[R-390] R-390 rack slugs question

[frank hughes]

Hi,
I am still working on bring an R-390 back to life. (Hamfest basket case
find)

http://i180.photobucket.com/albums/x257/fish1_07/R-390/hamfest_R390_zpsee45b7ab.jpg

It now has B+ regulated and stable, and can sort of receive a signal on
some bands
(but the signals sound like "white noise" instead of a clear tone - more
work to do)

Found one broken slug this morning.

http://i180.photobucket.com/albums/x257/fish1_07/R-390/broken_R390_slug_zps1fed091a.jpg

Am I correct that the R-390 slugs are not interchangeable within the R-390
and not at all with the R-390A?
Probably not with the R-392 either?

Should I be able to find any kind of color codes or identification bands
under all the dirt?
In my R-392, as it is sealed up, the color codes on the slugs are easy to
see.

I don't see anything in TM 11 5820 357 35 to show how to tell the slugs
apart.


I'll try to glue it, and if necessary, proceed on a treasure hunt through
the piles,
as I know there is a spare R-390 RF deck around here somewhere....
73
Frank
KJ4OLL