[R-390] 600 Ohm External Speaker

[K PERALES]

Thanks for all the information provided by so many. As Roy Morgan and a couple others pointed out once I attached pictures of the back of my 390 the way I  originally received it, I already have what turns out to be a nice acceptable transformer already which my habit of hanging on to way to much stuff, I found in a drawer.  It even shows me which contacts it was hooked up to.  Now all I have to do is wait for my modern ham speaker to arrive and try hooking it all up.  I was trying to introduce my Grandson to the joys of the R-390 and Morse Code and it will be easier with a speaker than trying to share a headphone while actively hunting for one of you ham operators while on the air.  Harder than it was in Nam searching for VC and NVA signals.  Three years of listening to them, the Chinese and Russian left me hooked for like listening in to other people.  US Army Security Agency all the way.  IN GOD WE TRUST, ALL OTHERS WE MONITER. 

Ken