Request Information
Triad's A-9J Input Transformer provides the durability and precision required in today's demanding designs. Mu-Metal case construction for magnetic field immunity and 60 to 80 dB Hum reduction. Large step-up turns ratio to couple low-level input signals to the grid of the first amplifier tube or, in a multistage system, to the input element of the first transistor amplifier. Low level High Fidelity with excellent Unwanted Noise reduction. Applications include signal pre-amplification, inter-stage isolation, signal level step up/down, and impedance matching.
Unit of Measure

Check Stock

Click here to check stock >>

 N/A

Specifications

Maximum Input Level

 N/A 1 mW

Primary Impedance

 N/A 50 Ohm250 Ohm600 Ohm

Secondary Impedance

 N/A 85000 Ohm

Overall Turn Ratio

 N/A 1:12

Frequency Response at (±) 3 dB

 N/A 30 to 15000

RMS Test Voltage

 N/A 500

Case Type

 N/A J

Connections

 N/A Leads

Case Dimension (H)

 N/A 1-3/4 in

Case Dimension (D)

 N/A 1-3/8 in

Mounting Hole Diameter

 N/A 3/8 in

Maximum Unit Weight

 N/A 0.35 lb

Hum Reduction

 N/A 40 to 60 dB

Features

 N/A
  • Low level high fidelity.
  • Single-hole mounting, allowing rotation for maximum hum reduction.
  • Alloy shielding gives 40 to 60 dB hum reduction.
  • Wide frequency ranges.
  • Flexible leads for ease of mounting.
  • Input units electrostatically and magnetically shielded .
  • Lightweight.
  • Smooth, baked enamel cases, 1-3/8" diameter, 1-3/4" above chassis .
  • Legible circuit diagrams permanently affixed to every case.

Direct Current (DC) Resistance

DC Resistance (Primary)

 N/A 32.7 Ohm

DC Resistance (Secondary)

 N/A 3450 Ohm

Applications

Applications

 N/A

Line or Mike to Grid

Note

Note

 N/A

Static Shield