Daryl John Dixon, 53, was charged in June and August over allegations he sexually abused three children - two females and one male - between 1985 and 1998 across Melbourne's suburbs.

Dixon did not appear at the Ballarat Magistrates' Court for a committal mention on Thursday. His lawyer, Adrian Paull, said Dixon was too unwell to attend court.

Charge sheets obtained by The Courier shows Dixon has been charged with 75 offences which include rape, sexual penetration of a child over the age of 10 but under the age of 16, indecent assault and committing an indecent act.

There are three charges of raping one child at Croyden South between March 1996 and March 1998, and one charge of raping another child at East Warburton in December, 1997.

There are more than 30 charges of indecently assaulting and committing an indecent act with a child and more than 35 charges of sexual penetration of a child.

Dixon faces two charges of making a threat to kill another person allegedly occurring in the late 1980s and early 1990s. The case was adjourned until October for a committal mention and Dixon's bail was extended.

He is charged with summary offences relating to possessing child pornography which has proceeded to a plea hearing. It was also adjourned to October for a Forensicare report to be prepared.

The Knox Sexual Offences and Child Abuse Investigation Team carried out the investigation.

If you are seeing this message you are a loyal digital subscriber to The Courier, as we made this story available only to subscribers. Thank you very much for your support and allowing us to continue telling Ballarat's story. We appreciate your support of journalism in our great city.