General TV reception question

[moonlite]

One of the many TV's I have exhibits a strange symptom. It is located
in one of the kids' rooms and uses a small antenna on top of the TV.
The antenna is connected directly to the TV. Sometimes color is
intermittent. Some channels come on in black and white, and after
moving the antenna sometimes color returns, and sometimes it does not.
Can a weak signal cause this ? Picture otherwise is fine. Thanks

moonlite

 

[NSM]

One of the many TV's I have exhibits a strange symptom. It is located
in one of the kids' rooms and uses a small antenna on top of the TV.
The antenna is connected directly to the TV. Sometimes color is
intermittent. Some channels come on in black and white, and after
moving the antenna sometimes color returns, and sometimes it does not.
Can a weak signal cause this ? Picture otherwise is fine. Thanks

What happens if you hook it to a VCR/DVD?

N

 

[[email protected]]

Because the frequencies used to provide the color information are
slightly different from the ones that provide the b/w information, the
set may be picking up strong enough B/W signals and too weak color
signals, depending on the channel and the antenna orientation, shape,
room reflections, and phase of the moon.

Many older sets have a "color killer" control that if set marginally
can cause the color to drop out. The control was primarily to allow
killing the color circuits when a B/W signal was being transmitted by
the tv station, to eliminate color sparkling in portions of the B/W
picture. It may be a back panel adjustment if the set has one.

H. R.(Bob) Hofmann

 

[Jerry G.]

The problem is called bad reception. You most likely need an outdoor
antenna, or better a cable or satelite service to have proper
reception.

Jerry G.
======