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Product Detailed Parameters
- Description：AUDIO XFMR 4KCT / 2 CHAS MNT
- Series：1750
- Mfr：Hammond Manufacturing
- Package：Box
- Mounting Type：Chassis Mount
- Size / Dimension：4.063" L x 3.125" W (103.20mm x 79.38mm)
- Height - Seated (Max)：3.516" (89.31mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：44.67:1
- Impedance - Primary (Ohms)：4kCT
- Impedance - Secondary (Ohms)：2
- DC Resistance (DCR) - Primary：43.16Ohm, 46.28Ohm
- DC Resistance (DCR) - Secondary：180mOhm
- Transformer Type：Push-Pull Audiophile, Ultra-Linear - Tube Output
- Frequency Range：70Hz ~ 15kHz
- Frequency Response：±1dB
- Voltage - Isolation：-
- Insertion Loss：-
- Return Loss：-
- Power Level：50W
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 1750K is a tube application power transformer designed for guitar amplifier output stages. It features a single-channel push-pull configuration with wire lead termination and chassis mounting. The primary coil impedance is 4,000 ohms center-tapped (C.T.), while the secondary coil provides an 8-ohm output. The unit has a power rating of 50 watts and operates within a frequency range of 70 Hz to 15 kHz. It is unshielded and weighs approximately 1.36 kg.
Feature Summary
- Designed as a drop-in replacement for original factory units in tube guitar amplifiers
- Push-pull output transformer configuration for single-channel audio applications
- Chassis mount construction with wire lead terminations
Applications
- Tube guitar amplifier output stages
- Audio signal transformer replacements
- Hi-fi amplifier repairs
Procurement Notes
Verify that the required primary impedance matches 4kCT and secondary impedance is 8 ohms. Confirm the power rating of 50W meets the amplifier's design specifications. Ensure the chassis mounting style and wire lead termination are compatible with the existing circuit board or wiring harness. Check for any specific physical dimension constraints before ordering.
Selection Notes
Select this model when a 50-watt push-pull output transformer is needed for tube guitar amplifiers. The 4kCT primary and 8-ohm secondary configuration suits specific vacuum tube pairs. Consider the unshielded design if electromagnetic interference is not a critical concern. Verify compatibility with the target amplifier's chassis dimensions and mounting hardware requirements.
Part Context
The 1750K belongs to the Hammond 1750 series of audio and signal transformers. This series includes various models tailored for different tube amplifier power levels and impedance matching requirements. The 1750K specifically targets mid-to-high power guitar amp applications requiring robust construction and reliable performance.
Replacement Considerations
This component serves as a direct physical and electrical replacement for original factory output transformers in compatible tube guitar amplifiers. Ensure the replacement matches the original unit's pinout and mounting hole spacing.
