I just had a friend buy this for me (I don't have an ebay account). I hope I didn't make a mistake.
http://www.ebay.com/itm/Electronic-Development-Corporation-EDC-VS330-VOLTAGE-STANDARD-/161069656213?nma=true&si=PiGtcBMSdSOxgbm9DhiZ6iLo1GQ%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557 Of course, once I have it, it's the chicken and egg problem. The best I have to check it against is an HP 3478A that was last calibrated an unknown number of years ago. It has a little round sticker over the CAL switch on the front, but no dated calibration label that I can see. It came from a repair facility that closed a few years ago. Actually, the reason I was tempted to buy the VS330 was because I think the 3478A is off a bit. A while back, I built a simple 5V reference with a MAX6350. The 3478A read high. I took the reference to work and the best Fluke handheld we have was dead on (I don't remember the model right now). I made the measurement again last night and the 3478A reads 5.0026 V, with the last digit fluctuating. Room temperature was 26 C. I guess obsessing about these things has brought me here to the Volt Nuts. I have been on Time Nuts for several years. Joe Gray W5JG _______________________________________________ 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.
