HTs Spurious Emission

A quick test of HTs at 2/3/2018 club meeting.

Was for third harmonics only not a complete spurious emission test.

Transmit on 145.555 MHz, test on 436.665 MHz

25 µW = -16.02 dBm, see emission standards below.


Man Radio Power dBm on
436.665
Note
Yaesu FT-65 5 -68
Alinco DJ-195 4 -54 #1
Kenwood THF6 4 -48
Alinco DJ-195 4.5 -39 #2
Kenwood TH79A 4.5 -38
Yaesu FT-70D 4 -38
Wouxun KGUV6D 4.9 -33
Wouxun KGUV6D 5 -32
Yaesu FT-50R 4 -32
Yaesu FT-60 4 -32
Yaesu FT-60 4 -32
Baofeng UV-B5 4 -24
Baofeng BF-F8HP 1
-23
Low Power, Test 3 Powers
Yaesu VX-2 1 -22 High Power
Baofeng UV-5R 4.4 -20
Pofung UV-B5 4 -20
Baofeng UV-6 4.2 -19
Yaesu VX-2 0.1 -17 Low Power
Baofeng UV-5RE 4.5 -16 Border line
Baofeng UV-5R 4.5 -15 Fail
Baofeng UV-82 4.25 -15 Fail
Baofeng 997-S 4.8 -14 Fail
Baofeng BF-F8HP
6
-14
High Power Fail
Baofeng BF-F8HP 4.3
-14
Med Power Fail
Baofeng UV-5R 4 -10 Fail



Watt To dBm Conversion Table
Power (watt) Power (dBm)
0.00001 W -20 dBm
0.0001 W -10 dBm
0.001 W 0 dBm
0.01 W 10 dBm
0.1 W 20 dBm
1 W 30 dBm
10 W 40 dBm
100 W 50 dBm
1000 W 60 dBm
10000 W 70 dBm

6 W = 37.78 dBm
5 W = 36.99 dBm
4 W = 36.02 dBm
3 W = 34.77 dBm
2 W = 33.01 dBm
1 W = 30.00 dBm
0.5 W = 26.99 dBm
0.25 W = 23.98 dBm



§97.307 Emission standards.

(d) For transmitters installed after January 1, 2003, the mean power of any spurious emission from a station transmitter or external RF power amplifier transmitting on a frequency below 30 MHz must be at least 43 dB below the mean power of the fundamental emission. For transmitters installed on or before January 1, 2003, the mean power of any spurious emission from a station transmitter or external RF power amplifier transmitting on a frequency below 30 MHz must not exceed 50 mW and must be at least 40 dB below the mean power of the fundamental emission. For a transmitter of mean power less than 5 W installed on or before January 1, 2003, the attenuation must be at least 30 dB. A transmitter built before April 15, 1977, or first marketed before January 1, 1978, is exempt from this requirement.

(e) The mean power of any spurious emission from a station transmitter or external RF power amplifier transmitting on a frequency between 30-225 MHz must be at least 60 dB below the mean power of the fundamental. For a transmitter having a mean power of 25 W or less, the mean power of any spurious emission supplied to the antenna transmission line must not exceed 25 µW and must be at least 40 dB below the mean power of the fundamental emission, but need not be reduced below the power of 10 µW. A transmitter built before April 15, 1977, or first marketed before January 1, 1978, is exempt from this requirement

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