[TowerTalk] 2m intermod filter placement

[Jim Lux]

On 5/11/14, 11:00 AM, Drax Felton wrote:
> I recently put up a phased set of four 2m meter antenna for EME to find out
> that the front end of my IC-9100 is being blasted by pager intermod.
>
> I got a notch filter for the frequencies involved from PAR Electronics.
> Question is now:   Where inline is the best place to put the filter?
>
>

Before the pre-amp, since (hopefully) the intermod is being created by 
overloading the input of the LNA.


Pray that you're not getting intermod ahead of the feedpoint (e.g. from 
rectification at a dissimilar metal junction).

>
> Before or after the mast mounted pre-amp?  Or down at the radio end?