[Elecraft] scopeing filters for eventual diversity receive.

Radio Amateur N5GE n5ge at n5ge.com
Sat Mar 27 20:05:42 EDT 2010


On Sat, 27 Mar 2010 15:09:02 -0700, "Ed Muns" <w0yk at msn.com> wrote:

I matched all of my 8 pole filters by using the NGEN noise generator
and setting them for matching white noise pitch.

It seemed to work for me.

TOM, N5GE BT

73 ES GUD LUK
AR DE N5GE SK

[snip]
>
>The 8-pole filters are described as having "a nominal 0 offset" and do not
>need to be matched for diversity.  However, my 400Hz 8-poles are offset by
>as much at 80Hz.  The ordering page doesn't provide for matching 8-pole
>filters.  This is only an issue for the narrow filters and only if the
>offset delta between the two filters is greater than 10-20Hz.  If two 8-pole
>filters are offset, say, +60Hz and +80Hz, then you configure both for an
>offset of +70Hz and will be fine for diversity receive.
>
>Ed - W0YK
[snip]



More information about the Elecraft mailing list