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PR100 y 11
PREAMP INSTALLATION
This part of the manual assumes that you have a receiver or transceiver (if
using a transceiver a TR Switch is needed, like our RFS-1). This preamp
operates off a 12 volt DC supply which is connected to a 2.2 µH inductor
then to the center of the antenna cable near your radio(see diagram on next
page). Care has to be taken so that you don’t short out any connections.
Also a .01µF ceramic capacitor must be installed after the radios’ output and
before the connection to the 12 volt supply. This capacitor serves as a DC
block while allowing RF to pass through.
Installation of the preamp is fairly simple, yet there are a few considerations
you will wish to look into before you continue.
Any RF preamp should be located as close as possible to the antenna itself
for best performance. This is due to the losses involved in the cabling to the
antenna. Since a signal can be very weak at the antenna, it can be almost
nonexistent after it has gone through a length of cable. A non existent signal
doesn’t get amplified very well. If you boost the weak signal near the
antenna, it can be boosted to a high enough level that it can easily be sent
down the length of the cable.