How do radios work?

Status
Not open for further replies.
Joined
May 5, 2006
Messages
33
When I pick up transmissions from police or EMS say 15 miles from me, am i picking up a signal broadcast directly from their radio or does the radio send a weak signal to something that amplifies it to a broader area?

Is it the same type of operation for trunked systems as conventional frequencies?

Thanks
 
Joined
May 5, 2006
Messages
33
excellent! but what about the radio from best buy and such? GMRS i think it is? those are just broadcast from the radio henforth the range limitation correct?
thanksagain
 

mancow

Member
Database Admin
Joined
Feb 19, 2003
Messages
6,335
Location
N.E. Kansas
Correct...they are generally limited to 1/2 a watt and a small fixed antenna. They aren't operating through a repeater either, it's unit to unit.
 

trace1

Member
Joined
Jan 13, 2006
Messages
777
Location
EM73co
mancow said:
Correct...they are generally limited to 1/2 a watt and a small fixed antenna. They aren't operating through a repeater either, it's unit to unit.
Wrong...

FRS is limited to 1/2 watt and a small fixed antenna not GMRS.

CSL126 said:
I think it is possible to set up a GMRS repeater, if you obtain a license first. Right?
An FCC license is needed to legally transmit, and yes you can set up your own GMRS repeater.
 

mancow

Member
Database Admin
Joined
Feb 19, 2003
Messages
6,335
Location
N.E. Kansas
He did say (RADIOS FROM BEST BUY AND SUCH). That would lead me to think FRS but the fact remains the same. They are fixed antennas and low power.

:roll:
 

trace1

Member
Joined
Jan 13, 2006
Messages
777
Location
EM73co
mancow said:
He did say (RADIOS FROM BEST BUY AND SUCH). That would lead me to think FRS but the fact remains the same. They are fixed antennas and low power.
True...

However that'd most likely be the FRS/GMRS hybrids (bubble-packs) that most have 1/2 watt on FRS and 1 watt on GMRS but you're right on the fixed antenna and low power part.
 
Status
Not open for further replies.
Top