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Product Detailed Parameters
- Description：TRANSFORMER
- Series：108
- Mfr：Hammond Manufacturing
- Package：Bulk
- Mounting Type：Through Hole
- Size / Dimension：1.030" L x 0.770" W (26.16mm x 19.56mm)
- Height - Seated (Max)：0.770" (19.56mm)
- Termination Style：PC Pin
- Turns Ratio - Primary:Secondary：1:01
- Impedance - Primary (Ohms)：600CT
- Impedance - Secondary (Ohms)：600CT
- DC Resistance (DCR) - Primary：65Ohm
- DC Resistance (DCR) - Secondary：69Ohm
- Transformer Type：Miniature Epoxy Potted
- Frequency Range：300Hz ~ 50kHz
- Frequency Response：±1.5dB
- Voltage - Isolation：100V
- Insertion Loss：-
- Return Loss：-
- Power Level：150mW
- Operating Temperature：-40°C ~ 105°C
- Approval Agency：-
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Overview
The Hammond Manufacturing 108H-BULK is an audio transformer designed for tube applications, including high-fidelity and guitar amplifiers. It features a molded case with epoxy potting and pin-type PC board mount with a minimum pin length of 0.187 inches. The unit supports soldering at 260°C for 10 seconds and operates at ambient temperatures up to 85°C. Dimensions are 1.030L x 0.770W inches (26.16mm x 19.56mm). Packaging is bulk.
Feature Summary
- Epoxy potted in a molded case
- Pin type PC board mount
- Suitable for tube driver and output applications
Applications
- Audio input transformers
- Line matching transformers
- Output transformers for tube circuits
Procurement Notes
Verify the specific impedance ratio and power rating against the official datasheet, as the 108 series includes multiple variants. Confirm that the bulk packaging meets your assembly requirements. Ensure the component is sourced from authorized distributors to guarantee authenticity and compliance with RoHS standards where applicable.
Selection Notes
Select this model for through-hole mounting on printed circuit boards. Consider the physical dimensions and pin spacing for layout compatibility. Evaluate the thermal tolerance for soldering processes and operating environments. Compare electrical characteristics with other 108 series parts to ensure the correct impedance transformation for the specific audio application.
Part Context
This component belongs to the Hammond 108 Series of classic audio transformers. These products are engineered for tube-based audio equipment, providing high-quality magnetics for drivers and outputs. The series offers various impedance configurations to suit different amplifier designs and signal processing needs.
Replacement Considerations
Check the 108K variant for similar mounting but different electrical specifications. Verify if other Hammond 108 series models meet the required impedance and power ratings. Cross-reference with generic audio transformers only if they match the exact pinout and form factor.
