[BC] am receiver for monitoring at a 20 KW site.

[Mike McCarthy]

Our first attempt will be with a Belar loop with an amplifier and
multi-pole and sectioned filter all in the same enclosure. It will feed a
Carver TX-11a located within the Faraday caged studios where the ambient
RF is less than 200mV, but more than 10V outside the cage.

Along with the issues with designing the deep notch filters (>60dB) will
be decoupling the shield. We'll likely need a 1:1 transformer wound on a
big suitable toroid to minimize losses and maximize Q on the RX side of
the pre-amp/filter.

If that doesn't work, the 2nd effort will likely involve using some
canceling method employing another loop or "long wire" where the 2nd
antennal would be the undesired signal source and it too would be notched,
but on the desired side so we get a very clean mix between the two
signals.

Yes...we have some serious work ahead of us....

MM

> On Tuesday 05 June 2012 12:30:13 pm Mike McCarthy wrote:
>> Just barely on the day signal.  Not yet tried with the night.
>
>> >  Same question.
>> >  How does it work on a FIM ?
>
>  That's not good !
>
>  Whatever you do, will be somewhat critical.
>
>  I've done this sort of thing before.
>  It's not as much the choice of receiver, as much as the
>  antenna, it's location, type, and orientation.
>  ( though I wouldn't expect a clock radio to suffice )
>
> --
> Cowboy
>
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