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I promise the tables will still be there after you finish reading.
Also, another thing I’ve never seen before is a what appears to be a shipping tag of some sort (see photo).These are marked with EIA code “831” and are most prevalent during the 1966-68 time period.Some examples include a '66 Princeton Reverb and ’66 Pro Reverb with Better Coil output transformer, a ‘66 Deluxe Reverb and ‘67 Twin Reverb with Better Coil reverb transformer, and a 1968 Vibro Champ with Better Coil trannies.Since the new owner would have likely removed this tag immediately upon arriving home, I’m amazed that the one in the photo has remained intact since mid-1968!Along with dating amps by serial numbers, we were interested in determining production totals, if possible.I remember two 'suits' from upstairs standing behind me occasionally doing time studies.
They actually held clipboards and stopwatches to measure how long it took for me to attach various parts.These are marked with EIA code “606” which is the company number for Schumacher.Well, this universal “truth” was debunked when we found a bunch of amps with transformers made by the Better Coil and Transformers company.Of course I tended to hurry more when they were there, and I would fumble more, too.” Another really interesting fact was that he recalled that the eyelet boards were loaded/wired/soldered in Mexico!“I remember the circuit boards were pre-made, from Mexico, easy to screw into the chassis. When we had filled our cart we'd wheel it over to the Chicano chicks.A 1957 tweed Vibrolux was reported with a tube chart printed with circuit “5E3” (tweed Deluxe) instead of the correct 5F11 (see photo).