He was sentenced under his real name, Chris Ryder, at Chelmsford Crown Court after pleading guilty to five charges of breaking the law relating to undischarged bankrupts, and for breaching a 1993 suspended sentence for obtaining property by deception.
Ryder, 40, pleaded guilty to obtaining a car on credit without declaring he was a bankrupt.
A spokeswoman for Capital Radio said yesterday that the station had believed Mr Ryder was seriously ill when he resigned.
He was originally with Talk Radio, when that station sought a controversial image and had been at Capital for a year.
His agent, David Harn, said the sentence was "totally inappropriate".