Greetings. I am new to the group and hope that I can glean a wealth of
wisdom
from the collective.

I have a dilemma.

I propose to operate 6 or 7 five watt FM transmitters on different
frequencies.
This is in another country where FM bandwidth is fairly open so it
will be possible
to space operating frequencies far apart. I do not need to transmit
very far (300 meters
maximum) and not for very long periods of time (5 minute events). The
surrounding
area is not heavily populated.

I will be transmitting from one location and I hope to minimize
interference between
antennas and broadcast equipment (I am using a multiple output
interface connected
to a laptop). The transmitters are a very small Chinese build PLL...
not the best
in the West (or East). And the antennas are tuneable 1/4 wave with
ground plane radials.

I would like to 1). be able to connect all transmitters to the same
regulated power supply
(13.5V DC) and 2). use the minimum lengths of cabling due to weight
considerations.

I am not concerned about much loss of efficiency as the distance
needed to throw is
well within the capability of the transmitter strength.

Does anybody have any recommendations for spacing, orientation, power
considerations?
And any idea approximately how many amps a 5watt transmitter might
pull from the power
supply?

Sorry for my naivete or ignorance and thank you anyone who cares to
shed light on this
dilemma.
yours,
robb kunz