I've got 2 bridge rectifiers that I've tested from each AC pole to each DC pole and verified conductivity in one direction, open in reverse direction. Forward voltage reading for rectifier#1 is around 0.420v, #2 is around 0.450v. This would lead me to believe both are ok. I also tested between the DC terminals + and - and verified conductivity in one direction. however here's where it differs. As I understand it the test is passing through two diodes when reading across the DC terminals. Forward voltage reading was around 0.840v on rectifier #1, but stayed around 450 on rectifier #2. I can't seem to find anywhere that tells me if this forward voltage value should be doubled (#1) or not (#2) ? Or are they both ok ?