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I > IBM  > AN/FSQ-7


IBM
AN/FSQ-7

John Allen was the instructor supervisor of the computer maintenance officer school and had field maintenance experience in Michigan and Virginia:
The AN/FSQ-7 was maintained for many years by a staff of IBM technicians. In 196x the U S Air Force started to train military technicians to maintain this system. It normally was operated in the mode of one systed  providing for the air defense mission and the second unit being used to provide data processing, providing for the programming and program debugging, and on second shift being maintained. There were no technicians running around replacing tubes. The maintenance was done by operating maintenance programs which stressed the operating envelope of the vairious components and thereby prediced failures. A plug-in unit was then replaced and sent to a lab on the premises for analysis and if necessary repair.


Another responsible for maintenance on the Q7 disagrees with a paragraph of the summary:
The third paragraph says there were "several hudred tube failures each day, replaced by workers racing up and down the tube racks with shopping carts full of replacements."
This is NOT at all true.  I was in the Air Force and did maintenance on a Q-7 and it was NOTHING like that.  It was normally scheduled maintenance and we removed and replaced the pluggable units.  It was actually rare for the computer running the active program to fail.

About the built-in speaker, Doug Elliott specifies:
There was a volume controled speaker on the main maintenance panel, extreme upper left.  This was the only place sound was heard.  We would program Christmas music for it.  The reason the speaker was used was to monitor data being processed.
I don't know where the signal tied into but we so got used to hearing the pink noise laced with changing tones of boops and beeps that we didn't hear it. But when the sound just stopped, we noticed it. That's when the computer would freeze with no alarm.  So we just hurried and swicthed over to the other one.  Kinda exciting when they both went down.





 
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