ISSUES WITH THE CONTACT PARTS I ORIGINALLY SELECTED
The gold plated contacts I used for my double wide SLT card (a controller card for the 1627 Plotter) are wider than the IBM original parts. They make it hard to install them without shorting and there is some mechanical interference with the nylon covers unless they are just perfect.
I ordered a number of narrower contacts in order to satisfy myself that they will still provide good connectivity when the card is plugged into an SLT board slot, and that they accept the covers easily. I found one I really liked and conducted tests to ensure a good connection when plugged into a card slot.
NEW REVISION OF PCB TO ALIGN THESE CONTACTS IDEALLY
Using the mechanical drawings of the contacts, the 3D design of the nylon covers and the dimensions of original IBM boards, I came up with a pad design and placement that should allow for an easier construction without the risk of skewing that occurred with the prior contacts.
The boards are being produced and a batch of fifty contacts are on their way as well. I hope to have the card connectors dialed in to my satisfaction once they arrive and are put together. When that is ready, I can mount all the parts for the 5806223 replacement card I am building to attach a plotter to my 1130.
No comments:
Post a Comment