| Manufacturer | Part Number | Description |
|---|---|---|
| SL1640C | (SL1640C / SL1641C) Double Balanced modulators | |
| SL1641C | (SL1640C / SL1641C) Double Balanced modulators | |
| Unknown Manufacturer | SL1640 | THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NEW DESIGNS |