UMM Series - 1/2W unbalanced multi tapped line matching transformers.


Sale price$24.81

Shipping calculated at checkout

9 sub-assemblies in stock. Estimated to ship 1 to 2 weeks or less.
Quantity Discounts
10~24 pcs 5% off
25~99 pcs 10% off
100~499 pcs 15% off
500+ pcs 20% off
Orders over 25 pcs may take longer. Please contact us for scheduling and dates.


These audio matchers use high quality low noise components to deliver broadcast and recording quality sound.

Primary (Input)
This has three unbalanced tapped input impedances. The impedances depends on the transformer model.

Secondary (Output)
This has three unbalanced tapped output impedances. The impedances depends on the transformer model.

Magnet Wire
All units are wound with the finest virgin copper magnet wire. All windings use heavy insulated wire to provide excellent manufacturing yield, lower customer cost and superior life.

The Core
EDCOR uses the finest M6 line grain oriented steel cores. Each unit is hand stacked to assure at least 92% stack.

The Bobbin
Injection molded Nylon 6/6 with the addition of 30%-35% glass fibers. The addition of glass fibers allows a higher heat deflection temperature and it brings the material to a class HB UL temperature classification.

This unit is designed for mounting on a printed circuit board. For footprint and suggested hole and pad size, see dimensional drawing.

Transformer Models

Model Max. V (20Hz.) Max. V (40Hz.) Input "Z" Output "Z"
UMM-1 5V 10V 150/300/600 150/300/600
UMM-2 4V 8V 150/600/10K 150/600/10K
UMM-3 4V 8V 150/5K/10K 150/5K/10K
UMM-4 5V 10V 600/1.2K/2.4K 600/1.2K/2.4K
UMM-5 6V 12V 600/10K/15K 600/10K/15K
UMM-6 6V 12V 1K/2.5K/5K 1K/2.5K/5K
UMM-7 6V 12V 2.5K/5K/10K 2.5K/5K/10K
UMM-8 8V 16V 5K/10K/20K 5K/10K/20K
UMM-9 10V 20V 10K/15K/30K 10K/15K/30K
UMM-10 1.4V 1.4V 4/8/16 4/8/16
UMM-11 2V 2V 8/16/45 8/16/45
UMM-12 2V 2V 16/45/200 16/45/200
UMM-13 4V 4V 45/200/600 45/200/600


Wattage 0.5W
Input Maximum Voltage Depends on model.
Input Unbalanced
Primary (input) Impedance Depends on model.
Output Unbalanced
Secondary (output) Impedance Depends on model.
Turns Ratio Depends on model.
Winding Configuration Interleave Winding
Frequency Response 20~20K Hz., <1dBu
THD+Noise <0.05% @ 1K Hz.
Insertion Loss <0.5 dB
Bobbin Material Nylon 6/6 GF-30
Flammability Rating Class HB
Coil Finish Wrapping Polyester Film Electrical Insulating Tape
Core Size
EI38 (0.375" x 0.375")
Core Material M-6 29 ga. grain oriented lamination steel
Secondary Insulation Clear air dry polyester varnish
Termination 8 pin PCB
Printed circuit board (PCB)
Mounting Orientation Laydown
Weight 0.18 lbs.
Compliance RoHS REACH
Dimensional Drawing 15000-EI037-037-P08
3D Model (STEP) 15000-EI037-037-P08

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