[Fists] re kc9brz zero beat

[David Ring]

With transcievers that have computer controlled i.f. stages, it is
possible to "make" a filter of 50 Hz wide.  You can "zero beat" or
"net" a signal simply by getting the received signal into the passband
of that filter.  Then you will be very close!  Of course, RIT, XIT and
separate VFOs have to be off!

You can also do this with a sharp audio filter such as MFJ used to
make and several manufacturers still make.

73

David N1EA


On Dec 27, 2007 12:34 AM,  <AC5SH at aol.com> wrote:
> Here's the deal. Just trurn on the spot tone  and match it up as close as
> you
> can. With RIT and  XIT off, that's same frq, "Zero Beat". If you're having a
>
> bad day, this can be difficult. The way to check it is to  get as close as
> you
> can with RIT and XIT off, then  throw in a narrow filter. If the other
> station
> dissapears, you missed. You don't have to be perfect and honestly,  within
> 100 cps or so is close enough, most of the time. Closer  is better  though.
> 73
> Tim,  AC5SH