Hi all! I just bought a SP-600 here in Sweden. It's a SP-600-JX, no numbers after the JX and the s/n is 1362. The set is in good condition, seems to be unmodified (except for replaced capacitors). Works ok as far as I can tell. Does anyone have any information about this model? Anything in particular that I should check? 73 de Arne/SM2EJB