I thought this was very helpful for me.
http://www.williamson-labs.com/480_dsb.htm
It shows that in DSB-SC... both sidebands are transmitted (they are RF)
and that no carrier is ever transmitted. The carrier would have to be
added back at the receiver. I believe that would have the same critical
tuning issues as SSB.

I'm not sure why anyone would want to do this as all the intelligence
is contained in a single sideband anyway.

So it appears that DSB-SC is not much different than SSB-SC. I guess
that really figured.

I was wrong in using DSB-SC and a mode that is basically AM (with a
greatly reduced carrier that increases via modulation) interchangeably.
It now is apparent they are not the same.

www.telstar-electronics.com