Marshall Amplification Field 4000, Owner'S Manual

Page: 13 / 40

Page 13
Ow ner’s Manual
Vertical vs. Horizontal
Now, point the receiver at the transmitter again and rotate the
antenna until the elements are vertical. Did the strength of the
signal change? Or was it strongest somewhere in-between? In
most cases, one orientation will be stronger than any other.
This is important: Make it a habit to rotate the receiver from
horizontal to vertical every time you use it at a new location.
Practice:
1. Have someone hide the transmitter in a difficult spot and see if
y ou can f ind it. Y ou can make a game out of this. (Thousands of
ham radio enthusiasts actually conduct competitive transmitter
hunts in major cities in the US and around the world.) Or, put the
transmitter on a person, give them a head start, and see if y ou
can track them down.
2. Hang the transmitter with the antenna vertical on a wooden
object or a string and drive away with your receiv er (don’t set it
on the ground, though; transmitters always perform poorly on the
ground.) See how far you can go bef ore losing the signal. Try
tuning in the signal when it is very weak. Experiment with all the
controls and see what effect on the signal they have at a dis-
tance.