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| Tube | Plate Load |
| SV811-3 | 4.5k to 12k ohms |
| SV811-10 | 5k to 12k |
| SV572-3 | 4k to 12k |
| SV572-10 | 5k to 12k |
| SV572-30 | 6k to 20k (negative feedback recommended) |
| SV572-160 | 6k to 30k (negative feedback recommended) |
| Model | Plate Load | Best Application |
| Audio Electronic Supply OPT-126 | 8k ohms | one -3, -10 or SV572-30 |
| Audio Electronic Supply OPT-127 | 12k ohms | one -3, -10 , -30 or SV572-160 |
| Audio Note 5KPSE 75W | 5k ohms | one -3 or -10 |
| Audio Note 10KSE 30W | 10k ohms | one -3, -10 or SV572-30 |
| Audio Note 10KSE 50W | 10k ohms | one -3, -10 or SV572-30 |
| Bartolucci 7.8K 15W | 7.8k ohms | one -3, -10 or SV572-30 |
| Bartolucci 10K 30W | 10k ohms | one -3, -10 or SV572-30 |
| Electra-Print E18B | 6.2k ohms | one -3 or -10 |
| Electra-Print E48B | 1.8k ohms | three or four -3 in parallel |
| Electra-Print MT5KB | 5k ohms | one -3 or -10 |
| Electra-Print MT6KB | 6k ohms | one -3, -10 or SV572-30 |
| Electra-Print FT4KB | 4k ohms | one SV572-3 |
| Hammond 1628SE | 5k ohms | one -3 or -10 |
| Hammond 1629SE | 6.5k ohms | one -3, -10 or SV572-30 |
| Hammond 1640S | 1.25K ohms | three or four -3 in parallel |
| One Electron UBT-2 | 4.8k ohms | one -3 or -10 |
| One Electron UBT-1 | 1650 ohms | three -3 in parallel |
| Tango FW-150-10SR | 10k ohms | one -3, -10 or SV572-30 |