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Isolation transformers

TypeTurns RatioSize LxWxHMax PrimlevelApplications / Comments
LL15271+1 : 1+138x24x17+16 dBUThe "standard" problem solver. Ground isolation, MS decoding, splitting 1 direct + 1 isolated outputs. Mic input 200:800 Ω.
LL1527A1+1 : 1+138x24x17+16 dBUAs LL 1527. Secondary shields available individually on connector pins.
LL1527XL1+1 :1+138x24x20.5+19 dBUAs LL1527, but with + 3 dB level capability compared to the LL1527.
LL1532
1+1 : 228x17x15+10 dBUA small size audio transformer. For isolation and microphone input (200:800 Ω).
LL15701+1 : 1+138x24x17+16 dBUSplitting 1 direct + 1 isolated outputs. Extra wide bandwidth. Microphone input (200 : 800 Ω).
LL1570XL1+1 : 1+138x24x20.5+19 dBUAs LL1570, but with + 3 dB level capability compared to the LL1570.
LL1588 1+1 : 1+147x28x24+28 dBUHigh level isolation applications 1:2 microphone input. Phase splitting.
LL16841+1 : 1+142x28x22+25 dBUAmorphous core version of LL1588. High level isolation applications 1:2 microphone input. Phase splitting.
LL79021+1+1+1 :1+1+1+166x32x21+28 dBUHigh level high quality general purpose transformer for very demanding applications. "When only the best is good enough".


Splitting transformers

TypeTurn RatioSize LxWxHMax PrimlevelApplications / Comments
LL1581XL1+1 : 1+138x24x20.5+13 dBU (Prim in parallel)Splitting 1 direct + 2 isolated outputs. Very high immunity to external magnetic fields and to large ground differences.
LL15831 : 1+128x17x15 +8 dBU Splitting 1 direct + 2 isolated outputs. Small size mic. level transformer with the same excellent noise immunity as the LL1581XL.
LL79041+1: 1+166x32x21 +23dBU (Prim. in parallelVery high level splitting transformer for 1 direct + 2 isolated outputs. Very high immunity to external magnetic fields and to large ground differences.
LL15901 : 1+1+147x28x23+13 dBUSplitting1 direct + 3 isolated outputs.

Transformer DIN unit

Lundahl transformers DIN unitjpg

Most of the transformers above can be mounted in our DIN housing using our kit, for easy onsite installation.

For your convenience, the following selected units are fully assembled and ready to install.

Complete DIN units

Pre-assembled units with screw terminals, ready to install
TypeApplications / Comments
DIN1527Provides galvanic isolation and splitting 1 direct + 1 isolated. It is suitable for low-to-medium signal levels.
DIN1581xl Provides galvanic isolation and splitting 1 direct + 1 isolated. It is suitable for medium-to-high signal levels.
DIN1588Is intended for splitting 1 direct + 2 isolated. It is suitable for mic and line level signals up to +13 dBU.