On 4/26/2017 9:47 AM, Al Kossow via cctalk wrote:
On 4/26/17 8:06 AM, jim stephens via cctalk wrote:
Stu Phillips, a friend of ours did the insertion of metal metal Southco
extractor handles on our boards for the
Microdata 1600. He probably had a machine, as the Southco levers were riveted
onto our board thru holes in the corner
and levered the board in and out of the card cage.
This shows the Southco extractor. The Nova DG cards I have have them as
well.
http://bitsavers.trailing-edge.com/pdf/microdata/1600/PCB_Photos/A20001043_Data_Bot.jpg
Data General Nova 3 cpu card showing the same extractor.
https://4.bp.blogspot.com/-zSDB_FtBUZc/WC6t5e2XkYI/AAAAAAAEF8Q/f4aH_E65ypsn8BqmpXFv75xeTXuGFaRhQCLcB/s1600/2016-11-17%2B22.29.12.jpg
If the above link is fubar, the posting is here in this blog post:
http://jimsoldtoys.blogspot.com/2016/11/data-general-nova-3.html
The fastners were rivited thru the board, and with particularly stiff
backplanes, the corner of the boards could also
break off as well as the bowing of the boards Al refers to. The boards
bend up or down in the center of the card
as you pull very hard on each edge. Eventually either your fingers
bleed, or the card pops out of the connector
at the far end.
I think these are the same style used on the DG Nova and the Alto. They have a
problem that they bend if you aren't
paying attention to card alignment.
Also came upon this
http://www.aboveboardelectronics.com/bivar/pdf/page26.pdf
modern source for DEC style plastic handles?
