Hammond Manufacturing 807 Audio Transformer - Equivalent & Substitute Parts

Part Overview

The Hammond Manufacturing 807 is a broadcast quality audio transformer designed for chassis mount applications, operating across the 50Hz to 15kHz frequency range. This transformer features dual impedance configurations on both primary (30, 7.5/7.5 Ohms) and secondary (2.4k, 600/600 Ohms) windings, making it suitable for professional audio signal conditioning and impedance matching applications.

The 807 is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing system maintenance. The 807A serves as the direct active substitute within the Hammond Manufacturing 800 series product line.

Substiute Parts

807

Hammond ManufacturingIn Stock: 832807 Datasheet

Current PartRFQ

807A

Hammond ManufacturingIn Stock: 971807A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Hammond Manufacturing 807 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Impedance matching on primary winding: 30, 7.5/7.5 Ohms
• Impedance matching on secondary winding: 2.4k, 600/600 Ohms
• Frequency response specification: ±0.5dB across 50Hz ~ 15kHz operating range
• Power level rating: 15dB minimum

Mechanical Compatibility Criteria:

• Mounting configuration: Chassis Mount
• Physical form factor compatibility with existing installations

Compliance & Status Criteria:

• RoHS3 compliance requirement
• Active product status for ongoing availability

The Hammond Manufacturing 807A meets all electrical parameters (frequency range, frequency response, power level) and mechanical requirements (chassis mount configuration). Both components maintain identical RoHS3 compliance status. The primary distinction is product status transition from obsolete (807) to active (807A), ensuring supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The Hammond Manufacturing 807A is the direct active equivalent for the obsolete Hammond 807 transformer. Both components maintain identical electrical performance across the specified frequency range (50Hz ~ 15kHz) with matching frequency response (±0.5dB) and power level (15dB) ratings.

Selection of the 807A is supported by:

• Identical impedance configuration on primary (30, 7.5/7.5 Ohms) and secondary (2.4k, 600/600 Ohms) windings
• Matching frequency response and insertion loss characteristics
• Identical chassis mount mechanical configuration
• Equivalent RoHS3 compliance status
• Active product status ensuring supply chain availability

The termination style transition from solder lug (807) to wire leads (807A) requires evaluation of circuit board integration methodology. Wire lead termination may necessitate adapter hardware or circuit board redesign depending on existing PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can the Hammond 807A directly replace the Hammond 807 in existing designs?

A: The 807A provides electrical equivalence across all specified parameters: impedance, frequency response, and power level. Mechanical compatibility is confirmed through identical chassis mount configuration. Termination style differs (wire leads vs. solder lug), requiring assessment of circuit integration approach.

Q: What are the critical parameters for confirming transformer substitution?

A: Substitution validity depends on matching impedance values on both primary (30, 7.5/7.5 Ohms) and secondary (2.4k, 600/600 Ohms) windings, frequency response specification (±0.5dB), and mounting type (chassis mount). All parameters are identical between the 807 and 807A.

Q: Does the 807A meet current compliance requirements?

A: Yes. The 807A maintains ROHS3 compliance status, matching the 807 specification. Both components are REACH Unaffected and classified under ECCN EAR99.

Q: Why is the 807 listed as obsolete?

A: The 807 has been superseded by the 807A within the Hammond Manufacturing product line. The 807A provides equivalent electrical performance with active product status, ensuring ongoing availability and supply chain support.

Q: Are there inventory considerations for component selection?

A: The 807A is currently available with 951 pieces in stock as new original inventory. The obsolete 807 remains available with 754 pieces in stock. For new designs and long-term system support, the 807A is the recommended selection.