EDCOR Electronics Corporation
UMM-T Series - 1/2W PC mounted unbalanced line matching transformers.
Impedance
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Design
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 model.
Secondary (Output)
This has three unbalanced tapped output impedances. The impedances depends on the 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.
Surface Mounting
The transformer is mounted on a printed circuit board. The board is designed for surface mounting with the use of four screws (not provided) or with double back tape (not provided). See dimensional drawing.
Transformer Models
| Model | Max. V (20Hz.) | Max. V (40Hz.) | Input "Z" | Output "Z" |
| UMM-T-1 | 5V | 10V | 150/300/600 | 150/300/600 |
| UMM-T-2 | 4V | 8V | 150/600/10K | 150/600/10K |
| UMM-T-3 | 4V | 8V | 150/5K/10K | 150/5K/10K |
| UMM-T-4 | 5V | 10V | 600/1.2K/2.4K | 600/1.2K/2.4K |
| UMM-T-5 | 6V | 12V | 600/10K/15K | 600/10K/15K |
| UMM-T-6 | 6V | 12V | 1K/2.5K/5K | 1K/2.5K/5K |
| UMM-T-7 | 6V | 12V | 2.5K/5K/10K | 2.5K/5K/10K |
| UMM-T-8 | 8V | 16V | 5K/10K/20K | 5K/10K/20K |
| UMM-T-9 | 10V | 20V | 10K/15K/30K | 10K/15K/30K |
| UMM-T-10 | 1.4V | 1.4V | 4/8/16 | 4/8/16 |
| UMM-T-11 | 2V | 2V | 8/16/45 | 8/16/45 |
| UMM-T-12 | 2V | 2V | 16/45/200 | 16/45/200 |
| UMM-T-13 | 4V | 4V | 45/200/600 | 45/200/600 |
Specifications
| Transformer | UMM Series |
| 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 Transformer Insulation | Clear air dry polyester varnish |
| Termination | Eurostyle connectors |
| Mounting |
Surface Mounted |
| Printed Circuit Board |
FR-4 |
| Weight | 0.3 lbs. |
| Compliance | RoHS & REACH |
| Dimensional Drawing | 15000-EI037-037-0T |
| 3D Model (STEP) |
15000-EI037-037-0T |