Rectifier Install and Generator Output

[9n200460]

I just installed a full wave bridge rectifier on my 6 Volt Pos ground 9N. I hooked the negative terminal to the generator and one of the AC terminals to the battery as described on earlier posts (thanks!) I am getting a reasonable charge rate measured at the battery. I then checked the generator output by having the red prove on battery ground and then touching the black probe on my digital multimeter to the one wire 3 brush generator output. At idle i get 10-11 volts and up to 20 volts at higher RPMs. I was expecting something more like 7-8 volts max, although I have to admit that I didn't check it with the original cut out. Suggestions?
 

[JMOR]

[9n200460]

I will see if I can borrow an analog one or maybe pick one up. If I am seeing the voltage at the battery increase from 5.7 to 6.7 or so with the engine running, is it likely that there is anything wrong generator wise?
 

[JMOR]

[souNdguy]

slow sample rate on cheap consumer meter.

go analog like jmor said.