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Product Detailed Parameters
- Description：XFMR 6.95KCT / 4, 8, 16 CHAS MNT
- Series：1760
- Mfr：Hammond Manufacturing
- Package：Box
- Mounting Type：Chassis Mount
- Size / Dimension：3.250" L x 1.687" W (82.55mm x 42.85mm)
- Height - Seated (Max)：2.058" (52.27mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：29.19:1
- Impedance - Primary (Ohms)：6.95kCT
- Impedance - Secondary (Ohms)：4, 8, 16
- DC Resistance (DCR) - Primary：120Ohm
- DC Resistance (DCR) - Secondary：171mOhm, 245mOhm, 476mOhm
- Transformer Type：Push-Pull Audiophile, Ultra-Linear - Tube Output
- Frequency Range：70Hz ~ 15kHz
- Frequency Response：±1dB
- Voltage - Isolation：-
- Insertion Loss：-
- Return Loss：-
- Power Level：15W
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 1760F is a tube guitar amplifier output transformer designed for 15-watt applications. It features a primary impedance of 6,950 ohms center-tapped and secondary taps for 4, 8, and 16 ohms. The unit provides an audio frequency response range from 70Hz to 15kHz with a turns ratio of 29.19:1. Constructed for chassis mounting, this component serves as a direct replacement for specific Fender Blues Junior amplifiers, ensuring compatibility with standard tube amplifier output stages.
Feature Summary
- Designed specifically for 15-watt tube guitar amplifier circuits
- Provides multiple secondary impedance options including 4, 8, and 16 ohms
- Engineered for chassis mounting in standard amplifier enclosures
Applications
- Replacement for Fender Blues Junior amplifier output stages
- Tube guitar amplifier construction and repair
- Audio equipment restoration requiring 15W output transformers
Procurement Notes
Verify the primary impedance matches 6,950 ohms center-tapped and confirm secondary taps include 4, 8, and 16 ohms before installation. Ensure the physical dimensions allow for chassis mounting in the target amplifier enclosure. Cross-reference the part number with the original equipment manufacturer specifications to guarantee electrical compatibility and proper fitment.
Selection Notes
Select this transformer when replacing failed units in 15-watt tube amplifiers, particularly those originally equipped with Hammond components. The 6,950-ohm primary impedance is critical for matching the output tubes' requirements. Verify that the required secondary impedances (4, 8, or 16 ohms) align with the connected speaker cabinet configuration to ensure optimal power transfer and signal integrity.
Part Context
This component belongs to the Hammond Manufacturing Tube Guitar Amplifier Output Transformers series, specifically the 1750 Series. It is engineered to meet the rigorous demands of vintage and modern tube amplifier designs, providing reliable performance in high-fidelity audio reproduction. The series is widely recognized for its durability and consistent electrical characteristics in musical instrument amplification.
Replacement Considerations
Direct substitute for original Hammond output transformers in compatible Fender models. Ensure the new unit matches the 6,950-ohm primary impedance and includes the necessary secondary taps. Physical mounting holes must align with the existing chassis layout to facilitate straightforward installation without modification.
