Hammond 834A Interstage Audio Transformer, 5K/20K:10K/40K Ohm
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Create Free Business AccountKey Features
- Interstage transformer: 5K/20K ohm primary to 10K/40K ohm secondary
- Max. primary D.C. unbalanced current: 0 mA
- +15 dBm maximum power level; +/- 0.5 dB from 50 Hz to 15 kHz
- Deep-drawn tin plated steel case with two 6-32 mounting studs and hardware
- Wire leads, 4" minimum length; 1.75" W x 1.25" D x 2.56" H max
- Humbucking construction with balanced split windings
- RoHS and REACH compliant
The 834A is an 800A Series broadcast-quality interstage audio transformer for coupling amplifier stages. It has a nominal 5K/20K ohm primary and a 10K/40K ohm secondary. The series ordering table lists its ratio as 1:1.4, while the part page describes it as Interstage (ratio 1:4), so confirm the ratio against your design; the impedances are consistent across both sources.
The maximum primary D.C. unbalanced current is listed as 0, so the primary is not intended to carry unbalanced D.C. Frequency response is +/- 0.5 dB max. from 50 Hz to 15 kHz, insertion loss is approximately 1 dB, and the maximum power level is +15 dBm with the specified characteristics, or higher with reduced low frequency performance.
Humbucking construction helps reject stray magnetic fields, and balanced split windings on both primary and secondary give circuit versatility; the primary may be used as the secondary and vice versa for impedance matching.
It is housed in a deep-drawn steel case with a tin plated finish and fastens with two 6-32 mounting studs, supplied with hardware. Connections are made by wire leads of at least 4" in length. Maximum overall dimensions are 1.75" (44.5 mm) wide x 1.25" (31.8 mm) deep x 2.56" (65 mm) high. The 834A is RoHS and REACH compliant. Its listed shipping weight is 0.5 lbs (0.23 kg), and it is identified by UNSPSC 39121301.
Ideal For
- Interstage coupling between amplifier stages
- Tube amplifier interstage
- Step-up between gain stages
- Broadcast audio amplifiers
Overview
| Series | 800A Series (Audio Broadcast Quality) |
| Application | Interstage (ratio 1:1.4 per series table; 1:4 per part page) |
| Product Type | Audio transformer, broadcast quality, with wire leads |
| Short Description | AUDIO TX B-CAST W/ LEADS |
Dimensions
| Overall Dimensions (Max) | 1.75" (44.5 mm) wide x 1.25" (31.8 mm) deep x 2.56" (65 mm) high |
Electrical
| Impedance Note | Below nominal impedance, power capability is lower and the frequency spectrum shifts downward; at higher impedances both shift upward |
| Frequency Response | +/- 0.5 dB max. from 50 Hz to 15 kHz |
| Maximum Power Level | +15 dBm with specified characteristics (higher levels with reduced low frequency performance) |
| Primary Nominal Impedance | 5K/20K ohms |
| Secondary Nominal Impedance | 10K/40K ohms |
| Max. Primary DC Unbalanced Current | 0 mA |
Identifiers
| UPC | 623980607184 |
| UNSPSC | 39121301 |
| Part Number | 834A |
Packaging & Shipping
| Shipping Weight | 0.5 lbs (0.23 kg) |
| Series Shipping Weight (Spec Sheet) | 0.5 lb. (0.2 kg) |
Construction & Finish
| Case | Deep-drawn steel case, tin plated finish |
| Leads | Wire leads, minimum length 4" |
| Mounting | Two 6-32 mounting studs with hardware |
| Windings | Balanced split windings on primary & secondary; primary may be used as secondary and vice versa for impedance matching |
| Construction | Humbucking |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What ratio is the 834A?▾
The series ordering table lists it as interstage, ratio 1:1.4; the part page lists ratio 1:4. Its impedances are 5K/20K ohm primary and 10K/40K ohm secondary.
Can the 834A primary carry DC?▾
The maximum primary D.C. unbalanced current is listed as 0 mA.
How is the 834A mounted?▾
The 834A has a deep-drawn tin plated steel case with two 6-32 mounting studs, and the mounting hardware is included. Connections are by wire leads with a minimum length of 4".
What is the frequency response of the 834A?▾
Frequency response is +/- 0.5 dB max. from 50 Hz to 15 kHz with approximately 1 dB insertion loss, at up to +15 dBm with the specified characteristics.
What are the dimensions of the 834A?▾
Overall dimensions are 1.75" (44.5 mm) wide x 1.25" (31.8 mm) deep x 2.56" (65 mm) high max.
Is the 834A RoHS compliant?▾
Yes. The 834A is listed as RoHS compliant and REACH compliant.
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