideal and I'm half expecting the epoxy that holds the cells in place to eventually give way. If it does, then I'll investigate some 3D printed parts if I can find someone to make them for me.

It is an Elecraft KXPA-100 and it has two powerpole "sockets" on the back. One to connect to power supply, and one to provide power to a KX3.
Due to the way powerpoles stack together I had to use a "non-standard" layout on the battery box to be able to mount sockets for KXPA,KX3 and PX3.
I hope to get out /P later today and give the battery another cycle :-)

That's a cool looking linear!
Good luck today, my conditions widget isn't looking too promising!

G0DZB
13th Apr 2016, 08:46
I'm not intending to put up anything "big" today, just to operate from the car with these http://www.peteronion.org.uk/G0DZB/MagMount.html.

G1YBB
13th Apr 2016, 08:57
I'm not intending to put up anything "big" today, just to operate from the car with these http://www.peteronion.org.uk/G0DZB/MagMount.html.

That's interesting work. Before I 'stepped up' to becoming a radio amateur I did similar experiment builds with ¼w verticals for 27FM. In the end I went for a straight unloaded vertical using a fishing rod araldited into a 3/8 mount (I seem to remember someone making me one to my request and chrome plating it but I may be remembering incorrectly) and then taking the outer jacket off a length of RG213, scrunching up the braid, removing the centre then smoothing/stretching it out over the fishing rod and finally an outer jacket of heatshrink. Worked pretty good! I also used it moving mobile, atop my mini 1000 :)