Total posts : 45366
Don’t waste time with a C.Crane. They have a stubby antenna that is not suitable for penetrating walls or reaching more than 10-feet.
Get a Wholehouse 2.0, which has instructions for adding a 1/4 wave antenna tuned to the exact frequency.
Also, there is a hidden switch under a round sticker in the battery compartment that boosts the power in case the low setting is not enough.
The receiver is another matter, and since you need a low cost receiver located outdoors I have no solution.
So, let’s build on RFB’s good ideas…
In his version of placing power and audio on the same wire, that would only work with D.C., as obviously AC would be loud hum.
If your audio lines were balanced, you could send the power in the phantom configuration used by many condenser microphones, which also works well.
The headphone idea has been successfully done by Tha Dood, part 15 in Poca, West Virginia, using an inexpensive Radio Shack model at 49mHz.
He has had only one problem, a lot of 49mHz baby monitors are in use in his area, so you’d need to monitor 49mHz to pick the most quiet channel.