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Triad is pleased to relaunch our J series of shielded audio impedance matching transformers. The parts are manufactured in our California facility, not far from Venice. CA where they were originally produced, all in strict accordance to the original designs, materials and processes.

Vintage audio recording gear is very popular today, due in some part to the nature of digital recording and the desire to "warm" up the audio signal using vacuum tubes and transformers; as well as the history of the original recording equipment that was used to create, essentially, the American songbook of recorded popular music.  Triad transformers were a big part of some of the most important equipment that is still used today in every major recording studio, as well as new recreations of the same vintage circuits used in the booming home recording market.




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Item #

Item Name

Maximum Input Level

Primary Impedance

Secondary Impedance

DC Resistance (Primary)

DC Resistance (Secondary)

Overall Turns Ratio

N/A 32.7 Ohm Primary DC Resistance J Series Audio Transformer N/A 1 mW N/A 50 Ω250 Ω600 Ω N/A 85000 Ω N/A 32.7 Ω N/A 3450 Ω N/A 1:12
N/A 33.7 Ohm Primary DC Resistance J Series Audio Transformer N/A 1 mW N/A 150 Ω600 Ω N/A 60000 Ω N/A 33.7 Ω N/A 4040 Ω N/A 1:10.16
N/A 53.4 Ohm Primary DC Resistance J Series Audio Transformer N/A 1 mW N/A 225 Ω900 Ω N/A 60000 Ω N/A 53.4 Ω N/A 4178 Ω N/A 1:8.7
N/A 50 Ohm Primary DC Resistance J Series Audio Transformer N/A 10 mW N/A 50 Ω250 Ω600 Ω N/A 60000 Ω N/A 50 Ω N/A 5000 Ω N/A 1:10
N/A 50 Ohm Primary DC Resistance J Series Audio Transformer N/A 10 mW N/A 150 Ω600 Ω N/A 60000 Ω N/A 55 Ω N/A 5300 Ω N/A 1:10
N/A 62 Ohm Primary DC Resistance J Series Audio Transformer N/A 1 mW N/A 50 Ω110 Ω200 Ω300 Ω600 Ω N/A 150 Ω600 Ω N/A 62 Ω N/A 70 Ω N/A 1:1
N/A 50 Ohm Primary DC Resistance J Series Audio Transformer N/A 100 mW N/A 125 Ω500 Ω N/A 500 Ω2000 Ω N/A 50 Ω N/A 200 Ω N/A 1:2
N/A 50 Ohm Primary DC Resistance J Series Audio Transformer N/A 100 mW N/A 125 Ω500 Ω N/A 1000/250 Ω16 Ω N/A 50 Ω N/A 1.5 Ω N/A 5.6:1
N/A 10 Ohm Primary DC Resistance J Series Audio Transformer N/A 500 mW N/A 25 Ω100 Ω N/A 10 Ω40 Ω N/A 10 Ω N/A 4 Ω N/A 1.58:1
N/A 50 Ohm Primary DC Resistance J Series Audio Transformer N/A 100 mW N/A 125 Ω500 Ω N/A 25 Ω100 Ω N/A 50 Ω N/A 10 Ω N/A 2.24:1
N/A 302 Ohm Primary DC Resistance J Series Audio Transformer N/A 200 mW N/A 1000 Ω N/A 50 Ω200 Ω N/A 302 Ω N/A 138 Ω N/A 2.2:1
N/A 1000 Ohm Primary DC Resistance J Series Audio Transformer N/A 100 mW N/A 2500 Ω10000 Ω N/A 500 Ω2000 Ω N/A 1000 Ω N/A 200 Ω N/A 2.24:1
N/A 1540 Ohm Primary DC Resistance J Series Audio Transformer N/A 10 mW N/A 15000 Ω N/A 115000 Ω N/A 1540 Ω N/A 4020 Ω N/A 1:2.76
N/A 1392 Ohm Primary DC Resistance J Series Audio Transformer N/A 32 mW N/A 15000 Ω N/A 80000 Ω N/A 1392 Ω N/A 8109 Ω N/A 1:2.3
N/A 1020 Ohm Primary DC Resistance J Series Audio Transformer N/A 100 mW N/A 15000 Ω N/A 50 Ω250 Ω600 Ω N/A 1172 Ω N/A 50.85 Ω N/A 2.5:1
N/A 47 Ohm Primary DC Resistance J Series Audio Transformer N/A 50 mW N/A 150 Ω600 Ω N/A 150 Ω600 Ω N/A 47 Ω N/A 40 Ω N/A 1.4:1:1
N/A 1630 Ohm Primary DC Resistance J Series Audio Transformer N/A 100 mW N/A 15000 Ω N/A 150 Ω600 Ω N/A 1630 Ω N/A 73 Ω N/A 5:1
N/A 1740 Ohm Primary DC Resistance J Series Audio Transformer N/A 100 mW N/A 15000 Ω N/A 50 Ω250 Ω600 Ω N/A 1740 Ω N/A 81.2 Ω N/A 5:1
N/A 1723 Ohm Primary DC Resistance J Series Audio Transformer N/A 100 mW N/A 15000 Ω N/A 150 Ω600 Ω N/A 1723 Ω N/A 81 Ω N/A 5:1
N/A 2500 Ohm Primary DC Resistance J Series Audio Transformer N/A 100 mW N/A 6250 Ω25000 Ω N/A 125 Ω500 Ω N/A 2500 Ω N/A 50 Ω N/A 7.1:1
N/A 112 Ohm Primary DC Resistance J Series Audio Transformer N/A 100 mW N/A 2000 Ω N/A 150 Ω600 Ω N/A 112 Ω N/A 48.5 Ω N/A 1.82:1
N/A 40 Ohm Primary DC Resistance J Series Audio Transformer N/A 50 mW N/A 150 Ω600 Ω N/A 150 Ω600 Ω N/A 40 Ω N/A 44 Ω N/A 1:1
N/A 43.8 Ohm Primary DC Resistance J Series Audio Transformer N/A 50 mW N/A 150 Ω600 Ω N/A 150 Ω600 Ω N/A 35 Ω N/A 42 Ω N/A 1:1
N/A 470 Ohm Primary DC Resistance J Series Audio Transformer N/A N/A 16 Ω N/A N/A 470 Ω N/A N/A
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