Agree!!!
But I have seen the reading with Fluke tester; I think with this very low voltage just some cm of dsitance you read different value. Also for the ground routing and how long it is
Walter.
I replaced the coupling caps with the stock one...pls see the pictures
I replaced the 300B and used the Western for this measurement
No change at all...
The measured TP10 starts at 60mV and slowly constantly increases to more than 120mV as you can see on the pictures.
AC is 234V now here in my workshop (10V AC higher than two hours ago)
I only measured the right channel and unplugged the 300B from the left channel.
2: 2.8V (REF: 2.8V)
4: 57.6V (REF: 70V)
6: 65.4V (REF: 75V)
8: 215V (REF: 205V)
10: 0.0632 => 3min => 0.1068 => 3min => 0.1205
12: 64.5V (REF: 60V)
14: 69.5V (REF: 12 + 5V)
16: 388V (REF: 390V)
18: 396V (REF: 405V)
20: 312V (REF: 330V)
22: 415V (REF: 420V)
Due to the higher supply voltage of 234V AC, the supply related values are much closer to the reference values now.
However, the grid offset is still present and seems to increase overt time.
I replaced the 300B and used the Western for this measurement
No change at all...
The measured TP10 starts at 60mV and slowly constantly increases to more than 120mV as you can see on the pictures.
AC is 234V now here in my workshop (10V AC higher than two hours ago)
I only measured the right channel and unplugged the 300B from the left channel.
2: 2.8V (REF: 2.8V)
4: 57.6V (REF: 70V)
6: 65.4V (REF: 75V)
8: 215V (REF: 205V)
10: 0.0632 => 3min => 0.1068 => 3min => 0.1205
12: 64.5V (REF: 60V)
14: 69.5V (REF: 12 + 5V)
16: 388V (REF: 390V)
18: 396V (REF: 405V)
20: 312V (REF: 330V)
22: 415V (REF: 420V)
Due to the higher supply voltage of 234V AC, the supply related values are much closer to the reference values now.
However, the grid offset is still present and seems to increase overt time.
You're right. I have not noticed this.
However, here is a test certificate I've downloaded from a Western dealer.
It shows a comparable chart.