BeePre_Voltage _readings

[Johnboy]

Hi to all in the know,
having problems with the B channel.
11) 215v
12) -5V
13) 0V
14) 0V
15) 190V
16) 0.875V
17 183V
18) 0V
19) 225V
20) 226V
27) 0V
28) -6mV
29 -5.9mV
30) -5,9V
31) 1,88V
32) 0V
39) 0V
40) 225V
41) -1,3mV
42) -1,3mV
43) 222V decreasing when warming up!
44) 0V
B2) 190V decreasing when warming up!
D3) 1,88V
D9) 218V

 

[Paul Birkeland]

12) -5V

Are you sure that isn't a millivolt reading?  That terminal is grounded through the 475K resistor between 12 and 13.  Is it there and well connected?

16) 0.875V

This tells me that your 300B isn't getting heated.

19) 225V

This makes me think that the 300B isn't properly inserted in the sockets.  There are two fatter pins, and they need to go in the fatter socket holes.  I think you're 90 degrees off.

Check the tube orientation, all of this may clear up if that's the issue.