[TowerTalk] Topband: Filters for Detector

[Richard (Rick) Karlquist]

Mike Waters W0BTU wrote:
> --- On Sat, 6/20/09, Richard (Rick) Karlquist <richard at karlquist.com> wrote:
> 
>> From: Richard (Rick) Karlquist <richard at karlquist.com>
>> Subject: Re: Topband: Filters for Detector

>>
>> The gotcha here is that the filters would have to be
>> matched, or
>> they will decrease the accuracy.  Matching high
>> selectivity BCB
>> filters is a tall order, and no one sells matched sets.
>>
>> Rick N6RK
>>
> 
> Hello Rick,
> 
> Maybe I'm missing something that should be obvious, but I can't see where filter impedance matching should necessarily be a 'tall order'.
> 
> There are many ways to match impedances, 

"Matched" refers to the filters having identical response
to each other.  As opposed to matching the characteristic
impedance of the system they are in.

Rick N6RK