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Product Detailed Parameters
- Description：AUDIO XFMR 4.15KCT / 2 CHAS MNT
- Series：1750
- Mfr：Hammond Manufacturing
- Package：Bulk
- Mounting Type：Chassis Mount
- Size / Dimension：4.050" L x 3.136" W (102.87mm x 79.65mm)
- Height - Seated (Max)：3.563" (90.50mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：-
- Impedance - Primary (Ohms)：4.15kCT
- Impedance - Secondary (Ohms)：2
- DC Resistance (DCR) - Primary：45.53Ohm, 49.09Ohm
- DC Resistance (DCR) - Secondary：140mOhm
- Transformer Type：-
- Frequency Range：70Hz ~ 15kHz
- Frequency Response：±1dB
- Voltage - Isolation：2000V @ 1 Second
- Insertion Loss：-
- Return Loss：-
- Power Level：50W
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 1750KA is a tube application audio output transformer designed for guitar amplifiers. It features a primary impedance of 4,150 ohms center-tapped and a secondary impedance of 2 ohms. The unit supports a power rating of 50 watts and operates within a frequency range of 70 Hz to 15 kHz. It utilizes wire lead termination and is intended for chassis mounting.
Feature Summary
- Designed specifically for tube-based guitar amplifier output stages
- Provides impedance matching between vacuum tubes and low-impedance speakers
- Constructed with wire leads for direct circuit integration
Applications
- Guitar amplifier output stages
- Tube audio equipment signal transformation
- Speaker impedance matching in vintage audio restoration
Procurement Notes
Verify the specific impedance configuration (4,150 CT primary / 2 ohm secondary) against the target amplifier design requirements. Confirm that the 50-watt power rating aligns with the amplifier's maximum output capabilities. Ensure the chassis mounting style and wire lead termination are compatible with the existing enclosure layout and wiring harness before finalizing procurement.
Selection Notes
Select this component when the amplifier circuit requires a 4,150 ohm center-tapped primary load and a 2 ohm secondary tap. The 50-watt rating must exceed the expected peak power demands of the tube pair. Consider the physical dimensions and weight for chassis space allocation. This model is part of the 1750 series, ensuring compatibility with other components in that product line.
Part Context
This transformer belongs to the Hammond Manufacturing 1750 series, which includes various configurations for different tube amplifier applications. Related models in this series, such as the 1750B and 1750E, offer different primary impedances and power ratings to suit varying tube types and speaker setups. The series is recognized for its use in high-fidelity and musical instrument amplifier designs.
Replacement Considerations
Direct substitutes within the same series include the 1750B (5,482 ohm primary, 8 ohm secondary, 10W) and 1750E (8,500 ohm primary, 8 ohm secondary, 15W). These alternatives differ significantly in impedance and power handling and are not electrically interchangeable without circuit redesign.
