Transformer - Lehle, Audio, Line Isolation, High Impedance
- High Impedance 1:1 Line Isolation Audio Transformer
- Galvanic isolation of audio signals at line or musical instrument level
- Transforms balanced to unbalanced line signals or unbalanced to balanced line signals
- Toroidal ringcore design for a extremely low loss, strong coupling and a very low noise
- Frequency response of 4 Hz to 450 kHz - 3 dB
- CMRR of 111 dB at 50 Hz
- Input levels of up to 19.5 dBu at 50 Hz
- Low distortion of 0.003 % at 1 kHz / 0 dBu
- Wide impedance range of signal sources, from high to low impedance
- Electrical isolation of 2 kV between shield, secondary and primary windings
- Comes in a magnetic shielded enclosure
- Completely potted to avoid microphonic issues
- Comes with leads
The Lehle Transformer HZ is the ideal component to avoid hum loops or to balance and unbalance signals without degrading the sound of high impedance signal sources. When these signals from passive pickups of stringed instruments or from vintage tube equipment for example are isolated by standard transformers, the load of these transformer normally degrade the sound. These very weak signals deserve a special transformer that does not load the signal. The self load of the LEHLE TRANSFORMER HZ is in the range over 5 MOHM at 1kHz. This minimal load in combination with the really strong coupling of the windings plus the excellent bandwidth guarantee that no detail of your sound gets lost.
With the maximum level of 7.3 VRMS at 50 Hz and very low distortion it is perfectly suited to pro audio environments which run typically with 1.2 VRMS (+4 dBu) level. It will also work perfectly with high end audio devices for home use. Using the Lehle Transformer HZ as an input or output transformer also prevents your device and the user from electrical shocks through it’s dielectric withstanding voltage of 2 kV.
The toroidal core of the transformer is completely potted into the magnetically shielded enclosure, so there will be no microphonic issues. The HZ-L version with the coloured leads comes with two M3 screws, which make it very easy to mount.
Capacitance primary to secondary winding | 143 pF | ||
Capacitance secondary winding to shield | 92 pF | ||
Common mode rejection ratio (1kHz) | 87 dB | ||
Common mode rejection ratio (50Hz) | 111 dB | ||
Compliance | RoHS II according to Directive 2011/65/EU | ||
Distortion (THD) | 0.003 % | ||
Frequency response total range | 4 Hz - 450 kHz | ||
Height | 21mm [0.83"] | ||
Input impedance | 885 kΩ | ||
Lead Length | 90mm [3.54"] | ||
Leakage inductance | 670 mH | ||
Length | 32mm [1.26"] | ||
Level audio range (20 Hz) | -0.2 dBu | ||
Level audio range (20 kHz) | -0.04 dBu | ||
Load impedance | 7.5 MΩ | ||
Magnetic coupling | 98 dB | ||
Maximum input level (20Hz) | 11.5 dBu / 2.9 VRMS | ||
Maximum input level (50Hz) | 19.5 dBu / 7.3 VRMS | ||
Mounting Hole Center to Center | 18mm [0.71"] | ||
Mounting Hole Threading | M3 | ||
Phase shift (20 Hz) | 5° | ||
Phase shift (20 kHz) | -2° | ||
Primary DC resistance | 74 Ohm | ||
Primary inductance | 56 H | ||
Secondary DC resistance | 85 Ohm | ||
Self resonance point | 375 kHz | ||
Temperature range | -20 °C [-4 °F] - +125 °C [257 °F] | ||
Turns ratio | 1:1 | ||
Voltage gain | -0.06 dB | ||
Weight | 63 g [2.3 oz] | ||
Width | 32mm [1.26"] |
Packaging Dimensions | 1.271 in. × 1.261 in. × 1.831 in. | ||
Weight (Packaging) | 0.1411 lbs. |
Datasheet | All Models |
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