GR-300 Interconnection Wiring

I soldered wires from a 25-pair telephone cable onto the GR-300's main board and performed a few trace cuts to allow some signals to run off the board and back after external processing. The wires were connected to a DB-50 connector which I mounted inside the GR-300.

Here's the bottom of GR-300's main board showing the added wires:

Here's what it looks like when mounted in the GR-300's chassis with the DB-50 connector (right) attached to spacers. The DB-50 on the left is not yet in use.

       A A  
       | | 
       | +----- DB-50 connector shown above. 
       +------- Not yet in use.

List of Connections

+------+---------+------------------+-----------++------+---------+------------------+-----------+
|      | 25-pair |                  |           ||      | 25-pair |                  |           |
| DB50 | wire    |                  | GR-300    || DB50 | wire    |                  | GR-300    |
| Pin  | color   | Description      | Location  || Pin  | color   | Description      | Location  |
+------+---------+------------------+-----------++------+---------+------------------+-----------+
|   1  | Wht/Blu | Str 1 Hex Signal | A2-7      ||  26  | Grn/Blk | Str 4 VCO Saw    | 4-IC7-7   |
|   2  | Blu/Wht | Str 2 Hex Signal | A2-8      ||  27  | Blk/Brn | Str 4 Per CV Out | 4-IC5-1   |
|   3  | Wht/Org | Str 3 Hex Signal | A2-9      ||  28  | Brn/Blk | Str 4 Per CV In  | 4-IC6-3   |
|   4  | Org/Wht | Str 4 Hex Signal | A2-10     ||  29  | Blk/Gry | Str 4 Env Out    | 4-IC2-1   |
|   5  | Wht/Grn | Str 5 Hex Signal | A2-11     ||  30  | Gry/Blk | Str 4 Env In     | 4-R55/R60 |
|   6  | Grn/Wht | Str 6 Hex Signal | A2-12     ||  31  | Yel/Blu | Str 5 Fund Saw   | 5-IC5-1   |
|   7  | Wht/Brn | Str 1 Fund Saw   | 1-IC5-1   ||  32  | Blu/Yel | Str 5 VCO Saw    | 5-IC7-1   |
|   8  | Brn/Wht | Str 1 VCO Saw    | 1-IC7-1   ||  33  | Yel/Org | Str 5 Per CV Out | 5-IC5-7   |
|   9  | Wht/Gry | Str 1 Per CV Out | 1-IC5-7   ||  34  | Org/Yel | Str 5 Per CV In  | 5-IC6-5   |
|  10  | Gry/Wht | Str 1 Per CV In  | 1-IC6-5   ||  35  | Yel/Grn | Str 5 Env Out    | 5-IC2-1   |
|  11  | Red/Blu | Str 1 Env Out    | 1-IC2-1   ||  36  | Grn/Yel | Str 5 Env In     | 5-R55/R60 |
|  12  | Blu/Red | Str 1 Env In     | 1-R55/R60 ||  37  | Yel/Brn | Str 6 Fund Saw   | 6-IC5-7   |
|  13  | Red/Org | Str 2 Fund Saw   | 2-IC5-7   ||  38  | Brn/Yel | Str 6 VCO Saw    | 6-IC7-7   |
|  14  | Org/Red | Str 2 VCO Saw    | 2-IC7-7   ||  39  | Yel/Gry | Str 6 Per CV Out | 6-IC5-1   |
|  15  | Red/Grn | Str 2 Per CV Out | 2-IC5-1   ||  40  | Gry/Yel | Str 6 Per CV In  | 6-IC6-3   |
|  16  | Grn/Red | Str 2 Per CV In  | 2-IC6-3   ||  41  | Pur/Blu | Str 6 Env Out    | 6-IC2-1   |
|  17  | Red/Brn | Str 2 Env Out    | 2-IC2-1   ||  42  | Blu/Pur | Str 6 Env In     | 6-R55/R60 |
|  18  | Brn/Red | Str 2 Env In     | 2-R55/R60 ||  43  | Pur/Org | Str 1 Mix Out    |           |
|  19  | Red/Gry | Str 3 Fund Saw   | 3-IC5-1   ||  44  | Org/Pur | Str 2 Mix Out    |           |
|  20  | Gry/Red | Str 3 VCO Saw    | 3-IC7-1   ||  45  | Pur/Grn | Str 3 Mix Out    |           |
|  21  | Blk/Blu | Str 3 Per CV Out | 3-IC5-7   ||  46  | Grn/Pur | Str 4 Mix Out    |           |
|  22  | Blu/Blk | Str 3 Per CV In  | 3-IC6-5   ||  47  | Pur/Brn | Str 5 Mix Out    |           |
|  23  | Blk/Org | Str 3 Env Out    | 3-IC2-1   ||  48  | Brn/Pur | Str 6 Mix Out    |           |
|  24  | Org/Blk | Str 3 Env In     | 3-R55/R60 ||  49  | Pur/Gry | Mast Sum Pnt In  | IC9-2     |
|  25  | Blk/Grn | Str 4 Fund Saw   | 4-IC5-7   ||  50  | Gry/Pur |                  |           |
+------+---------+------------------+-----------++------+---------+------------------+-----------+