You could also seek out Alan Kafton's "Cable Cooker" or someone with that device-I'm sure that one has the ability to burn in phono cables. Other alternatives might be (not sure whether they have the capability to deal with a mini-din phono) the Nordost cable burner or Jim Hagermans Fry Cleaner.
As Albert has pointed out, the low level signal from most phono cartridges (and particularly low output MC's) is, in many people's opinions not enough to ever fully burn in the phono cable. That, combined with something like cryoing the cable (I recently bought a new cryoed phono cable from Gene at Take Five Audio who offers the added value service of burning the cable in on the cable cooker which is a superb service as far as I'm concerned) makes burn in of the phono cable even more important.
As Albert has pointed out, the low level signal from most phono cartridges (and particularly low output MC's) is, in many people's opinions not enough to ever fully burn in the phono cable. That, combined with something like cryoing the cable (I recently bought a new cryoed phono cable from Gene at Take Five Audio who offers the added value service of burning the cable in on the cable cooker which is a superb service as far as I'm concerned) makes burn in of the phono cable even more important.