[Elecraft] Band Pass Filters

[Geoffrey Mackenzie-Kennedy]

Julius N2WN wrote:

> I'm looking to modify a MFJ-1025 (ala W8JI) and need
> to build a couple bandpass filters. My first thought
> is to "steal" the filter from the 160M Elecraft board,
> heck it works great. I do not have the parts for that
> on hand. I do have the parts for the filter in the
> KPA.
>
> Other than power handling, what are the differences
> between the two? Is the shape significantly different?
>
>
> I don't have BCB issues at this point, but the preamp
> in the MFJ is wide open to out of band noise.

---------------------------------------------------------

Possibly I misunderstand you Julius, but the filters in the KPA100 working 
at 80m - 10m are Low Pass. Does it use a Bandpass filter on 160m?

If you are looking for a filter to knock down MF BC signals if the need 
arises but pass 160m, I can if you like send you circuits for either High 
Pass or Bandpass filters - the latter of course attenuate signals / noise 
above and below 160m.  Please let me know off-list.

73,
Geoff
GM4ESD