1509J

The 1509- and 1509J-series devices are mechanically variable, passive delay lines. The signal input (IN) is reproduced at the tap output (TAP), shifted by an amount which can be adjusted between 0 and T_D, where T_D is the 1509- and 1509J-series dash number. The fixed output (OUT) reproduces the input, delayed by T_D, and must be terminated to match the characteristic impedance of the line, which is given by the letter code that follows the dash number (See Table). The tap output is unbuffered. The 3dB bandwidth of the line is given by 0.35 / T_R, where T_R is the rise time of the 1509- and 1509J-series (See Table).