Old original Dayton PT2 question-separate enclosure required???

[Dwight]

I finally got around to building line arrays using the old original PT2 planar tweeters that I bought about five years ago, yes I am a procrastinator. I noticed that all the screws holding them together were very loose so I tightened them and locked them in place with nail polish. Now, after assembly I am wondering if there is any danger of pressure from the woofers getting into the diaphragm chamber and doing damage. Is this a concern or am I just being paranoid?

[Wolf]

I finally got around to building line arrays using the old original PT2 planar tweeters that I bought about five years ago, yes I am a procrastinator. I noticed that all the screws holding them together were very loose so I tightened them and locked them in place with nail polish. Now, after assembly I am wondering if there is any danger of pressure from the woofers getting into the diaphragm chamber and doing damage. Is this a concern or am I just being paranoid?

Actually, yes. You do need to chamber those planars. They are open to the sides, and that is a possibility.

The depth of the chamber needs to be about 7/8" to clear all the screws, but a panel over the rear will suffice. It's also hard to get terminals on the original issued units, as they were towards the end instead of the other direction. I used a copper shaft with a loop on the end for a spring-contact type, and it worked well.

http://i18.photobucket.com/albums/b117/wolf_teeth_speaker/2i/100_3736.jpg

http://i18.photobucket.com/albums/b117/wolf_teeth_speaker/2i/100_3735.jpg

The fact that they were a little loose *could* have been intended. I had a pair that I tightened the screws on, same as yours, and when I went to use them a couple years later, same as yours, they were dead and unusable. I also had them stored face-to-face in the same box which could have magnetically nuked something, since they do not ship 2/box.

There is some missing information for me to be definite on this point, so I cannot say that is *the* reason mine died an early death. IMO, it shouldn't have made a difference due to the construction (since I've now dismantled one or 2), so it's up to you how you go on from here. I wouldn't worry about it personally, unless they start to flake out on you.

http://i18.photobucket.com/albums/b117/wolf_teeth_speaker/2i/100_3729.jpg

Now- if you *do* have to dismantle and resolder the contacts, I will advise you to *NOT* remove the screws completely from the chassis. They will swing and separate at the first chance available, severring the leads if they were intact. It's a little harder to access the terminals when still connected, but doable.

BTW, the PT2A and YAG-20 from Silver Flute are the same unit should you need replacements.
Hope this helps,
Wolf