Probably if I was going to do any amount of transferring then i would go for something like this.
http://www.maplin.co.uk/Module.aspx?ModuleNo=98232But I have seen them cheaper in the past with the USB connection.
Playing old 78s will possibly be the problem, but if you read the details on this one, it says 78s are played at 33 speed then transferred to 78 speed with the supplied software.
However, my set-up is a stand alone record player (part of a stack system) plugged into the audio input of a hifi system.
Now because I don't have audio out on the hifi, I use the headphone socket to the PC audio in socket.
"But" to do this you have to have the correct record deck (Pre-amp or not Pre-amp) one will work the other won't.
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Don't fix it.