Hammond 808A Mic or Mixer to Grid Audio Transformer, 50/200 Ohm
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Create Free Business AccountKey Features
- Mic or mixer to single or push-pull grid: 50/200 ohm to 10000/40000 ohm
- Max. primary D.C. unbalanced current: 0.6 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
- Electrostatic shield between primary and secondary
- RoHS and REACH compliant
The 808A is an 800A Series broadcast-quality audio transformer that steps a microphone or mixer output up to a single or push-pull (P.P.) grid input. The primary is a nominal 50/200 ohms and the secondary 10000/40000 ohms, a high step-up for tube input stages, including balanced push-pull designs.
The primary accepts a maximum D.C. unbalanced current of 0.6 mA. 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. An electrostatic shield sits between the primary and secondary windings. The split secondary is what allows it to drive either a single grid or a push-pull pair.
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 808A is RoHS and REACH compliant. Its listed shipping weight is 0.57 lbs (0.26 kg), and it is identified by UNSPSC 39121301.
Ideal For
- Microphone to tube grid input
- Mixer output to single or push-pull grid
- Tube preamplifier input stages
- Broadcast console input circuits
Overview
| Series | 800A Series (Audio Broadcast Quality) |
| Application | MIC or Mixer to Single or P.P. Grid |
| 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 | *50/200 ohms (* electrostatic shield between primary & secondary) |
| Secondary Nominal Impedance | 10000/40000 ohms |
| Max. Primary DC Unbalanced Current | 0.6 mA |
Identifiers
| UPC | 623980607139 |
| UNSPSC | 39121301 |
| Part Number | 808A |
Packaging & Shipping
| Shipping Weight | 0.57 lbs (0.26 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 |
| Electrostatic Shield | Between primary & secondary |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
Can the 808A drive a push-pull grid?▾
Yes. Its listed application is mic or mixer to single or P.P. (push-pull) grid.
What impedances does the 808A have?▾
A nominal 50/200 ohm primary and a 10000/40000 ohm secondary.
How is the 808A mounted?▾
The 808A 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 808A?▾
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 808A?▾
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 808A RoHS compliant?▾
Yes. The 808A is listed as RoHS compliant and REACH compliant.
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