perhaps like the one in this auction for a Wurlitzer?
On 3/18/2013 1:36 PM, Richard wrote:
OK, I've got an HP X-Y display with the older
power cord connector,
where the three pins are round instead of two being blades and the
only the ground pin being round. The entire plug socket is also
rounded instead of angled.
I've tried to find a relevant picture on the interwebs, but you try
googling "power coord connector" sometime and see if you can find the
older oddball you're looking for...
Hopefully my description alone is enough to aid someone in identifying
the exact standard/specification for this kind of connector.
I'm looking for cords that fit the connector. I will try to remember
to take a picture with my phone on Wednesday when I am down at the
museum, if we can't figure it out by then.