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Radio Broadcast Technical Consulting and Sales
10032 Island Drive, Brainerd, MN  56401


Technical Tips from Mark W. Persons

FM RF Low-Pass Filter

A client came to us with a problem where his FM translator was causing interference to a 450 MHz two-way radio system.
The solution was to attenuate the translator's RF harmonic in the 450 MHz communications band to a much lower level.
We used a Broadcast Concepts low pass filter board in an RF tight box with N connectors.
The specifications are listed on one side of the filter and they are fairly impressive.  We custom build this kind of item on a regular basis.
This one is for up to 250 watts
and went to the client for $236, including a high quality N to N jumper cable. 
Filters for up to 800 watts can be built in a similar fashion.

The stories go on and on.  Stop in again sometime.  I'll leave the soldering iron on for you. 
Mark W. Persons   Ham WMH      

Questions?  Email Mark Persons:  teki@mwpersons.com        

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page last edited 02/22/2016