Lundahl Medium impendance unit, LL1584-PHF3MX

High level, 600 ohms to 600 ohms transformer unit LL1584

The XLR inline transformer unit LL1584 is designed for breaking up ground loops and for balanced-to-unbalanced conversion in mobile or stationary audio systems. The unit is magnetically shielded and contains a medium impedance isolation transformer LL1584, with LF saturation above +17 dBU @ 50 Hz.

The two ends of the units are galvanically isolated from each other.

The LL1584 is available in four versions:
LL1584-3FXNP2C Female XLR connector to 2-pole A-gauge 1/4 jack plug
LL1584-PHF3MX Female Phono (RCA) connector to male XLR connector
LL1584-3FXPHM Female XLR connector to Phono (RCA) male
LL1584-3FX3MX Female XLR connector to male XLR connector

Electrical characteristics

Transformer static resistance primary + secondary: 640 ?
Core: Amorphous strip core
Max signal level (THD less than 1%): +17 dBU @ 50 Hz
No-load impedance @0 dBU, 50Hz: 11 k? typically
Frequency response @ 0 dBU (source 150?, load 10k?): 10 Hz - 70 kHz +/- 0.5 dB
Distortion (THD) at 50 Hz (source 150?): < 0.2 % @ 50 Hz, for all signal levels -2 through +16 dBU
Loss across transformer with load 10k?: 0.5 dB
Isolation between input and output sides: 1 kV