Aloha,
If you mean by "hot", the sensitivity specification, there should not
be much difference among like models at HF At VHF and up, then
the noise figure of the front end FETs can make unit to unit differences.
If the units have the rf and if stages properly alinged, they should perform
the same, including if filter performance. One obvious objection I have
with the import HF transceivers is the many optional filters offered for the
IF strips, but a lack of engineering of the rigs to compensate for the
greater IF insertion losses as the filters get more narrow. This doesn't
impact front end sensitivity, but it sure can make if hard to hear weak
signals that are converted to the if frequencies if the IF stage gains
are not hight enought to compensate for the optional narrow filter
insertion losses.
At least these are my opinions.
73 and Aloha,
Jim Reid, AH6NB (Happily retired on the Island of Kauai)
Hawaii, USA Email: jreid@aloha.net
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