Any AM radio with an earphone output can be used to drive an FM transmitter.

For FM transmitter kits see URL:
http://www.hobbytron.net/Mini-FM-tra...tter-bug-kit.h
tml

http://www.hobbytron.net/mini-miniat...ansmitter.html

--
El Hornet Verde
------------------------------------------
"Denny" wrote in message
...
Hi, I hope this is the right group for this post.
I work in a busy warehouse with allot of battery powered equipment that
causes interference in AM broadcasts.
What I want to do is make a box that receives AM stations and
rebroadcasts the signal on a small FM transmitter (on a unused
frequency ).
This way I can listen to baseball and hockey games while I work.
Does anyone have an idea on how this can be done? How much it would
cost
and what it involves?
Any info would be appreciated. Thanks in advanced. Denny

Any AM radio with an earphone output can be used to drive an FM transmitter.

For FM transmitter kits see URL:
http://www.hobbytron.net/Mini-FM-tra...tter-bug-kit.h
tml

http://www.hobbytron.net/mini-miniat...ansmitter.html

--
El Hornet Verde
------------------------------------------
"Denny" wrote in message
...
Hi, I hope this is the right group for this post.
I work in a busy warehouse with allot of battery powered equipment that
causes interference in AM broadcasts.
What I want to do is make a box that receives AM stations and
rebroadcasts the signal on a small FM transmitter (on a unused
frequency ).
This way I can listen to baseball and hockey games while I work.
Does anyone have an idea on how this can be done? How much it would
cost
and what it involves?
Any info would be appreciated. Thanks in advanced. Denny

What I would do, is;

1) Mount several -(2)- AM radios in a weatherproof enclosure on roof,
take the output of each through a shielded cable to an impedance
matching transformer or in line match then to a (1) stereo FM
transmitter. Each AM radio is either right or left channel inputed to
transmitter. That gives you 2 AM frequencies per FM transmitter if you
have a stereo receiver.

2) Same idea as above, but output goes to both sides (L+R) of FM
transmitter. Can be used with any FM receiver, but costs more...

Do a search for FM transmitters, there are many to be found, from kits,
to digital ready made..

As a final thought, the RF FM output should go to a set of vertical
antennas mounted upside down (ground plane to ceiling) located centrally
in building for best coverage. Depending on output power and radiated
signal, you should have ample coverage.

Bob N9LVU




Denny wrote:

Hi, I hope this is the right group for this post.
I work in a busy warehouse with allot of battery powered equipment that
causes interference in AM broadcasts.
What I want to do is make a box that receives AM stations and
rebroadcasts the signal on a small FM transmitter (on a unused frequency ).
This way I can listen to baseball and hockey games while I work.
Does anyone have an idea on how this can be done? How much it would cost
and what it involves?
Any info would be appreciated. Thanks in advanced. Denny

What I would do, is;

1) Mount several -(2)- AM radios in a weatherproof enclosure on roof,
take the output of each through a shielded cable to an impedance
matching transformer or in line match then to a (1) stereo FM
transmitter. Each AM radio is either right or left channel inputed to
transmitter. That gives you 2 AM frequencies per FM transmitter if you
have a stereo receiver.

2) Same idea as above, but output goes to both sides (L+R) of FM
transmitter. Can be used with any FM receiver, but costs more...

Do a search for FM transmitters, there are many to be found, from kits,
to digital ready made..

As a final thought, the RF FM output should go to a set of vertical
antennas mounted upside down (ground plane to ceiling) located centrally
in building for best coverage. Depending on output power and radiated
signal, you should have ample coverage.

Bob N9LVU




Denny wrote:

Hi, I hope this is the right group for this post.
I work in a busy warehouse with allot of battery powered equipment that
causes interference in AM broadcasts.
What I want to do is make a box that receives AM stations and
rebroadcasts the signal on a small FM transmitter (on a unused frequency ).
This way I can listen to baseball and hockey games while I work.
Does anyone have an idea on how this can be done? How much it would cost
and what it involves?
Any info would be appreciated. Thanks in advanced. Denny

What I would do, is;

1) Mount several -(2)- AM radios in a weatherproof enclosure on roof,
take the output of each through a shielded cable to an impedance
matching transformer or in line match then to a (1) stereo FM
transmitter. Each AM radio is either right or left channel inputed to
transmitter. That gives you 2 AM frequencies per FM transmitter if you
have a stereo receiver.

2) Same idea as above, but output goes to both sides (L+R) of FM
transmitter. Can be used with any FM receiver, but costs more...

Do a search for FM transmitters, there are many to be found, from kits,
to digital ready made..

As a final thought, the RF FM output should go to a set of vertical
antennas mounted upside down (ground plane to ceiling) located centrally
in building for best coverage. Depending on output power and radiated
signal, you should have ample coverage.

Bob N9LVU




Denny wrote:

Hi, I hope this is the right group for this post.
I work in a busy warehouse with allot of battery powered equipment that
causes interference in AM broadcasts.
What I want to do is make a box that receives AM stations and
rebroadcasts the signal on a small FM transmitter (on a unused frequency ).
This way I can listen to baseball and hockey games while I work.
Does anyone have an idea on how this can be done? How much it would cost
and what it involves?
Any info would be appreciated. Thanks in advanced. Denny