| SD2 |
Load Capacity, 20 Watts (Separate Wound) |
| SD4 |
Load Capacity, 40 Watts (Auto Wound) |
| SD6 |
Load Capacity, 60 Watts (Auto Wound) |
| SD10 |
Load Capacity, 100 Watts (Auto Wound) |
| SD15 |
Load Capacity, 150 Watts (Auto Wound) |
| SD20 |
Load Capacity, 200 Watts (Auto Wound) |
| SD25 |
Load Capacity, 250 Watts (Auto Wound) |
| SD1A |
Load Capacity, 10 Watts |
| SD2A |
Load Capacity, 20 Watts |
| SD4M |
Load Capacity, 40 Watts |
| SD6M |
Load Capacity, 60 Watts |
| SD10M |
Load Capacity, 100 Watts |
| SD15M |
Load Capacity, 150 Watts |
| SD20M |
Load Capacity, 200 Watts |
| SD25M |
Load Capacity, 250 Watts |
| SD40M |
Load Capacity, 400 Watts |
| SD50M |
Load Capacity, 500 Watts |
| SD75M |
Load Capacity, 750 Watts |
| SD100M |
Load Capacity, 1000 Watts |
| SD150M |
Load Capacity, 1500 Watts |
| SD200M |
Load Capacity, 2000 Watts |