I have both a 5AXP4 and 8XP4 and each is handy for different kinds of sets. Here are little articles about them:
http://www.antiqueradio.org/5AXP4PictureTube.htm
http://www.antiqueradio.org/8XP4PictureTube.htm
The 5AXP4 does not need that ion trap magnet, as Bob noted.
Stusynder, if you don't need that ion trap, would you like to sell it to me? It looks exactly like the one used in my Admiral 24C15 and I would like to do a little experiment with an alternate magnet. You can send a PM or send me email by going to
http://antiqueradio.org/contact.htm .
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html