PCB design / layout comments (mark when finished)

Preamp

• Schematic incomplete

LV Mixer

• Small changes per lab meeting
• Perform PCB layout

HV Pulser

• Remove the LMG1210 and all associated passive components. Replace with circuit below.

• Increase silkscreen text height to 0.05 or 0.06
• Add mounting holes
  • put on 0.25 inch grid
  • 0.25 inch dia pad, 0.15 inch diam hole

Filament supply

• Ground the coax shields on the schematic
• Add a 10k resistor between the + and - output connectors
• Please add a connector for remote monitoring of voltage/current.

I suggest a DB-9 female connector mounted on the PCB edge with pinout as follows (so a twisted pair cable can be used):

1 - output+ (J4 center) (through 100 ohm resistor)
2 - output- (J3 center) (through 100 ohm resistor)
3 - -VDC (through 100 ohm resistor)
4 - P2 (pot wiper) (through 100 ohm resistor)
5-9 - GND

• Choose a panel meter (2-1/2 or 3-1/2 digits is fine) and figure out

how to power it and add appropriate pins to J5

• Fix the mounting holes:
  • put on 0.25 inch grid
  • 0.25 inch dia pad, 0.15 inch diam hole

• All silkscreen text is too small and mostly too close to components
  • On a large, non-crowded board like this, use ~ 0.08 inch (please set to inch settings) height text and move a bit away from components to easier to read.