A hint: Make the loading coil part of the transmitter rather than part
of the antenna.
If every thing is built inside of a single metal box it should be OK.
Put this thing on top of a metal surfaced roof and ground your box to
the surface directly.
The 3 meter pipe should be very close to the box. Like 1 or 2 inches
and you have to subtract any lead length from the antenna size.



Randall J wrote:
I operate a Part 15 station for my neighborhood (FM) and have acquired
an AM transmitter. I've seen plans for vertical antennas but would
rather make my own from the few parts I have. I have 8ft of aluminum
tubing and would like to make a loading coil using 3 inch diameter PVC
pipe. Given the frequency I operate on (1610khz), 8 ft of tubing, and a
3.5 inch coil form, how many turns of 22AWG insulated wire would I need
to wrap? (Oh the tubing is in two pieces and I can slide the top piece
up and down).

Is there a program I can download to find this out?

Randall