I am the owner of a few fairly accurate and/or precise voltmeters and would like some information if it's available.
First, my Electro Instruments model 3000 5-digit antique with Nixie tube readout, and the accessory AC converter. It hasn't been calibrated in decades but seems pretty close. I have no manual. Second is the recently acquired, not working HP 3456A. Struggling with that repair. Third is the Valhalla 4440. I have most of a manual but it differs somewhat from mine. Mine has an issue on one range of volts. Fourth is the Racal-Dana 4200. This works fine but after it warms up for a half hour starts to get erratic. Fifth is a Calibration Standards model DC-110A. No manual. It has some trouble on range overlap. Can anyone help me with any of these units? Documentation, reputation, etc. Photographs supplied if needed. Bob _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
