I have found , that these transistors will work in both sets BUT, if the ones used in sony's are bad along with the two regulator and you can't hold your finger on the regulators for more than 7 seconds , replace them with the original. they will work in some and not others as far as sony goes , but I haven't had any trouble with them being used in rca's ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/