[BC] STL antenna mounting

[Broadcast List USER]

I would want to have the STL two-wavelengths from the FM to avoid  
distorting the FM pattern, or putting FM (3 meter) energy into the  
STL.  I believe the STL antenna screwing up the FM pattern is a  
bigger problem than the RF from the FM screwing up the STL.

Even many Volts of 3-meter energy should do pretty much nothing into  
the 0.32 meter STL.

Having written that, I have never had any experience with Starlink,  
but have read some pretty weird things about it.  I'm not sure they  
could all be true.

You can always improve the STL antenna to keep the FM from getting  
into it from below.

--chip

On Mar 2, 2009, at 10:00 PM, broadcast-request at radiolists.net wrote:

> Message: 11
> From: "radioranger" <radioranger at comcast.net>
>
> I'm working on a project to mount an FM transmit antenna and an STL  
> receive
> antenna on an existing tower, probably on the same leg. Given the path
> geometry it's necessary to mount the STL receive antenna as high up  
> the
> tower as possible, but I want to avoid desensing the receiver with FM
> energy.  The STL system is a Moseley Starlink, and I've been reading
> comments here and have some personal experience with AM noise  
> generated by
> various sources wreaking havoc on digital STL signals.  I know this is
> subjective, but how close would you mount an STL dish next to an FM  
> array?
>
> Steve Brown
> Radio Rangers
> Minneapolis,MN