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   Well all of this talk about wireless data links has gotten my mind in
motion. Here is my situation: I am the Chief Engineer at Carnegie-Mellon
Universities' campus radio station WRCT. Our studio is located 600 feet (line
of sight) from our transmitter, which is located atop a near by building. I
would like to devise a a way of relaying audio at 15-16khz between the studio
and transmitter. I have looked at STL's (Studio to Transmitter Link's which
work via microwave). There are two problems I have encountered with STL's: 1)
Expensive ~$6500 + $1000 for the antenna's. 2) It is almost impossible to get
a clear frequency in Pittsburgh. You might be wondering "How do you relay the
audio now ?". Unfourtunatly our audio is run through 2000' of  9 pair
shielded "mic" cable (through a conduit along with the power feed for the
building (none of this was my idea it was like this when I got there)). As
you may imagine our air signal is less then optimal (read not very
transparent). Another option is the use of two 15khz balanced broadcast lines
rented from the phone company. But at $4000 per year - no thanks.
   Here are my requirements:
Bandwidth- 15khz
Signal to Noise- above 60db (can be lower if necessary)
Realibility- Works under all conditions and almost never dies

   Am I asking for too much? Should I go beg for an allocation and buy the
STL? Better yet is there a way to send an audio signal of very good quality
(transparent, high S/N, 15khz bandwidth) over a 2000' run of mic cable (for a
relitivly low cost) ? If someone could figure out a way of doing this they
could make a killing in the broadcast industry. Many thanks.

												Joey
Gottlieb
												Chief
Engineer
												WRCT-FM

												Pittsburgh