Maker Pro
Maker Pro

am fm car radio antenna trimmer

D

dudley

Jan 1, 1970
0
does anyone out there know if there is still a way to trim the
antenna
to the car radio?. I know that i'm showing my age with this
statement, but i'm having trouble with the fm stations fading in and
out as i travel down the road.i thought that there should be a trimmer
somewhere on the radio to tune the stations in stronger. its been a
long time since i have worked on radios ,so maybe there is not a way
to do it anymore. i have a 95 jeep
with am/fm and they both drift in and out.changed the antenna --no
help
so if anyone out there has an idea i would like to hear from you.
thanks dudley
 
C

Charles Schuler

Jan 1, 1970
0
dudley said:
does anyone out there know if there is still a way to trim the
antenna
to the car radio?. I know that i'm showing my age with this
statement, but i'm having trouble with the fm stations fading in and
out as i travel down the road.i thought that there should be a trimmer
somewhere on the radio to tune the stations in stronger. its been a
long time since i have worked on radios ,so maybe there is not a way
to do it anymore. i have a 95 jeep
with am/fm and they both drift in and out.changed the antenna --no
help
so if anyone out there has an idea i would like to hear from you.

My guess is that the radio is acting up.
 
G

g

Jan 1, 1970
0
Charles said:
My guess is that the radio is acting up.

My guess is that the FM antenna/radio may be working normally. AM radios
used to have a trimmer associated with the high ipmedance/low resistance
(very short compared to AM wavelength) antenna. FM antennas are at or
near a quarter wave and probably don't have any trimming as the real
part of their impedance is pretty large and matching is a bit easier.

Also, it is common for signals to vary with position as fast as once per
half/wavelength of distance, which may describe what you are experiencing.

How about comparing with the operation of other FM/antennas moving
through the same region, is yours working significantly differently from
others?
g
 
C

Charles Schuler

Jan 1, 1970
0
g said:
My guess is that the FM antenna/radio may be working normally.

A snip from the original post: "am/fm and they both drift in and out"
 
B

Boris Mohar

Jan 1, 1970
0
does anyone out there know if there is still a way to trim the
antenna
to the car radio?. I know that i'm showing my age with this
statement, but i'm having trouble with the fm stations fading in and
out as i travel down the road.i thought that there should be a trimmer
somewhere on the radio to tune the stations in stronger. its been a
long time since i have worked on radios ,so maybe there is not a way
to do it anymore. i have a 95 jeep
with am/fm and they both drift in and out.changed the antenna --no
help
so if anyone out there has an idea i would like to hear from you.
thanks dudley

It has been a while. For AM there should be a trimmer hole somewhere close
to where the antenna cable enters the radio. The trick is to tune the radio
to a very weak station at low end of the band, somewhere between 550 and 600
KHz. Adjust the trimmer to best reception for that.
 
Top