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Hi H?kan,
All of the instruments that I know of which have been modified have a Tek label that says something like "MOD WN". The MOD is always identified by two letters on every plugin that has a mod. I have never seen MODs listed by Tek part numbers.

In fact until now I didn't know there were part numbers for the MODs at all. Brian Henry put a copy of the Tek Modified Products list (June 1978) in the archives some years ago. It is at

/g/TekScopes/files/%28Modified%20Products%29.pdf


You can see from Brian's Modified Products list that there was almost no consistency in how MODs were numbered. I understood from talking to several people that the MODs were not well "controlled" by some centralized authority. As a result a lot of documentation relating to the MOS was lost. Your list with the standard part numbers suggests otherwise. Maybe there was a system after all and someone was responsible for issuing these part numbers (Deane Kidd?). Is there a way to cross reference a MOD identifier from Brian's document such as "MOD WN" to a 040-xxxx-xx number from your list? Your list gives very little information about what the MOD does compared to Brian's document.

Good luck getting your Microfiche copier repaired. Bummer that it broke!

Dennis Tillman W7PF