SEC Re: [LeArc] Generator Question

[R. Patrick Ryan]

hi LEARC,

Have had some past experience with a ham's home brew models using a
gasoline engine that he salvaged from a mower, installed on a metal
frame, fan belt linked to a new car alternator  (90A+) and the alternator
output attached to a deep cycle marine battery. The engine would
definitely change pitch and speed with increased load on the battery.
Wheels were on one end of a hand cart, and to keep it from walking away,
it had two pointed legs on the other end of the cart that dug in when set
down.

Made a great source for 13.8VDC emergency power for his mobile rigs that
he would set up for our emergency stations. 

The DC to AC inverter is a good touch on this for a commercial power rig,
but wonder if it is RF quiet, i.e. no radio interference. Same for the
gas engine. 

vy 73 de Pat Ryan KC6VVT
Illinois Section Emergency Coordinator, ARRL
P. O. Box 24
Tonica, IL 61370-0024   
kc6vvt@arrl.net

On Sun, 16 Mar 2003 09:38:16 -0600 "Joe Rossmiller" <ag9y@macomb.com>
writes:
> From the web page you mentioned.
> 
> "An Economy Control function has been adopted which chooses the 
> minimum
> engine rpm necessary for the actual electrical load."
> 
> So the power is being provided by the engine.  The batteries act as 
> a big
> filter keeping the load constant.  The engine keeps replacing the 
> energy
> drawn by the load.
> 
> You may have hit on something.  The unit might be using several 
> batteries in
> series producing a higher battery voltage, thus reducing the current 
> needed.
> 
> Going back to the web page, I also found this.
> 
> All the controls on one surface, including the AC and DC outlets."
> 
> A DC outlet is provided.  And the only voltage that would make sense 
> for a
> DC supply would be 12 volts.  As far as how much current the unit 
> can
> provide, It does not say, but I would feel certain it could power an 
> HF rig
> or two with no trouble.
> 
> Again, I have no idea what I'm talking about.  But that has never 
> stopped me
> before.
> 
> Joe - AG9Y

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