If you are operating from 12V supply rails, then a value of 2K for R63 – R70 and 2K for
R71 – R78 will produce 5V levels. This will provide a 1K output impedance.
For 12V operation, a value of 1K for R63 – R70 and eliminating (not installing) R71 –
R78 will produce 10V level signals with an output impedance of 1K.
But, again, we found that the standard interchangeable values of 1K5 and 3K provided
the adequate level of gates and triggers to interface with our other equipment.
Now, after all that, go ahead and install your gate bus resistors. Install all eight of the
resistors R63 – R70, then install all eight of the resistors R71 – R78.
After installing the gate bus resistors, install the rest of the resistors. Perhaps the best
method is to gather all of the 100K resistors and install those, then the 22K resistors, and
so forth. Remember, if you’ve got 100K 0.1% resistors for your Analogue Board, don’t
install them on this board! This board ain’t so picky, and it would be an entire waste to
do so.
Gate Bus Resistors (Group 1) Selected Value
Quantity Designators Tol Done
8 R63 – R70 5%, 1/4W
Gate Bus Resistors (Group 2) Selected Value
Quantity Designators Tol Done
8 R71 – R78 5%, 1/4W
22K Resistors
Quantity Designators Tol Done
25 R1 – R22, R50 – R51, R80 5%, 1/4W
15K Resistors
Quantity Designators Tol Done
2 R29, R79 1%, 1/4W
100K Resistors
Quantity Designators Tol Done
24 R23 – R26, R30, R49, R52 – R62, R81 – R84, R89,
R90, R94
1%, 1/4W
1M5 Resistors
Quantity Designators Tol Done
2 R92, R93 5%, 1/4W
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