[tortoise]

If you find a radio-bright planet, it's a civilization.

I don't think anyone is looking for radio-bright planets.

In any case, this falls under the same reasoning. A civilization that is maximizing its use of the EM spectrum isn't going to look "radio-bright". Efficient use means lower power and much wider spectrums for a single channel. It also means much higher frequencies. Most new technology long-range RF links use less than one watt of power, and even satellite is hopping on board. The days of the old C-band transmitters and high power microwave links is fading. Which is wonderful, as most of that technology really sucks from an efficiency standpoint. It is probably safe to assume that any other advanced civilization will follow a similar trajectory towards increased bandwidth and efficiency in their communication infrastructure as well.

[tortoise]

Which doesn't mean there won't be SOME identifiable eminations from other civilizations, just that there won't likely be the wealth of obvious ones in relatively low-frequency spectrum being sent broad-beam like we generate today.

[Calvin Locke]

I don't think anyone is looking for radio-bright planets

Shostack is on Art Bell "fairly" frequently. He made the point that nevermind the '36 Olympic broadcast and such, military radars send out high-powered directional beams.

Saw something on TLC about orbital clutter. The Brits have a site that puts out 2-2.5Megawatts (NORAD equivalent) tracking stuff.

Black-hole hunters look for energy anomalies.

OTOH, the last intelligent life produced radio wave passed by the Earth the day before Marconi did his Alexander Graham Bell imitation. The planet that sent that last signal was involved in a catastrophic collision that destroyed all intelligent life.

Now excuse me while I finish my aplication for a grant to pursue technical, off-planet, remote viewing...