Transformer - Hammond, Direct Box Transformer

Transformer - Hammond, Direct Box Transformer

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Studio Grade Impedance Matching, 1140 Series.


  • Designed with Nickel alloy cores for high performance and Wide Bandwidth
  • Frequency Response: 20 Hz – 20 kHz ±0.35 dB, (ref. @ 1 kHz)
  • Low distortion at levels up to +27 dBu @ 20 Hz.
  • Excellent Shielding – Mu Metal enclosures
Part No. Impedance Ratio Turns Ratio Max Input @ 20Hz THD @ 20Hz Frequency Response 20Hz / 20kHz
P-T1140-DB-A 200K:1.5K 12:1 +22 dBu 0.02% -0.07 dB/-0.07 dB
RoHS Compliant
Item ID:
Hammond Part Number:
Product Measurements by Type
Capacitance, primary to shield and case550 pF
Capacitance, secondary to shield and case480 pF
Commond Mode Rejection Level @ 3 kHz60 dB
Commond Mode Rejection Level @ 60 Hz70 dB
DCR Primary4.25 kΩ
DCR Secondary72 Ω
Dielectric Strength500 Vrms
Frequency Response-0.06 to -0.07 dB
Input Impedance200 kΩ
Item Diameter1.25 in.
Item Height1.069 in.
Item Width2.25 in.
Mounting Hole Center to Center1.875 in.
Mounting Hole Length0.2 in.
Mounting Hole Width0.3125 in.
Mounting Tab Width0.4 in.
Output Impedance1.5 kΩ
Phase Shift @ 20 Hz2.25°
Phase Shift @ 20 kHz-10°
Primary Input Impedance140 kΩ
Secondary Output Impedance150 Ω
Turns Ratio11.54:1
Packaging Information
Packaging Dimensions2.25 in. × 1.25 in. × 1.07 in.
Weight (Packaging)0.2 lbs.

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PDF: Specification Sheet Specification Sheet254.2 KB

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