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|After hours, Robert Feretich showed Ed Thelen the fancy Tektronix 2230 'scope and watched strange pulses coming out of the differential amplifier connected to the 1403 chain timing pickup. The chain sync is generated by two half length pulses - but there was other trash happening about 33 pulses from the sync pair. Probably best to wait for a 1403 expert (Saturday?) The trash caused pulses like this in the counting circuits - and the printer sync checks?|
|Bob Erickson is preparing to thread the 026 ribbon through the threading slot. The game is to get the eyelet (white arrow) through the slot (red arrow) - no big deal, but ya gotta do it.|
|Ron Williams designed and constructed this printer ribbon re-inker. His current recipe is 2 parts mineral spirits, one part 30 weight motor oil. The little ratchet assembly to help control the ribbon during re-inking is concealed beneath Ron's hand. Ron has retained the legal firm of Bluffem, Fakem, Nukem & Shaftsall to represent his intellectual property rights ;-))|
|I asked Ron Williams what he fixed (by card replacement - bad transistor) to make the adder work again. This is what he wrote. Do you have any clue about the meaning of this - I understand each individual word - but he might as well be talking IRS tax code.|
|Life is real "interesting" for Allen Palmer and Grant Saviers. Not only do they have to re-manufacture the clutches for the tape reel movement - they have to re-invent the techniques to get them assembled and adjusted correctly. When re-assembled the first time - with lots of hope - a grinding noise soon started. Something had shifted along the central shaft !!|
| Here is Grant's message -
||And here is the 729 with out its clutches - again -. The wooden bar across the
top is to help support the clutches and shaft during removal and insertion.
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Frank & Bill replaced (soldered in) an open fuse to a printer driver card.
The fuse in the other defective card seems OK.
We got extra printer driver cards from the 1401 in Visible Storage - they were a different part number on
the same part number card - a wire on one version was replaced by a resistor in the other version - they
This is the back side of the printer hammer assembly. The black air hose is from a fan
used to cool the parts and blow paper dust out of the area.
The German 1403 did not have "support rails" - so we got the rails from the unit in Visible Storage and
removed the printer hammer assembly. This helps support the heavy assembly during rather delacate operations.
This image is very confusing - you are looking at the BACK of the paper from the hammer side.
This side is normally white - but got printed and reversed to save paper. - Sorry -
So, you see the Hammer Assembly on the left, supported by the rails. The paper tractors on each side of the paper,
and the hammer view of the paper to be printed - the ink is deposited on THE OTHER side of the paper.
Frank King is holding a tool which has a central shaft with an excentric head. It is used to adjust print hammers.
This is one of the re-re-built clutch assemblies. The two sets of belts are go in
opposite directions. The arrows indicate the mechanism used to slowly lower the tape into the
columns and also to slowly raise the tape out of the columns.
Bob Erickson has been struggling with the 077 for some months. Bill Flora seems
to acknowledge that he knows what struggle is. (Bill has been working on the 1402 card reader/punch.)
Bob Erickson is talking with Megan Masters, one of Allen Palmer's extended family.
Bob Erickson is talking with Megan Masters about one of the comparitors in the 077.
Bob Erickson is showing Megan Masters, one of the 077's electromechanical
numeric comparitors. This can compare 8 digits (say a customer number) in one card
with 8 digits in another card. (The game plan is to combine sorted customer information cards
(say containing name and address for sending bills) with sorted customer detail cards
(say purchases or electric usage). (State of the art 60 years ago!! )
go to 2006 January