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The station's initial frequency was 890 kHz AM, in 1935 moving to 860 kHz, then in 1978 to 864 kHz. The "HO" derives from the surname of the founder of the station Ron Hope, not Hobart as many may believe.
On 1 November 1990, 7HO converted to the FM band - 101.7 MHz. The official call-sign was changed to 7HHO but the station identified on-air as "Mix 101 HOFM". It then rebranded as "HOFM", and on November 5, 2007, it re-added the "7" to its branding, changing its on-air name to "7HO FM".
Cooke and Moore Show
The station's breakfast comedy show was for many years hosted by Bob Cooke and Richard Moore. The show started in 1982. Cooke retired in the late 1990s and became a hobbyist woodworker. Moore retired in 2013.  Prior to working together on the radio show, Cooke and Moore had hosted a television show for children on Hobart's TVT-6 and performed as a stage act.
The Cooke and Moore Show's style of comedy was consistently lowbrow and was very similar to that of Daryl Somers during his tenure as the host of Hey Hey It's Saturday. Cooke and Moore also played a number of fictional character on-air, including Mickey Finn and Knocker Knowles (a shady used car salesman and his dim-witted, former AFL footballer accomplice), Vinnie and the V8s (a music group best known for their hit song 'Outside Coles on a Saturday Night'  ), Whimmo the Wonder Clown and the R-Rated Cowboy. Much of Cooke and Moore's humour involved general banter between them in the guises of their various characters. Their humour also characteristically featured heavy use of crudeness and sexual double-entendres.
The Hobart Jingle
7HO is famous in London for being mentioned on an advertising jingle for Hobart. Originally played for amusement on Capital Radio during the morning by Chris Tarrant, the jingle quickly became a running gag. This culminated in Chris Tarrant doing a tour of Australia, finishing with broadcasting his morning show to Londoners from the studios of 7HO in Hobart on the last day of his tour.
- "7HO Opened". The Mercury. 14 August 1930. p. 10. Retrieved 18 November 2010.
- "New Wave Lengths". The Sydney Morning Herald. 30 August 1935. p. 11. Retrieved 25 April 2010.