W-5M part 54-32, 900vct transformer

[Pat Powers]

I am a newbie looking for a power transformer for my Heath W-5M.I am just realizing that most people on this list are Radio folks so I hope I don't offend anyone.The specs on the xformer are 117V  900vct (455-0-455)  140mA  5V/3A  6.3v/4A. Thanks for the earlier responses but unfortunately my computer went down and I lost all of them.Sorry to waste anybody's time and grateful for any sources or clues.
                                        Thanks,
                                                    Pat 
P.S. what is 73?

Listserver Subscription:listserv at listserv.tempe.gov - "subscribe heath 'name' 'call'"
Listserver Submissions: heath at listserv.tempe.gov
Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"