Batboard

I pulled this hybrid out of a T3011CX (DES/DES-XL) KVL.

I can't find any info on this part number??!?

I know the TRN-7036A is the standard part # for the DES-XL hybrid.

My old books and even Google has nothing on it?

Anybody know some history here?

That is the early part number for the DES, DES-XL hybrid. I don't know why they changed part numbers or what the difference is, because I've used hybrids with that PN in four level DES and it worked fine. Perhaps some trivia buff can tell us more.