Transformer - Lehle, Audio, Line Isolation, High Impedance

Lehle
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Transformer - Lehle, Audio, Line Isolation, High Impedance

$61.88
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Originally: $68.75
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  • 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.

RoHS Compliant
SKU:
P-T-LEHLE-HZ-L
Item ID:
043846
UPC/EAN:
4260142210453
Brand:
Lehle
Product Measurements by Type
Capacitance primary to secondary winding143 pF
Capacitance secondary winding to shield92 pF
Common mode rejection ratio (1kHz)87 dB
Common mode rejection ratio (50Hz)111 dB
ComplianceRoHS II according to Directive 2011/65/EU
Distortion (THD)0.003 %
Frequency response total range4 Hz - 450 kHz
Height21mm [0.83"]
Input impedance885 kΩ
Lead Length90mm [3.54"]
Leakage inductance670 mH
Length32mm [1.26"]
Level audio range (20 Hz)-0.2 dBu
Level audio range (20 kHz)-0.04 dBu
Load impedance7.5 MΩ
Magnetic coupling98 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 Center18mm [0.71"]
Mounting Hole ThreadingM3
Phase shift (20 Hz)
Phase shift (20 kHz)-2°
Primary DC resistance74 Ohm
Primary inductance56 H
Secondary DC resistance85 Ohm
Self resonance point375 kHz
Temperature range-20 °C [-4 °F] - +125 °C [257 °F]
Turns ratio1:1
Voltage gain-0.06 dB
Weight63 g [2.3 oz]
Width32mm [1.26"]
Packaging Information
Packaging Dimensions1.271 in. × 1.261 in. × 1.831 in.
Weight (Packaging)0.146 lbs.
PDF: DatasheetAll Models

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Questions and Answers

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Asked by Anonymous on August 18th, 2020.
BradWbr
August 18th, 2020
Staff Member
Height 21mm [0.83"] Length 32mm [1.26"]

Product Reviews

5.00 out of 5 based on 1 reviews
- October 16th, 2020
5 out of 5

I wanted an isolation transformer that I could use directly with an electric guitar (i.e. no buffer amplifier). This transformer is 3dB down at 40Hz when driving from a 10k Ohm source into a 1M Ohm load. It fits the application perfectly.