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John - KD5YI

wrote:
John - KD5YI wrote:

You are wrong about the FCC limits on 13 MHz. There is no mention of 10,000
uV/m. Here are the limits:

Sec. 15.225 Operation within the band 13.110-14.010 MHz.

(a) The field strength of any emissions within the band 13.553-

13.567 MHz shall not exceed 15,848 microvolts/meter at 30 meters.

(b) Within the bands 13.410-13.553 MHz and 13.567-13.710 MHz, the

field strength of any emissions shall not exceed 334 microvolts/meter at

30 meters.

(c) Within the bands 13.110-13.410 MHz and 13.710-14.010 MHz the

field strength of any emissions shall not exceed 106 microvolts/meter at

30 meters.

You are also wrong about the power level required to achieve these limits.
The power required is much lower.

Cheers,
John

There appear to be two sets of part 15.225 rules floating around.
http://frwebgate.access.gpo.gov/cgi-bin/get-cfr.cgi?TITLE=47&PART=15&SECTION=225&YEAR=2001&TYP E=TEXT
shows:
"[Code of Federal Regulations]
[Title 47, Volume 1]
[Revised as of October 1, 2001]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR15.225]

[Page 726]

TITLE 47--TELECOMMUNICATION

CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION

PART 15--RADIO FREQUENCY DEVICES--Table of Contents

Subpart C--Intentional Radiators

Sec. 15.225 Operation within the band 13.553-13.567 MHz.

(a) The field strength of any emissions within this band shall not
exceed 10,000 microvolts/meter at 30 meters.
(b) The field strength of any emissions appearing outside of this
band shall not exceed the general radiated emission limits shown in
Sec. 15.209.
(c) The frequency tolerance of the carrier signal shall be
maintained within plus-minus0.01% of the operating frequency over a
temperature variation of -20 degrees to +50 degrees C at normal supply
voltage, and for a variation in the primary supply voltage from 85% to
115% of the rated supply voltage at a temperature of 20 degrees C. For
battery operated equipment, the equipment tests shall be performed
using
a new battery."

And
http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet63/oet63rev.pdf
Also shows the 10,000uV/M at 30M

Yet http://www.sss-mag.com/pdf/part15-91905.pdf
Dated sept 2005, shows the limits you quoted.

What is troubling is the FCC has different specs on different documents
at fcc.gov.

The first reference above appears to have been published in 2001. I can't
tell the publication date of your second reference.

Personally, I would take the 2005 publication date as gospel.

(snip remainder)