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The Track 2 problem is most worrisome, but in general you don't know what you have unless you know what trimmers they twiddled and other specifics about the "repair". I'd be very unhappy about those results. Track 2 could be totally out of adjustment, may be unplugged, plugged backwards, shorted out, broken head wires, etc., and no one's really to know except your original tech. For the record, there should have been no "unplugging" of connectors for a calibration, but you don't know in this case.
I've calibrated a couple 246's and a 244 since posting on this thread last. There are a specific number of steps to calibration that must be followed, and a standard calibration tape is a must for setting proper levels.
A -2 or -3db dropoff would be typical for this aged unit. Dbx will change the levels slightly. Calibrations are done with the dbx "off", then deal with the dbx adjustments after the signal chain is adjusted without dbx. As GFM said before, Tascam recommends not messing with the dbx adjustments unless absolutely necessary. I've been told that by a veteran Tascam tech, too. However, your case may require going through these adjustments.
You're shooting a little bit in the dark unless you know what the other tech did. However, a proper calibration follows a set number of steps. A service manual, cal tape & some techy
workbench tools are required.
This puts you in a very difficult situation, both with payment to the tech and rectifying the problems. Is it possible to pick the brains of your tech to find out what he did? Your best recourse may be to ship it to Tascam at this point. They will fix it right the first time.


