15 May
2023
15 May
'23
10:36 a.m.
On 4/22/2023 6:14 PM, Jay Jaeger wrote:
> I have an HP 2875B paper tape drive that I want to interface to. It has a 50 pin
block connector (using well under 1/2 the pins). The connector manufacturer was
Continental.
> I have already discovered, the hard way, that it is not a winchester connector - the
pins on the 50 pin Winchester connector I just obtained via ePay that otherwise fits are
too small in diameter and won't make contact. I *could* increase their diameter using
solder - but -- yuck.
> The other connectors of this sort I am familiar with that have the same general
overall size and pinout were made by AMP. Does any one know if the AMP connectors and the
Continental connectors would be compatible?
On 2023-May-13, at 6:54 PM, Jay Jaeger via cctalk wrote:
Will reply in answer myself on this one:
Firstly the paper tape reader is an HP 2748B - sorry about that typo (blush).
Secondly the AMP connector I acquired was NOT compatible with the Continental connector
on the paper tape reader. The pins on the AMP connector, while larger than those on the
Winchester connector, were still a shade too small to make a reliable connection - the
connector was clearly loose when mated.
Which brings up the question: does anyone have a spare cable or 50 pin male Continental
connector that I could purchase/trade for?
No spare connector, sorry.
If it's of any help though, on my 2748 connector (the cord-plug-in end) the male pin
diameter is 0.061 ~ 0.062" (measured with a cheap micrometer, perhaps the actual spec
is 1/16=0.0625).
I understand the confusion - I have on hand 3 different examples of ~0.062" dia. male
pins. Cursorily they look the same and plug into the same female pin, but are different in
length and in the shoulder-housing-insert area. Then there are similar-looking pins that
are ~0.040" diameter, which may be what you acquired.
These kind of look like they might be the 0.062 diameter:
https://www.ebay.com/itm/115573632341
whereas these look like they could be the 0.040 diameter:
https://www.ebay.com/itm/115573630849
But then you have to watch out to be getting the correct type of pin for the housing one
is using, for as stated above they can differ in that section of the pin even though of
the same mating diameter.