Re: AMPICO Problem
By John Grant
Terry, I hesitate to suggest something so obvious to one as technically knowledgable as yourself, BUT, have you checked to see that the 7T tracker bar tube is unobstructed? Does this (transition) action have the funny cancel pneumatic with the extended finger that opens the 7T and 7B tubes at the expression cutout when the AMPICO switch is "off". If so, what happens if you push the finger away from the cancel tubes while a roll is playing? If the (treble) intensities cancel then there is a good chance the cancel signal from the tracker bar is not making it that far, and the remedy will be obvious. If it still fails to cancel, remove the 7T tube at the expression unit itself. If still no cancel, you will simply have to demount the treble expression unit and analyize the operation of the 7T valve block. I'm voteing for a tube blockage somewhere along the way, however. Sheeshe! In 8-9 years haven't you used a tracker bar pump?!
<Large, toothy grin!> -John Grant
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(Message sent Fri 28 Jul 1995, 03:27:35 GMT, from time zone GMT-0400.) |
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