Steve Nosko wrote:
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.

Yes, virtually all the part 15 specifications are field strength.
However, if the power is known, the field strength can often be
approximated by modeling or by making some assumptions about antenna
gain and efficiency. Accurate measurement of field strength isn't trivial.

Roy Lewallen, W7EL

Steve Nosko wrote:
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.

Yes, virtually all the part 15 specifications are field strength.
However, if the power is known, the field strength can often be
approximated by modeling or by making some assumptions about antenna
gain and efficiency. Accurate measurement of field strength isn't trivial.

Roy Lewallen, W7EL

Roy Lewallen wrote:
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.

http://wireless.fcc.gov/rules.html (which has links to all Parts of the
FCC rules.)
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com

Roy Lewallen wrote:
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.

http://wireless.fcc.gov/rules.html (which has links to all Parts of the
FCC rules.)
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com

This is probably useless info but I used to have a couple of wx
radiosonds that transmitted on that freq.

Mike K8MB

This is probably useless info but I used to have a couple of wx
radiosonds that transmitted on that freq.

Mike K8MB

Mike Burch wrote:

This is probably useless info but I used to have a couple of wx
radiosonds that transmitted on that freq.

Mike K8MB


The last one I saw launched was on 403 MHz. 433 would be in the ham band
between 420 to 450 MHz. Last launch was last year by the way.

7 3
Reed - VE1NU

---

Looking for information on Marconi SMR3 and
Northern Electric R8119A receivers of WW 2.

Mike Burch wrote:

This is probably useless info but I used to have a couple of wx
radiosonds that transmitted on that freq.

Mike K8MB


The last one I saw launched was on 403 MHz. 433 would be in the ham band
between 420 to 450 MHz. Last launch was last year by the way.

7 3
Reed - VE1NU

---

Looking for information on Marconi SMR3 and
Northern Electric R8119A receivers of WW 2.