If you want it for AC, I'd suggest getting a Dekatran or equal. I woulkd expect them to have much lower output impedance.
I'm pretty sure I've seen ratio transformers available with 7 decades of switches, maybe more. Singer/Gertsch and ESI and maybe GR. I've not seen DC dividers that good. Best, -John ================= > I know someone who has a General Resistance Dial-a-vider DV-4107 that I > may > be able to trade for. It has input terminals marked "700 V Max" and seven > decade switches. It is also labeled "Input Resistance 100,000 Ohms". > > I Googled, but can't find any information at all on this. The closest that > I find is a Dekavider. This one is very similar to the Dial-a-vider, only > not as tall and with different knobs. > > http://www.ebay.com/itm/ESI-Dekavider-RV622A-6-Decade-Kelvin-Varley-Voltage-Divider-/171095439907 > > I took a peek inside the Dial-a-vider and it looks very high quality. The > resistors appear to be custom made. There is no percentage marked, but > each > one has a serial number. There are wire stubs, which I assume are somehow > used to trim things. On the back are pin jacks for each decade, which I > assume are used for calibration. > > I did a quick check by hooking it up to my VS330 DC reference and looking > at the output with my HP 3478A, which we know to be off a bit (I assume > that its relative readings should be OK). All but one of the decade > switches give me very accurate steps. > > The reason I'm interested in this is not so much for use with a DC > reference, as I already have the VS330. I was thinking about using it for > AC, if I can buy or make a reasonably accurate AC reference. > > Is anyone familiar with this particular model? Other comments? > > Joe Gray > W5JG > _______________________________________________ > 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. > > _______________________________________________ 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.
