Hammond 850EA Sealed 50/200 Ohm Mic to Line Audio Transformer
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Create Free Business AccountKey Features
- Emitter or mic to line: 50/200 ohm primary to 150/600 ohm secondary
- Nominal winding resistance 27 ohms primary / 68 ohms secondary (+/- 20%)
- +/- 0.5 dB from 20 Hz to 20 kHz; +15 dBm max power level
- Sealed, tin plated deep-drawn steel case with two 6-32 studs and hardware
- Electrostatic shield between windings on the green lead; humbucking construction
- Balanced split windings, reversible primary/secondary for impedance matching
- RoHS and REACH compliant
The 850EA is a sealed 850A Series broadcast-quality audio transformer that steps an emitter output or microphone up to a line. Its nominal 50/200 ohm primary feeds a 150/600 ohm secondary, suiting typical low-impedance microphones and emitter-follower outputs. Nominal winding resistance is 27 ohms primary and 68 ohms secondary (+/- 20%).
Across the series, frequency response is +/- 0.5 dB max. from 20 Hz to 20 kHz, insertion loss is approximately 1 dB, maximum power level is +15 dBm with the specified characteristics, and distortion is approximately 1.5% at 20 Hz under full power. The sealed case and internally wax potted core are intended for stable characteristics and long life.
An electrostatic shield between primary and secondary is connected to the green lead. Humbucking construction and balanced split windings on both sides add circuit versatility, and the primary may be used as the secondary and vice versa for impedance matching.
The case is deep-drawn steel with a tin plated finish, sealed, and fitted with two 6-32 mounting studs; mounting hardware is included. Leads are a minimum of 4" long. The listed overall dimensions are A 1.20 in (30 mm), B 1.70 in (43 mm), C 1.65 in (42 mm) and D 1.32 in (34 mm). The 850EA is RoHS and REACH compliant, with a listed shipping weight of 0.4 lbs (0.18 kg) and UNSPSC 39121301.
Ideal For
- Microphone to 600 ohm line
- Emitter output to line
- Broadcast audio interfaces
- Studio signal chains
Overview
| Series | 850A Series (Audio Broadcast Quality, Sealed) |
| Application | Emitter or MIC to Line |
| Product Type | Audio transformer, broadcast quality, sealed, with wire leads |
| Short Description | AUDIO TX B-CAST W/ LEADS |
Dimensions
| Dimension A | 1.20 in (30 mm) |
| Dimension B | 1.70 in (43 mm) |
| Dimension C | 1.65 in (42 mm) |
| Dimension D | 1.32 in (34 mm) |
Electrical
| Distortion (Series) | Approx. 1.5% @ 20 Hz under full power |
| Maximum Power Level | +15 dBm with specified characteristics (higher levels with reduced low frequency performance) |
| Primary Nominal Impedance | 50/200 ohms |
| Primary Nominal Resistance | 27 ohms +/- 20% |
| Frequency Response (Series) | +/- 0.5 dB max. from 20 Hz to 20 kHz (units over 5K ohms impedance may be down 1 dB @ 20 kHz) |
| Secondary Nominal Impedance | 150/600 ohms |
| Secondary Nominal Resistance | 68 ohms +/- 20% |
Identifiers
| UPC | 623980036991 |
| UNSPSC | 39121301 |
| Part Number | 850EA |
Packaging & Shipping
| Shipping Weight | 0.4 lbs (0.18 kg) |
| Series Shipping Weight (Spec Sheet) | 0.4 lb. (0.18 kg) |
Construction & Finish
| Case | Deep-drawn steel case, tin plated finish, sealed |
| Core | Wax potted core internally (series sheet) |
| Leads | Minimum 4" lead length |
| Mounting | Two 6-32 mounting studs; mounting hardware included |
| Windings | Balanced split windings on primary & secondary; primary may be used as secondary and vice versa for impedance matching |
| Construction | Humbucking |
| Electrostatic Shield | Between primary & secondary, connected to the green lead |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What impedances does the 850EA have?▾
A nominal 50/200 ohm primary and a 150/600 ohm secondary.
How does the 850EA differ from the 850CA?▾
Both are emitter or mic to line units with a 150/600 ohm secondary; the 850EA has a 50/200 ohm primary where the 850CA has 12/48 ohms.
Is the 850EA sealed?▾
Yes. The 850EA is in a sealed, tin plated deep-drawn steel case.
How is the 850EA mounted?▾
It has two 6-32 mounting studs, and mounting hardware is included. Leads are a minimum of 4" long.
Which lead is the shield on the 850EA?▾
The electrostatic shield between primary and secondary is connected to the green lead.
Is the 850EA RoHS and REACH compliant?▾
Yes, it is listed as both RoHS compliant and REACH compliant.
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