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Product Detailed Parameters
- Description：AUDIO XFMR 5K, 8K / 3.2 CHAS MNT
- Series：1750
- Mfr：Hammond Manufacturing
- Package：Box
- Mounting Type：Chassis Mount
- Size / Dimension：2.813" L x 1.560" W (71.45mm x 39.62mm)
- Height - Seated (Max)：1.746" (44.35mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：49.16:1
- Impedance - Primary (Ohms)：5k, 8k
- Impedance - Secondary (Ohms)：3.2
- DC Resistance (DCR) - Primary：314.2Ohm
- DC Resistance (DCR) - Secondary：295mOhm
- Transformer Type：Single Ended Audiophile, Ultra-Linear - Tube Output
- Frequency Range：70Hz ~ 15kHz
- Frequency Response：±1dB
- Voltage - Isolation：-
- Insertion Loss：-
- Return Loss：-
- Power Level：5W
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 1750C is a tube application power transformer designed for guitar amplifier output stages. It features a single-channel configuration with wire lead termination and an unshielded construction. The unit has a power rating of 5W, operating within a frequency range of 70 Hz to 15 kHz. Primary impedance options include 5k ohms or 8k ohms center-tapped, while the secondary impedance is fixed at 3.2 ohms. Physical dimensions are 2.813 inches in length, 1.560 inches in width, and 1.746 inches in maximum seated height.
Feature Summary
- Designed as a drop-in replacement for original factory units to preserve stock tone characteristics
- Constructed using material specifications and design specs closely matching original parts
- Features wire lead termination for direct integration into amplifier circuits
Applications
- Tube guitar amplifier output stages
- Replacement for vintage amplifier output transformers
- Audio signal transformation in tube-based equipment
Procurement Notes
Verify primary impedance requirements (5k or 8k CT) against existing circuit schematics before procurement. Confirm secondary impedance matches the speaker load (3.2 ohms). Ensure physical clearance accommodates the specified dimensions. Check RoHS compliance status if required by specific manufacturing standards. Validate that the unshielded design does not introduce unwanted noise in sensitive audio paths.
Selection Notes
Select this model when replacing original Hammond or compatible output transformers in tube guitar amplifiers requiring a 5W rating. Choose based on primary impedance compatibility with the amplifier's output tubes. Consider the unshielded nature for applications where external shielding is provided or noise immunity is sufficient. Verify physical fitment within the amplifier chassis due to specific dimensional constraints.
Part Context
The 1750C belongs to the Hammond 1750 Series, a line of tube guitar amplifier output transformers. This series is widely recognized for providing accurate replacements for classic amplifier models, maintaining historical tonal qualities. The 1750C specifically targets lower-power amplifier configurations compared to higher-wattage variants in the same series.
Replacement Considerations
Direct substitutes include other Hammond 1750 series variants with matching 5W ratings and 3.2-ohm secondary impedance. Verify primary impedance alignment (5k or 8k CT) with the original transformer. Cross-reference with original manufacturer part numbers for specific amplifier models to ensure functional equivalence.
