PROCASTER AMTX100 AM Transmitter
Installation and Operation
Page 2 of 9
Step 1. Choose a Quiet Channel
Drive around your chosen broadcast area and listen for clear channels. Note: car radios are
usually more sensitive than portables, so that should be considered too. If you want to broadcast
at night, you would have to check if the channel is clear then. It's more difficult to broadcast at
night because changes in the ionosphere cause signals from higher-powered radio stations
to reach your broadcast area; so bear that in mind. Try to choose one of the highest 42 channels
available for the PROCASTER™ by setting the option switches accordingly. The higher the
frequency, the better the range because of the restrictive short antenna length.
Step 2. Install Location
Higher mounted antennas usually result in better range. The PROCASTER™ mounting bracket is
intended for mounting on a flat vertical surface. Optional kit # XXXXX allows pole mounting. Make
sure you can access the transmitter for tuning once it is in its final position. A good height above
earth ground is about 25 feet. The roof of a 2-storey building is a good choice.
Step 3. Assemble Antenna
Three aluminum tubes (large 5/8", medium 1/2" and small 3/8") are assembled together to form a
103 inch antenna. These sections are held together using 2 stainless steel pipe clamps.
•Join the large tube to the medium tube
oslide a pipe clamp over the mid-point of the slotted end of the large tube
oinsert the medium tube into the large tube lining up the black dot
otighten pipe clamp snugly using a 1/4" nut driver
•Join the small tube to the medium tube
oslide a pipe clamp over the mid-point of the slotted end of the medium tube
oinsert the small tube into the medium tube lining up the black dot
otighten pipe clamp snugly using a 1/4" nut driver
•Fasten the assembled mast to the transmitter using (2) #10 lock-washers and (2)
locknuts - refer to E
oUse a screwdriver to prevent the bolt from turning while tightening the nuts - refer
to F
oTighten snugly (don't over-tighten)
•Antenna assembly is now complete
(antenna assembly pics)
Step 4. Mount External Transmitter
In all mounting cases, ensure you can reach the unit for tuning once installed!
Direct wall mounting
Mount the PROCASTER™ directly to a flat vertical surface using the 4 holes in the case
mounting plate. Make sure that there is sufficient space between the antenna mast and the rear
wall such that snow/ice does not cause a short.
(direct on wall)
