Topband: 160 AM BCB filter

[Richard (Rick) Karlquist (N6RK)]

> Subject: Topband: 160 AM BCB filter
>
> Nice filter for AM (1700 KHz) station reduction.
> 
> http://www.dallas.net/~jvpoll/Filter/TheAMBrickWall.html
> 

With .7 or .8 dB insertion loss, the power dissipation is
something like 15%.  The writeup seems to claim it can
be used in the transmit path.  It would get fairly warm
in a contest at 150W, and probably overheat at 1500W.
OK as a receive only filter.  Any serious 160 meter station
has a separate receive antenna path anyway.

I find that it is easier to build a 160 meter bandpass
filter than a high pass filter as described above.  Especially
if you only require 1.8 to 1.912 MHz.  I've never operated
above that.

Rick N6RK