Hammond Manufacturing Push-Pull Tube Audio Output Transformers

Hammond Manufacturing Push-Pull Tube Audio Output Transformers are designed for general-purpose use and, depending on the series, replacement use in push-pull tube output circuits. The 125A-125E Series, 125H Series, and 125J Series all feature 150Hz to 15kHz frequency response at full rated power (±1dB max., ref. 1kHz). The 1608-1650 Series, 1608A-1650A Series, and 1650P Series all offer 30Hz to 30kHz minimum frequency response at full rated power (±1dB max., ref. 1kHz). Hammond Manufacturing Push-Pull Tube Audio Output Transformers are RoHS compliant and designed for maximum versatility.

Features

125A-125E Series
- Open style with minimum 5″ long primary leads
- Secondary solder lugs for convenient secondary connections (except 125B, which uses minimum 5″ secondary leads)
- 1200Ω to 25,000Ω primary impedances
- 1.5Ω to 15Ω secondary impedances
- 125SE Series designed for single-ended use
125H Series
- Open style with minimum 5″ long primary leads, secondary solder lugs for convenient secondary connections
125J Series
- Open style with minimum 10″ long primary and secondary leads
1608-1650 Series
- Enclosed (shielded), four-slot, chassis Type X mounting
- 8″ minimum insulated flexible leads
- Manufactured with plastic coil forms for coil support and insulation

1608A-1650A Series
- Provides ample “headroom” at bass frequencies (note the weight of each transformer, which ranges from 2.5lbs to 28lbs)
- Secondary tapped for 4Ω, 8Ω, or 16Ω outputs
- Enclosed (shielded), four-slot, above-chassis Type X mounting
- Manufactured with plastic coil forms for coil support and insulation
- 8″ minimum insulated flexible leads
- Includes 40% screen taps for ultra-linear operation if desired (except 1650G)
1650P Series
- Ideal match to Hammond 300P potted transformers
- Enclosed in a drawn steel case and completely potted in epoxy
- Lead connection is via 10 bottom-mounted lugs
- Includes 40% screen taps for ultra-linear operation if desired
- Finished in a black powder paint

Applications

Push-pull tube output transformers (all series)
General purpose (125A-125E Series, 125H Series, and 125J Series)
Push-pull: triode, ultra-linear pentode, pentode, and tetrode connected audio output (1608-1650 Series, 1608A-1650A Series, and 1650P Series) (note: 1650G does not support ultra-linear)

Specifications

Frequency response at full rated power (±1dB max., ref. 1kHz)
- 150Hz to 15kHz (125A-125E Series, 125H Series, and 125J Series)
- 30Hz to 30kHz (1608-1650 Series, 1608A-1650A Series, and 1650P Series)
RoHS compliant

Hammond Manufacturing Push-Pull Tube Audio Output Transformers

Features

Applications

Specifications

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