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----- Original Message ----- From: pdxoregonpete To: TekScopes@yahoogroups.com Sent: Wednesday, August 15, 2007 11:55 AM Subject: [TekScopes] Tek serial numbers Was: 7704A/P7001 Just a FYI on Tek s/n's For those groups (later divisions) that followed the rules and there were exceptions the first producion unit would be B010101. B was for Beaverton (*) 01 the initial design revision and 0101 the first unit. Sometimes when a design revision was done the sequence number was reset, for example B041234 then B050001 (or maybe B050101 that I cant remember) Sometimes you will see instruments on Ebay that have a single letter then two digits. These were engineering s/n's. Ann - A Phase - "any thing can change" Bnn - B Phase - "major design changes done", very close to production at times customers would be 'lent' B phase instruments then in most cases production. now i wish I still had my copy of Deane's NPI manual Cnn - C Phase, and I also remember seeing AAnn on a one of a kind 7K plugin I use to own. (*) Dean or Stan - Was B initially for Beaverton and did I make any mistakes ? Hi Pete: That is a good explanation of the serial numbering system. B was for Beaverton but changed to include all of the US manufacturing sites, but the Redmond group rebelled and used R instead. The international customs people wanted a way of knowing where things were manufactured so other letters were used and SonyTek used 300000 without a letter. Deane