At a number of hamfests the ARRL Lab booth tested radios being used
by amateurs at the hamfest. The results were consistent with what had been
found in lab testing. In those tests the transmitters of not ONE used portable
transceiver made by a "major" manufacturer was found to be out of specification
with regard to signal purity. Quite the opposite was found in the large field of
inexpensive radios imported from the Pacific Rim.
This is the reprint from the November 2015 QST.
73, Kermit W9XA