[FSG-public] Baofeng and why you don't want to use one.

[Jon Pearl - W4ABC]

Here's Ron's response to Bryan's post of the same subject on the TARC 
reflector:

Here couple spec anal test of my UV5R on high power, one on 2m/VHF and 
the other at 448 MHz/UHF.

The 2nd harmonics are over 40 db down.

I think in the YouTube video the spec anal was being over loaded, a 
common mistake made when testing a device.  To check this one should 
attenuate the signal to see if the ratio of the fundamental to harmonic 
levels change.  If after putting in 10 db attenuation and the 
fundamental reduces by 10db, but the harmonic say by 30 db this would 
indicate overloading the spec anal front end and the harmonics are 
generated inside the spec anal.

We have seen the test the ARRL has done on these Chinese radios and the 
results aint all that good.  I am sure yur UV5R would show different 
results, some better, some not better. What can we expect from a $30 HT, hi.


73, ron, n9ee/r a know code Extra

Ron Wright, N9EE/R
BSEE
Micro Computer Concepts
352-683-4476
mccrpt at tampabay.rr.com




On 12/8/2016 1:43 AM, Bryan Fields wrote:
> https://www.youtube.com/watch?v=Vn_jKSJXK5U
>
> This is some testing for the harmonics and spectral purity of the popular
> Baofeng UV-5RA radio.  This failed both amateur standards and commercial (part
> 90) standards for harmonic suppression.
>
> I bought this off Amazon this week for 25 or 30 dollars.  It's ok to receive
> with, but it's in no way legal to use for transmit.
>
> 73's



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