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Am I missing something? Both TX and RX are rated for 5 vdc supply maximum!
Using 6 lithiums in series may have cooked them both.

$349 Canadian for the 1000 ft unit?
I'll build and sell you the same thing for half of that! How many do you want to order?

Apply the incoming 24 volt pulse to a relay. Wire the contacts of the relay to connect the 24 volts to its coil, keeping it "latched" on, while another set of contacts is keeping your other lamp on. Then pushing a "normally closed" switch in the coil circuit will interupt the relay, causing it to dr...

My, my! Let's expand on the proportions. Say the passenger side battery is 2 feet away from the starter with 2/0 cable. The drivers side battery is connected by 4 ga, in say, the next county. Same current from each battery? I don't think so. Most of the current from the drivers side is lost as IR dr...

Where's that guy with the strap-on ammeter?
The large, close cable (passenger side) will carry most of the current.

Thanks, all! Looks like I have a Yagi to build!
I appreciate the info, and love a challenging project!

http://www.marktechopto.com/index.cfm?a=138
That's the link to the voltage/current plot I tried to picture. Sorry.

Here's a typical LED voltage/current plot.
Note it doesn't draw any current until the applied voltage reaches 1.8 volts.
www.solarworld.com has a great collection of solar cells.

Thanks Al, but "buying cable" is what I'm avoiding. $40/mo for dozens of channels that I wouldn't watch. My local (50 miles) UHF staions are free for the grabbing off the air! Did you know that when David Sarnoff (RCA)swindled Philo out of his television patents, the media giant didn't even want to ...

Anybody have good success with an amplified UHF TV antenna? Lots of brands to choose, but which is a good one?
John

In general, Edwardo-no.
Typical led's require 2 volts, and more than 5 ma. to light.
You'll need a bigger solar cell.

Hook up your 12v and 5v so they fight it out!
12-5=7!<p>Sorry. Couldn't resist!

Kindly dispose of properly! Better yet, donate it to a school. Maybe some young budding technician will discover a way to make it live again!

Metal roof, metal chimney? Sounds like a lightning magnet to me! So, add a lightning rod, and copper cable as directly down to earth as possible. Concrete is a poor conductor! Do not rely on it for a "suitable ground"!
John

I see your point Mike!
Try a look in the American Radio Relay League (ARRL) Handbook for loads of info on transmitters and receivers.