UTC Line Matching Interstage Isolation Transformer Preamp 3300 150 600 Ohm

ADC 600 Ohm iso Balancing Transformer Pair Mini Audio

Triad Input Output transformer 8k to 600 ohm Line

Ampex Atr700 Output Transformer Pair 20ohm To 600 Ohm

VINTAGE SESCOM MI-53 AUDIO TRANSFORMER 150/600 ohm Primary 600 Ohm secondary

Ferrodyne Audio Transformer 600 1:1 722849-7 Line Output

Altec 15095A 150/600 ohm to 15k ohm step up transformer, for moving coil, QTY 1

1:1 Or Step Up Atlantic Transformer 600 Ohm 200/600 CT