Roy,

It has been a while since I read it, but isn't the bulk of the requirement a
field strength number? I run a validation department and we measure field
strength for our products. If there is a section of part 15 which gets
specific (like I think the old 136 KHz part or the AM band where a power and
antenna IS specified, then he's ok. Otherwise he'll have to measure field
strength.

--
Steve N, K,9;d, c. i My email has no u's.

"Roy Lewallen" wrote in message
...
Assuming you're in the U.S., you need a copy of Part 15 of the FCC
rules, which deals with unlicensed transmitters among other things. I
imagine it's on the web these days -- if not, it's available from the
government printing office for a nominal charge.

Roy Lewallen, W7EL

stan wrote:
hello folks , hope someone can help me

i have built some 433MHz CW transmitters and used them for tracking
model airplanes and stuff so I can find them if they get lost , the
only ones i have built so far are only a couple of mW output , the
company make they low power modules say no license is required for
their use

ok , so now i want to build a higher power one for greater distance ,
thinking of using the linx modules which can either have 10mW or 50mW
output at 433MHz CW

my questions

1) as power increases at some point i will need to get a technician
class license , no problem as i will do that , but my question is at
what power level is this required ? can you point me to where this
is defined ?

2) i know building little transmitters for sale as a product requires
an FCC registration number ... but building only a couple for your own
use does not .. correct ? ( if so hams couldn't ever build their own
transmitters )

thanks for any assistance ... stan