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| Part Number | 1650N | 1650NA |
| Manufacturer | Hammond Manufacturing | Hammond Manufacturing |
| Series | 1600 | A |
| Packaging | Bulk | Box |
| Product Status | Active | Active |
| Turns Ratio - Primary:Secondary | - | - |
| Impedance - Primary (Ohms) | 4.3kCT | 4.3kCT |
| Impedance - Secondary (Ohms) | 4, 8, 16 | 4, 8, 16 |
| DC Resistance (DCR) - Primary | 82.5Ohm | 37.19Ohm, 42.17Ohm |
| DC Resistance (DCR) - Secondary | 232mOhm, 270mOhm | 244mOhm, 377mOhm, 490mOhm |
| Transformer Type | Push-Pull Audiophile, Ultra-Linear - Tube Output | Push-Pull Audiophile, Ultra-Linear - Tube Output |
| Frequency Range | 30Hz ~ 30kHz | 30Hz ~ 30kHz |
| Frequency Response | ±1dB | ±1dB |
| Voltage - Isolation | 2000V @ 1 Second | 2000V @ 1 Second |
| Insertion Loss | ±1dB | - |
| Return Loss | - | - |
| Power Level | 60W | 60W |
| Operating Temperature | - | - |
| Approval Agency | - | - |
| Mounting Type | Chassis Mount | Chassis Mount |
| Size / Dimension | 4.185" L x 3.125" W (106.30mm x 79.38mm) | 4.250" L x 3.130" W (107.95mm x 79.50mm) |
| Height - Seated (Max) | 3.859" (98.02mm) | 3.810" (96.77mm) |
| Termination Style | Wire Leads | Wire Leads |
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