"William I. Walsh"
m wrote
in message
...
Hello all...

So I was putting up an FM antenna recently and got the
idea that using a
signal amplifier might be a good idea, as the output would
go to two tuners,
one of which is somewhat "deaf" in terms of sensitivity.

The amplifier in question is a Radio Shack 15-321. It's a
two-in-one unit,
with two pieces. One goes on the antenna and has an
adjustable amplification
level that is set via a potentiometer on the indoor unit.
The other is
internal to the indoor unit and offers a fixed boost that
can be turned on
or off. Power is supplied to both through the indoor unit.

What I've noticed is that some stations just disappeared
from the dial after
installing the signal amp. This is not a big deal, the amp
works well
otherwise and I'm not missing the stations that don't come
in. The user's
guide points this out as being a possible problem, and it
says that the only
solution is to completely remove the amplifier. What it
doesn't say is "why"
and that is what I would like to know. By the way,
missing stations are not
confined to any one area of the FM band.

William

Could the amplifier possibly have and FM trap built in? This
is common in many amplifiers designed for TV use. A quick
look at the user manual says there is a switchable trap on
this model. How is the switch set?

David