Originally Posted by Carol H
Wonder if it may be possible to order a Scamp with LED's these days as they are now offering them in their parts store.
I have a 19" flat screen in my trailer and LED lights right beside it and I have never had a signal drop on it even when using the over the air Leaf Antenna.
Like I said earlier all LED lights are not equal. The configuration comes in several variations.
1. No regulation at all. Lights will dim when the furnace
2. Analog regulator. Lights even output until the voltage drops too low. Disadvantage you burn up some power in heat from the analog regulator.
3. Switching regulator. These are the most efficient. Drawbacks include rfi (radio frequency interference) if there's no built in protection.
3a. There's two type of rfi one comes in on the power line. Can be controlled with ferrite beads in the power lines, usually inside the module.
3b. Rfi that is transmitted through the air. The is controlled with shielding.
The problem is unless you know what you're looking for it's really hard to tell what you're got. As was pointed out earlier an AM radio tuned off of any radio station will tell you if you're getting air born rfi. You might be able to tell if you're getting power line rfi by putting the antenna close to the power distribution center. But no guarantees there.
Carol, as you said you don't have a problem, neither do I. I have ham radio gear that is pretty sensitive to rfi and no problem.
Rfi can be a real tricky thing to deal with. Manufacturers that care spend lots of money and time to make sure their device doesn't produce rfi and their device it pretty immune to rfi. Those that don't care will put stuff on the market that really nasty.
How to protect yourself. Make sure electrical
devices are FCC Part 15 certified. That includes plug in power supplies. That would include most everything that plugs into 12 volt or 120 volt power. Most stuff has a processor in it or switching supply or both.