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Pull tab removal on TM500 series plug-ins


 

Hello, first time posting here. I was recommended here by a few people from the EEVblog.

Anyway, here's my problem. I want to remove the metal face plate on my Tek FG501, but the pull tab stands in the way. My FG501 is a pretty early serial number and thus uses the old pull tab mechanism, where it's just a piece of bending plastic. I know the newer versions use one that is a bit similar to the one used in 7000 series plug-ins, but mine are not so.

So my question is, how do I remove the pull tab on my FG501? Preferably in a non-destructive manner.

Thanks.


 

If it is the two piece tab, the inner end of the pull tab part fits into a pocket in the internal (black) part.
A small screwdriver and needle nose pliers can be used to force it put of the pocket.
This can put a lot of stress on the plastic and it is weakest at this location, but I have done it successfully many times.
I would not recommend doing it to the same tab more than a few times.

ed


 

I think Ed is describing a newer version of the locking mechanism than the one that Mr. Blown is dealing with. The older one is gray. It is held in place by a small gray plastic rod that expands the end of the pull tab. In my opinion this design was not intended to be disassembled, but rather replaced.

I am interested to hear if anybody has reused this style. It is my practice to replace that latch with the version Ed mentioned.

I have one on the bench now. After breaking off the tab I sliced it open to see how it was made. I can provide pictures. But, the plastic is hard and brittle. Even if you drill out the plastic rod you might not be successful at getting the pull knob off.


 

Here is a link to some photos of the older latch.

/g/TekScopes/album?id=292949