Attendees: Bill Newman, Bill Flora, Bob Erickson, Douglas Martin, Robert Garner, Frank King, George Ahearn, Glenn Lea, Joe Preston, Ron Williams, Stan Paddock
Bill Newman has been given permission to look at some "Transmitting" typewriters in the warehouse in Milpitas. From inventory pictures these have data cables attached. The machine we have does not have same.
The picture above is for one section of the type bars. Thanks to Ron Crane for the high quality picture.
Joe is continuing his work on the third 729 attached to the German IBM 1401 system.
Ron Crane came in and helped up with our documentation of the power used in the IBM 1401 Restoration Room. Ron explained the difference with three phase delta connection and three phase Y connection. Ron explained the functionality of the power converter. Input 208 volts three phase delta 60 cycles per second with the output three phase Y 308 Volts 50 cycles per second. We also determined the power converter is only 56% efficient.
If you are interested in the data, you can find it on my web site at: http://www.paddockdrayage.com/OneAtATime/CHM1401RoomPower.xls
Robert Garner spent time verifying that the work we are performing on our systems is within the scope of what IBM did back in the 1960's. Since he works for IBM, this seems like a reasonable thing to do.
Bill Flora checks out the card reader of the Connecticut IBM 1401 system. This machine has given us problems from the day we first powered it up.
We have identified and fixed several problems and fixed them. We are hoping that we have fixed the last problem.
Ron Williams is checking for:
1. That the fans are operational.
2. That he has chased the last varmint from the machine.
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