Those are not holes... they are polarity markers on the silkscreen for the connectors. I do have one concern about doing the extender with ribbon cable. It is rated for 300V and three of the card slots do have 300V on them.

Would that be at the maximum temperature? Service would be at room temp. Sounds like a good excuse, right? ----- Original Message ----- From: "Mark Sims" <holrum@hotmail.com> To: <volt-nuts@febo.com> Sent: Friday, August 29, 2014 2:28 PM Subject: [volt-nuts] Fluke 5200A extender board. > Those are not holes... they are polarity markers on the silkscreen for > the connectors. > I do have one concern about doing the extender with ribbon cable. It is > rated for 300V and three of the card slots do have 300V on them. > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there.

I see discussions of late on the Fluke 5200A. 'Appears it is widely used and available. I have been fortunate to amass four of the HP 745A AC calibrators; I thought I was getting a pretty good setup for establishing AC references. What is the opinion of the group of the HP 745A? Other than heavy, hot and loud. :-) Once calibrated, both units appear close in accuracy specs. Does the 20 years between them really matter if they are set up properly? Don KG5CID