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Product Detailed Parameters
- Description：XFMR 8KCT / 4, 8, 16 CHAS MNT
- Series：A
- Mfr：Hammond Manufacturing
- Package：Box
- Mounting Type：Chassis Mount
- Size / Dimension：3.250" L x 2.500" W (82.55mm x 63.50mm)
- Height - Seated (Max)：3.060" (77.72mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：-
- Impedance - Primary (Ohms)：8kCT
- Impedance - Secondary (Ohms)：4, 8, 16
- DC Resistance (DCR) - Primary：98.98Ohm, 101.9Ohm
- DC Resistance (DCR) - Secondary：154mOhm, 218mOhm, 303mOhm
- Transformer Type：Push-Pull Audiophile, Ultra-Linear - Tube Output
- Frequency Range：30Hz ~ 30kHz
- Frequency Response：±1dB
- Voltage - Isolation：2000V @ 1 Second
- Insertion Loss：-
- Return Loss：-
- Power Level：15W
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 1650E is a shielded audio output transformer designed for tube application power circuits. It features a push-pull configuration with a primary impedance of 8,000 center-tapped ohms and supports secondary impedances of 4, 8, and 16 ohms. The unit has a power rating of 15 W and a maximum DC current of 100 mA. Operating within a frequency range of 30 Hz to 30 kHz, it utilizes terminal end types and measures 2.5 in x 3.25 in x 3.06 in.
Feature Summary
- Push-pull output transformer topology optimized for tube amplifier applications
- Shielded construction to minimize electromagnetic interference
- Multi-tap secondary winding supporting multiple speaker impedance loads
Applications
- Tube-based audio power amplifiers
- Hi-Fi audio signal processing equipment
- Professional sound reinforcement systems
Procurement Notes
Verify the specific pinout configuration against the official datasheet before integration, as terminal arrangements are critical for correct push-pull circuit operation. Confirm that the 100 mA maximum DC current rating aligns with the intended tube plate current requirements to prevent thermal overload or core saturation during continuous operation.
Selection Notes
Select this component when a 15 W push-pull output stage requires an 8k CT primary impedance. Ensure the system accommodates the physical dimensions of 2.5 in x 3.25 in x 3.06 in. Verify compatibility with the available secondary impedance options (4, 8, 16 ohms) to match the load requirements without requiring additional matching networks.
Part Context
This model belongs to the 1608A-1650A series of audio transformers manufactured by Hammond Manufacturing. The series focuses on high-fidelity audio applications, providing reliable signal transformation for vacuum tube circuits. The 1650E represents a standard power output variant within this product line, distinguished by its specific impedance ratios and power handling capabilities.
Replacement Considerations
The 1650PP is a related part number within the same manufacturer's portfolio. While both are audio transformers, the 1650PP specifies a 6.6k CT primary impedance and a 60 W power rating, differing significantly from the 1650E's 8k CT primary and 15 W rating. Direct substitution requires careful verification of circuit impedance matching.
