Total posts : 45366
Techpuppy said some good things. I would add that when my class put a Ramsey AM on the air in the classroom we didn’t get good range and had a lot of noise. We got about 20 feet or so, but the receiver was a cheap unit that had trouble receiving local stations and the Ramsey unit has no provision for tuning to the antenna. I then tossed the ant out the window with no ground and the signal could be heard in the parking lots.
If you already don’t have a whip antenna, don’t buy one. Just use a piece of vertical wire. Try the power line ground, or run some wires horizontal for a ground. You will not have a lot of range, and will probably have some hum issues. You are starting with an excellent transmitter, but the environment is the big challenge.
Don’t forget to check the transmitter adjustments if you change anything. As far as trying a coil loaded ant goes, try it. Not much to lose, especially if you build it from scraps.
I currently run my AMT3000 into a resonant antenna in my basement and get a range of about 200 feet away from my house on a portable radio. Transmitting from inside a campus building is probably worse than from my basement. Just don’t expect much range, but start with that and improve things one at a time.
I think you are a long way from asking for permission to use the roof. You mentioned in another post that you might experiment at home. Do that first then apply what you learn on campus.