You may want to try a 9:1 ratio on a voltage divider using something like 900k and 100k so the current supply is 10 times the scope's loading of 1 meg maybe.....of course I wonder if that will load down the HV supply and drop the actual voltage reading anyways. If you could wait I'd suggest a 100:1 scope probe, but that's going to take a week to get it. Damon Brunger Telrad Electronics Fort Wayne IN ----- Original Message ----- From: "Bil Green" <tv.vcrrepair@xxxxxxxxxxx> To: ".TECHASSIST @ freelists . org" <techassist@xxxxxxxxxxxxx> Sent: Wednesday, March 16, 2005 9:39 PM Subject: [TechAssist] Trouble with 10x Probe > I am trying to find just what's needed to build a 10x adapter for a > scope probe. > > I need to measure up to 2kV AC PP and it's hard to find one that high > (and I need it right anyway). I will be checking a 5kHz AC voltage. > > My scope has a 1M input impedance, so adding 9M in series should do > the trick. But that doesn't work! The voltage reading is far less > than 10% measuring 250V PP horizontal signals (TV analyst). I tried > a carbon composition and carbon film resistor. > > Same problem using it with my PP voltmeter (designed for testing TVs, > and also has a 1M input impedance). > > The 10x probe for my scope went bad (reads way too low when set for > 10x). I was using it to measure an AC voltage which was over 2,000V > PP and didn't know that the probe was only rated at 600V. > > Bil > > PC 1000 > Mammoth Lakes, CA > 760-924-1000 > M-Pulse 5000 magnetic pulse generator > > -------------------------------------------------------------------------- --- > This Email List is Public. Remove: http://www.tech-assist.org/remove.htm > Lost Password: http://www.tech-assist.org and select "Login Problems?". > Email Archives: //www.freelists.org/archives/techassist/ > > > > -- > Internal Virus Database is out-of-date. > Checked by AVG Anti-Virus. > Version: 7.0.298 / Virus Database: 266.4.0 - Release Date: 2/22/2005 > > ----------------------------------------------------------------------------- This Email List is Public. Remove: http://www.tech-assist.org/remove.htm Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/