[sdiy] simple schematic to convert line level signal to phono

[Peter Blackett]

Hi,
sorry if this is off topic.I'm jyst wondering if anyone knows of a
simple circuit to convert standard line level audio signals to a phono
input ?
I know that there is the riaa eq curve for phono inputs .
why am I asking you say ?
well I've been asked to repair a couple of Wurlitzer Juke box amplifiers
, and these have inputs for magnetic cartridges rather than the later
versions with inputs for cd .
Ideally I'd be hoping for a passive circuit [ I know the siganl needs to
be reduced in amplitude by maybe 50 times ].
If there aren't any circuits available then I'll have to try designing
something myself , but I don't want to reinvent the wheel ! 
regards Peter