Looking for design consultation MCI-JH24

[nickb]

Here's some measurements:

Stock (unmodified ) bias erase card:

T2 pin2 -5.2 vdc
Q13-14 Gate -17.6 vdc
" " Drain -5.12 vdc 30v p-p
" " Source -15.4 vdc
Erase output 38v rms

Modified card=Using pin 6 instead of 5 on T2 and R41 to 100 ohms.

Same test points:

-5.04 vdc
-16.24 vdc
-5.16 vdc 25v p-p
-14.3
Erase output 50v rms

I changed R36 and R39 both more and less from the 2K stock resistor. No real difference in erase output.

Based on what I think the supplies are to this that doesn't seem to be self consistent. I suggest we do this via email else this will take a very long time. I'll send you one now. I'll post back her once we've got this figured out.