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Post by chrismarks on Sept 7, 2015 18:48:07 GMT
  Good evening gents. I thought I would share a little solar project I'm working on with the old man. The plan is to upgrade the components for bigger and better parts but still small enough to Cary it with my BOB. Chris |
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Post by saeward on Sept 7, 2015 22:19:02 GMT
Although I do like that bit of ingenious kit, that's a heavy old fucker for a BoB. I've recently just brought a "powerbank" from Tesco. Set me back about £28, it has (or is meant to) have a 8500mAh lithium Ion battery. Buying a couple of them for use with the CB's might be a better solution for short-term BoB's. The large batteries on the Baofengs are 3800, so with cold weather you'd probably expect it to charge a CB twice on one charge. They do make ones with a supposed 22400mAh, but I dunno. I'm a little skeptical. www.amazon.co.uk/mobile-phones/dp/B00F5Q4F0U/ref=sr_1_2?ie=UTF8&qid=1441664290&sr=8-2&keywords=portable+power+bank |
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Post by Admin on Sept 8, 2015 0:15:35 GMT
Saeward,
I remember going over power supply/Solar charging options with you.
As good as those chargers are we Hams tend to go with deep cycle batteries as they are a proven commodity in radio field events.
The weight is not a problem really as we need to maintain a cool box with a 42 Watt draw for an insulin cool box.
The weight is a thing that can be split over at least 2 of our bergens and it actually is not very heavy.
Bri, the other moderator
PS, welcome at last my friend
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Post by chrismarks on Sept 8, 2015 0:22:53 GMT
It's not that heavy really. It's not in the BOB it's all in a case I made. That sits on my hip. However the weight of it is a concern of mine. So I have been looking into some 12v led lights instead of the big and bulky lights that I have for it now.
I have a friend at work that has some deep cycle leisure batteries that I can have. One is 72ah I think. So that should be enough to keep radios charged and run lights maybe a small cooler fridge as well.
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Post by Admin on Sept 8, 2015 0:29:57 GMT
I forgot to mention that most radios that will have the clout to make worthwhile and constant QSOs (copies) generally have a Voltage of 13.8 volts even on 4 Watts for CB and on higher Wattage for the Amateur bands.
The usage of a mobile phone would make a deep cycle leisure battery last for an age, a 14 Ah leisure battery will normally last about 6 to 8 hours at 100 Watts in normal QSO usage.
Those power packs would die faster than I would feel happy about.
It takes 6 hours to Charge a UV-5R on mains electricity, I'll do the calculation soonish to work out the quickest solar charge time/best Wattage draw.
On a bright note, the son has tracked down some leisure batteries needing a good home :-)
Bri
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