Hammond 102K 10k:2k Ohm CT Interstage PCB Audio Transformer
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Create Free Business AccountKey Features
- Interstage: 10000 ohm primary to 2000 ohm CT secondary
- 2.5 mA max primary DC
- Bifilar-wound center-tapped secondary
- 20 mW, 1.5 dB insertion loss, -1 dB at 310 Hz
- DCR 1585 ohms primary, 260 ohms secondary (+/- 15%)
- Sealed black epoxy, 0.025 in square pins, 100 V peak
The 102K is the highest-impedance interstage transformer in the 102 Series, coupling a 10000 ohm primary to a 2000 ohm center-tapped secondary. It is built for P.C. board audio circuits where a high-impedance stage feeds a balanced load.
The secondary is center tapped and, like the other center-tapped units in the series, uses a bifilar winding technique for balanced resistive and capacitive characteristics. The body is rugged black epoxy potting, producing a completely sealed unit. It mounts with square pins, 0.025 in square typical, and unused connections have no pin. The outline follows drawing figure 2.
The 102K takes a maximum primary DC of 2.5 mA. DC resistance is 1585 ohms on the primary and 260 ohms on the secondary, +/- 15%. It is rated for 20 mW output with 1.5 dB insertion loss and a low frequency roll-off of 310 Hz at -1 dB. Peak working voltage is 100 V.
The 102K is RoHS and REACH compliant, with a shipping weight of 0.02 lbs (0.01 kg). Where cost matters more than a sealed body, the series literature refers to the open-type 148 and 149 series.
Ideal For
- High-impedance amplifier interstage coupling
- Balanced drive from a center-tapped secondary
- Sealed PCB audio assemblies
Overview
| Series | 102 Series Miniature Audio Epoxy Potted |
| Description | Audio transformer, potted, primary 10000 ohms, secondary 2000 ohms |
| Product Type | Audio transformer, potted |
| Short Description | AUDIO TX INTERSTAGE POTTED |
| Typical Application | Interstage |
Dimensions
| Drawing Figure | 2 |
Electrical
| Output Power | 20 mW |
| Insertion Loss | 1.5 dB |
| Peak Working Voltage | 100V |
| Max. Primary DC Current | 2.5 mA |
| Primary Nominal Impedance | 10000 ohms |
| Secondary Nominal Impedance | 2,000 CT ohms |
| Low Frequency Roll Off (-1 DB) | 310 Hz |
| Primary DC Resistance (+/- 15%) | 1585 ohms |
| Secondary DC Resistance (+/- 15%) | 260 ohms |
Identifiers
| UPC | 623980179506 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 0.02 lbs (0.01 kg) |
Construction & Finish
| Mounting | P.C. board mount |
| Pin Type | Square pin, 0.025 in square typical |
| Construction | Rugged black epoxy potted construction; completely sealed unit |
| Winding Technique | Bifilar winding on center tapped units for balanced resistive and capacitive characteristics |
| Unused Connections | If a connection is not used, no pin will exist |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What is the primary impedance of the 102K?▾
10000 ohms, feeding a 2000 ohm center-tapped secondary.
How much primary DC is allowed?▾
Up to 2.5 mA.
What are its DC resistances?▾
1585 ohms primary and 260 ohms secondary, +/- 15%.
What is its low-frequency roll-off?▾
-1 dB at 310 Hz.
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