History
This amplitude modulation (and vestigial SSB modulation) energy-saving mode was devised in the late 1930s. DCC was not implemented in transmitter designs until the 1980s, because of some of the complexities of the control circuit.
- DCC's appearance is linked to NATO nations trying to save energy as a result of the ripple effects of OPEC related oil supply crises.
- DCC is still an option on all shortwave transmitters sold on the open market today, but it is almost universally mandated by those purchasing the shortwave transmitters.
- Eastern European manufacturers of shortwave transmitters never adopted DCC because Russia in particular had no energy crises, due to its abundant supply of oil.
Read more about this topic: Dynamic Carrier Control
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