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PAM-OT-70-25R is listed in the Audio Transformers range at ChipApex. The manufacturer field lists Pacific Transformer. Its product description is Fender Bassman 70W Output Transf. Review the specifications below when checking this part for your BOM.
Audio Transformers specifications for PAM-OT-70-25R
- Description：Fender Bassman 70W Output Transf
- Series：-
- Mfr：Pacific Transformer
- Package：Tape & Box (TB)
- Mounting Type：Chassis Mount
- Size / Dimension：4.030" L x 3.500" W (102.36mm x 88.90mm)
- Height - Seated (Max)：3.500" (88.90mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：-
- Impedance - Primary (Ohms)：5kCT
- Impedance - Secondary (Ohms)：2, 4
- DC Resistance (DCR) - Primary：-
- DC Resistance (DCR) - Secondary：-
- Transformer Type：General Purpose
- Frequency Range：-
- Frequency Response：-
- Voltage - Isolation：-
- Insertion Loss：-
- Return Loss：-
- Power Level：-
- Operating Temperature：-
- Approval Agency：-
Audio Transformers datasheet and documents for PAM-OT-70-25R
Audio Transformers Overview
The PAM-OT-70-25R is a chassis-mount audio output transformer manufactured by Pacific Audio Magnetics. It features a primary impedance of 5,000 ohms and secondary impedances of 2 ohms and 4 ohms. This component is designed for high-fidelity audio applications, specifically serving as a replacement or upgrade part for vintage-style guitar amplifiers requiring 70-watt output stages.
Audio Transformers Feature Summary
- Designed for high-power audio output stages
- Chassis mount construction for stable installation
- Dual secondary impedance options for flexible speaker matching
Audio Transformers Applications
- Fender Bassman 70W amplifier restoration
- 1976-1980 Fender Pro Reverb amplifier repair
- 70W Bandmaster amplifier maintenance
Audio Transformers Procurement Notes
Verify the specific amplifier model compatibility before purchase, as this transformer is tailored for 70-watt circuits. Confirm that the required secondary impedance (2 ohm or 4 ohm) matches the existing speaker configuration. Ensure the chassis mounting style aligns with the physical space constraints of the target amplifier chassis to guarantee proper fitment.
Audio Transformers Selection Notes
Select this unit when replacing failed output transformers in vintage-style 70-watt tube amplifiers. The dual secondary taps allow for adaptation to different speaker cabinet impedances. Consider this component for restorations aiming to maintain original circuit topology while ensuring reliable power delivery to the load.
Audio Transformers Part Context
Pacific Audio Magnetics produces this transformer as part of their vintage replica series. It is intended for use in classic American guitar amplifier designs. The product line focuses on replicating the electrical characteristics of original equipment manufacturer components for professional audio repair and restoration markets.
Audio Transformers Replacement Considerations
This unit replaces standard output transformers in compatible 70-watt Fender-style amplifiers. Verify pinout and mounting hole alignment against the original factory part. Ensure the new transformer meets the thermal and electrical requirements of the specific amplifier circuit being serviced.
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