[TenTec] Centering Orion II Roofing Filters

[Barry N1EU]

Just feed the Orion audio into a soundcard and run spectrum analysis
software.  Vary the offset until you see the passband centered over
the sidetone frequency.  Very quick, very easy.

73,
Barry N1EU

On 10/16/07, Ron Castro <ronc at sonic.net> wrote:
> I have an old 'boat anchor' signal generator that I use, but you can also
> use another rig running into a dummy load or a local ham you can hear on
> ground wave who can put out a dead carrier for a few seconds.  I found that
> no adjustment was needed, even on the 300 Hz filter.  After tweaking the
> settings, the defaults were still the best.

> > It seems that one really needs a stable steady
> > signal, both in frequency and level to do this job.
> >
> > Short of homebrewing a crystal calibrator (since
> > these seem to be few are far between these days,
> > even on ebay), what do people use for a good steady
> > signal source for this job.  Off the air signals
> > seem to have enough QSB to be a problem and without
> > a second rig to use for a source, I was curious
> > what other people used...