INVEST
13 models recorded, with the line-output transformer or tripler each was fitted with.
| Model | Parts |
|---|---|
| 12 HP 51 T | HR 42098 |
| 1451 CLR | HR 7972 |
| 772 M | HR 46121 HR 46221 |
| BZ 772 | HR 46221 |
| CM 1438 P | HR 46107 |
| CM 1438 T | HR 46088 |
| DK 4 M 1448 | HR 46186 |
| M 1448 P | HR 46186 HR 46201 |
| M 1454 D | HR 46186 |
| M 1554 D | HR 46186 HR 7933 |
| M 1568 E | HR 46222 |
| M 1568 P | HR 46222 |
| MONITOR | HR 42098 HR 46088 HR 46107 HR 46121 HR 46186 HR 46201 HR 7933 HR 7972 |