Greetings All, I had to drop a camera down a 6 inch diameter steel well casing to see what was going on. I used one of the tiny ubiquitous color cameras with a built in transmitter. I don't know the what the transmitting frequency is but the antenna wire is about 2 inches long. The camera was lowered down the well casing without touching the sides ar anything else. While watching the image on a little monitor the image would degrade in certain spots. The degradation was repeatable and only happened in certain spots. Is this because the signal bounces inside the casing and interferes with itself? Thanks, Eric
What's happening with this xmitter in a pipe?
Jul 26, 2007
3 Replies
Possibly it came close to a nearby power main cable, possibly a cable TV drop (though not likely), or perhaps some large piece of metal was just getting between the xmitter and rcvr.
Maybe be pipe is acting as a waveguide, setting up standing waves... at certain spots, you get negative reinforcement. Several equidistant blank spots would lend support to this hypothesis.
I agree. :-)
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required