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Product Detailed Parameters
- Description：XFMR 4.3KCT / 4, 8, 16 CHAS MNT
- Series：1600
- Mfr：Hammond Manufacturing
- Package：Bulk
- Mounting Type：Chassis Mount
- Size / Dimension：4.185" L x 3.125" W (106.30mm x 79.38mm)
- Height - Seated (Max)：3.859" (98.02mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：-
- Impedance - Primary (Ohms)：4.3kCT
- Impedance - Secondary (Ohms)：4, 8, 16
- DC Resistance (DCR) - Primary：82.5Ohm
- DC Resistance (DCR) - Secondary：232mOhm, 270mOhm
- Transformer Type：Push-Pull Audiophile, Ultra-Linear - Tube Output
- Frequency Range：30Hz ~ 30kHz
- Frequency Response：±1dB
- Voltage - Isolation：2000V @ 1 Second
- Insertion Loss：±1dB
- Return Loss：-
- Power Level：60W
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 1650N is a shielded audio output transformer designed for push-pull tube amplifier circuits. It features a primary impedance of 4,300 ohms center-tapped with a maximum DC current of 318 mA. The secondary winding provides selectable impedances of 4, 8, and 16 ohms. Rated at 60W, the unit operates within a frequency range of 30 Hz to 30 kHz. It utilizes above-chassis Type X mounting with four slots and measures 3.13 inches in length.
Feature Summary
- Designed specifically for push-pull tube output stages
- Enclosed and shielded construction for noise reduction
- Supports multiple secondary load impedances
Applications
- Push-pull vacuum tube amplifier output stages
- High-fidelity audio equipment reconstruction
- Vintage audio restoration projects
Procurement Notes
Verify the specific datasheet version to confirm the exact primary impedance rating, as variations exist within the 1650 series. Ensure the mounting configuration matches the chassis design requirements. Confirm RoHS compliance status if required by project specifications. Cross-reference the secondary impedance taps with the intended speaker load.
Selection Notes
Select this model when a 60W push-pull tube output transformer is required. Compare against the 1650E if lower power (15W) or different primary impedance (8k) is needed. Consider the 1650HA for chassis-mounted applications instead of above-chassis installation. Verify physical dimensions fit the available enclosure space.
Part Context
This component belongs to the Hammond 1650 series of audio transformers. These units are engineered for high-power tube amplifier applications. The series includes various configurations differing in power rating, impedance, and mounting style. The 1650N represents a specific variant optimized for 60W push-pull operation with standard multi-tap secondary outputs.
Replacement Considerations
The 1650PP is a discontinued alternative with similar push-pull characteristics but differs in primary impedance (6.6kCT vs 4.3kCT) and power rating (60W). The 1650HA offers chassis mounting rather than above-chassis installation. Direct substitution requires verifying circuit compatibility with the alternative impedance values.
