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A-69J is listed in the Audio Transformers range at ChipApex. The manufacturer field lists Triad Magnetics. Its product description is XFMR 25K 6.25K/6.25K / 500 125. Review the specifications below when checking this part for your BOM.
Audio Transformers specifications for A-69J
- Description：XFMR 25K 6.25K/6.25K / 500 125
- Series：J
- Mfr：Triad Magnetics
- Package：Bulk
- Mounting Type：Chassis Mount
- Size / Dimension：-
- Height - Seated (Max)：-
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：7.1:1
- Impedance - Primary (Ohms)：25k, 6.25k/6.25k
- Impedance - Secondary (Ohms)：500, 125/125
- DC Resistance (DCR) - Primary：2.5kOhm
- DC Resistance (DCR) - Secondary：50Ohm
- Transformer Type：Impedance Matching
- Frequency Range：50Hz ~ 20kHz
- Frequency Response：±3dB
- Voltage - Isolation：-
- Insertion Loss：-
- Return Loss：-
- Power Level：100mW
- Operating Temperature：-
- Approval Agency：-
Audio Transformers datasheet and documents for A-69J
Audio Transformers Overview
The Triad Magnetics A-69J is an audio transformer from the Red-Spec series, designed for chassis mounting. It features a primary impedance of 25k ohms and dual secondary impedances of 6.25k ohms each. The turns ratio is 7.1:1. The unit operates within a frequency range of 50Hz to 20kHz. It utilizes through-hole termination with gold-plated leads and an epoxy molded case.
Audio Transformers Feature Summary
- Epoxy molded encapsulation for mechanical protection
- Gold-plated leads for reliable soldering connections
- Dual secondary windings for flexible impedance matching
Audio Transformers Applications
- Audio signal coupling in tube amplifier circuits
- Impedance matching between vacuum tubes and loads
- Professional audio equipment interstage coupling
Audio Transformers Procurement Notes
Verify the specific manufacturing date code against current production status, as availability may vary. Confirm that the physical dimensions and lead spacing match the target chassis layout. Ensure the operating environment remains within the specified temperature limits to maintain performance integrity over time.
Audio Transformers Selection Notes
Select this component when a 25k primary impedance is required for tube output stages. The dual 6.25k secondaries allow for parallel or series configurations to suit different load requirements. Verify compatibility with the intended frequency response needs up to 20kHz for high-fidelity audio applications.
Audio Transformers Part Context
This part belongs to the Triad Magnetics Red-Spec series, known for high-quality audio transformers. The A-69J specifically addresses the needs of high-vacuum tube circuit designs requiring precise impedance transformation. It serves as a critical interface component in vintage and modern tube-based audio systems.
Audio Transformers Replacement Considerations
No direct public substitute part numbers are confirmed in the provided documentation. Consult manufacturer catalogs for equivalent impedance ratios and form factors if sourcing alternatives.
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