Dico,

What problem are you trying to cure?

If you have "popping" type of static in your Com/Nav receiver, then you
have a bad shield on a spark plug, or poor shielding on your P-leads
where they run from the mag to the mag switch. Noise filter on the
alternator wont do anything for this...

If you have audible strobe squeal which goes away if you turn off the
strobes, ditto... This requires work in the audio wiring and possibly in
the strobe cabling .

If you have alternator howl or whine which varies with engine speed, and
goes away if you turn off the ALT field, then a noise filter installed
on the alternator is unlikely to do much, either... This means that
your audio wiring (audio panel, intercom, mic/headphone jacks) need
attention.

If you have "hash" type noise on the Com/Nav receiver, then see if it
goes away when the engine is stopped (on the ground). If it does, then
it is likely induced by mechanical vibration. Bad antennas, bad coax
fittings, radios not properly seated in the rack can cause this.

About the only symptom which installing a filter on the alternator is
likely to cure is if you have "hash" type noise when listening to
200-400Khz on your ADF receiver.

MikeM
Skylane '1MM
Pacer '00Z




Dico Reyers wrote:

Hi There,

We have a 1966 mooney m20e.

We're just in the process of putting in a noise filter so that it will
hopefully reduce some of the static on the radio.

I'm wondering if the filter goes between the generator and the voltage
regulator.... or if the filter goes between the voltage regulator and
the buss.

Any help would be appreciated,

Thanks...

-Dico