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Product Detailed Parameters
- Description：XFMR 3.5K / 4, 8, 16 CHAS MNT
- Series：1600
- Mfr：Hammond Manufacturing
- Package：Box
- Mounting Type：Chassis Mount
- Size / Dimension：4.980" L x 3.750" W (126.49mm x 95.25mm)
- Height - Seated (Max)：4.650" (118.11mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：-
- Impedance - Primary (Ohms)：3.5k
- Impedance - Secondary (Ohms)：4, 8, 16
- DC Resistance (DCR) - Primary：110.1Ohm
- DC Resistance (DCR) - Secondary：634mOhm
- Transformer Type：Single Ended Audiophile, Ultra-Linear - Tube Output
- Frequency Range：20Hz ~ 20kHz
- Frequency Response：±1dB
- Voltage - Isolation：2828VDC @ 1 Second
- Insertion Loss：±1dB
- Return Loss：-
- Power Level：30W
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 1630SEA is a single-ended audio transformer designed for tube output applications. It features a primary impedance of 3500 Ohms and supports secondary impedances of 4, 8, and 16 Ohms. The unit is rated for 30W power handling with a maximum current of 135 mA. Operating frequency ranges from 20Hz to 20kHz. It utilizes chassis mount installation and is constructed for robust electrical signal transformation in audio circuits.
Feature Summary
- Single-ended tube output design
- Multi-tap secondary impedance options
- Chassis mount construction
Applications
- Tube amplifier output stages
- Audio signal transformation
- High-fidelity audio equipment
Procurement Notes
Verify the specific secondary impedance configuration required (4, 8, or 16 Ohms) against the target circuit design before procurement. Confirm that the 3500 Ohm primary impedance matches the vacuum tube plate requirements. Ensure chassis mounting provisions are available in the enclosure. Cross-reference datasheet specifications for thermal limits under continuous operation conditions.
Selection Notes
Select this component when a single-ended topology is mandated for the audio output stage. The 3500 Ohm primary rating suits specific tube types requiring this load impedance. Consider the physical dimensions for chassis integration. Evaluate the 30W power rating against peak signal demands. Verify compatibility with the intended secondary load impedance among the available taps.
Part Context
This component belongs to Hammond Manufacturing's line of audio transformers. It serves as a critical interface between vacuum tubes and loudspeakers or subsequent amplifier stages. The product replaces older transformer designs in vintage audio restoration projects. It provides galvanic isolation and impedance matching for high-quality audio reproduction systems.
Replacement Considerations
Direct substitutes may include other Hammond single-ended audio transformers with matching 3500 Ohm primary impedance. Verify equivalent power ratings and frequency response characteristics. Secondary impedance availability must align with speaker or load requirements. Physical mounting dimensions should be compared for direct replacement scenarios.
FAQ
What are the available secondary impedance options?
The 1630SEA supports secondary impedances of 4, 8, and 16 Ohms.
Is this transformer suitable for push-pull configurations?
No, it is specifically designed for single-ended tube output applications.
