Hey OM:

I beg to differ there are frequencies below ZERO hertz you are just
not aware of them.

Simply put the frequencies add and subtract, towit below ZERO. When
mixing frequencies they add and subtract there is no doubt about it.
So it must be for all cases.

If I take 2 frequencies and mix them I get the Sum and the Difference
of those frequencies plus the original frequencies. NO?

Tell me this is wrong?

Because that is what you have just told me?

73 OM
de n8zu


There are no frequencies below zero. *When you are using only a single
mixer, both sidebands will produce frequencies above zero. *And there
will be no suppression of the "unwanted" sideband.
(the synchronous AM detector is a dual-sideband detector)