Hi, (btw, we use our real names here on this forum, please read "Forum Rules")
The 34 came in several configurations. The 34-2B is a 1/2 track machine so it won't play 1/4 track tapes.
You might wish to check out the "Beginner's Guide" located in a sticky above this forum. Toward the end (IIRC on the third page) there's a good post regarding track formats on tapes and heads.