The news headlines on the first show included Telford Development Corporation's plan to turn the town into Britain's Silicon Valley, cuts to Shropshire health services and a campaign by Labour MP Tam Dalyell over the 1984 murder of Hilda Murrell.
The launch was marked by a balloon flight from the grounds of Attingham Park at Atcham, and the day's programming continued with Colin Young, who remained at the station until 2020.
Ms Kemp said: "We got a grounding of 'these are the principles and this is the aim of the station', very much, I suspect, how you're still operating it – it's a local station, we exist for reflecting what goes on in the area."
"We got to help fashion it along the principles of what the BBC Local values are."
The presenter later worked on Midlands Today and is now professor of journalism at Birmingham City University.
She said the same ethos of public service journalism had run through all of her jobs: "In the end, it's to make a difference, to amplify voices, to help people hear their own stories."
Four decades on, the broadcaster reflected that the St. George's Day launch had been a career highlight.
"We were launching a radio station, and that felt such an extraordinary privilege.
"We all felt that on the day, and we were trying to do fun things, exciting things, give some of that energy to the programmes – but there's no escaping what an extraordinary privilege it was."
