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Old February 26th 07, 12:26 PM posted to rec.radio.amateur.moderated
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Posts: 877
Default Human-powered portable power generation

Couple of ideas:

1) If you use batteries, the recharger doesn't have to
supply enough power to operate the rig at maximum
demand - only average demand. If a rig draws 4 W on
receive and 20 W on transmit, and you transmit 10% of
the time, a 6-7 watt source should be more than enough.

2) A small solar panel can provide a trickle charge for
NiMH/nicad batteries. Of course it doesn't work at night.

3) Costco and others sell a small crankpowered LED flashlight. No
springs - winding the crank charges the batteries.

4) Or you could follow G5BD's example:

http://jacksonharbor.home.att.net/g5bd.jpg

73 de Jim, N2EY


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Old February 26th 07, 01:44 PM posted to rec.radio.amateur.moderated
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Posts: 38
Default Human-powered portable power generation

writes:

Couple of ideas:

1) If you use batteries, the recharger doesn't have to
supply enough power to operate the rig at maximum
demand - only average demand. If a rig draws 4 W on
receive and 20 W on transmit, and you transmit 10% of
the time, a 6-7 watt source should be more than enough.

2) A small solar panel can provide a trickle charge for
NiMH/nicad batteries. Of course it doesn't work at night.

3) Costco and others sell a small crankpowered LED flashlight. No
springs - winding the crank charges the batteries.

4) Or you could follow G5BD's example:

http://jacksonharbor.home.att.net/g5bd.jpg

73 de Jim, N2EY


The guys on the Kon-Tiki raft expedition in 1947 used a hand cranked
generator. I guess hearing Thor Heyerdahl read the Kon-Tiki book aloud
on the radio when I was 9 was one of the things which pushed me in the
direction of ham radio. The radio operators on Kon-Tiki had been
making clandestine transmissions out of occupied Norway a few years
earlier.

Some months ago a portable, steam powered WWII agents' generator was
on ebay.

73 de LA4RT Jon, Trondheim, Norway

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Old February 26th 07, 07:37 PM posted to rec.radio.amateur.moderated
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Posts: 19
Default Human-powered portable power generation

Jon Kre Hellan wrote:

[snip]


Some months ago a portable, steam powered WWII agents' generator was
on ebay.


Jon,

I never would have thought of that.

Do you have URL or item number, or any other information? TIA.

73,

Bill W1AC

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