MadRat
Lifer
Thunderbird/MP/XP
Take a look at the link above. The MP and Thunderbird use the older ceramic packaging. The XP uses the new PCB packaging. I may be misjudging the sizes of the core here, but the MP and XP look like different sized cores, too.
Take a look at the link above. The MP and Thunderbird use the older ceramic packaging. The XP uses the new PCB packaging. I may be misjudging the sizes of the core here, but the MP and XP look like different sized cores, too.