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26CB 1/4" CCP Standard Preamplifier for Microphone with Microdot Connector
26CB 1/4" CCP Standard Preamplifier for Microphone with Microdot Connector
The GRAS 26CB 1/4" CCP Standard Preamplifier with Microdot Connector is a general-purpose preamplifier optimized for use with prepolarized condenser microphones. It is a small, robust unit and uses a GRAS CCP power supply, e.g., GRAS 12AL. It has a very low inherent noise level, a large dynamic range, and a frequency response from below 2 Hz to above 200 kHz.
Its small ceramic thick-film substrate has a very high input impedance and is shielded by a guard ring to minimize the influence of stray capacitance and microphonic interference.The GRAS 26CB is delivered with a built-in TEDS chip and can be programmed as a single unit with a microphone fitted.
The diameter is 6.35 mm (1/4"), length 44 mm and weight 19 g (0.67 oz)
Key Specifications
| Frequency range (±0.2 dB) with 18 pF microphone dummy | 2.5 Hz to 200 kHz |
| Slew rate | 20 V/µs |
| Input impedance | 20 // 0.4 GΩ // pF |
| Output impedance | < 50 Ω |
| Output Voltage Swing, min. @ 24-28 V CCP voltage supply | 8 Vp |
| Noise (A-Weighted) max. | 2.5 µV |
| Noise (A-Weighted) typ. | 1.8 µV |
| Noise (Linear 20 Hz – 20 kHz) max. | 6 µV |
| Noise (Linear 20 Hz – 20 kHz) typ. | 3.5 µV |
| Gain | -0.35 dB |
| Power supply (Constant Current Power) | 2 to 20 (typ. 4) mA |
| DC bias voltage, typ. | 12 V |
| Temperature range, operation | -30 to 70 °C / -22 to 158 °F |
| Temperature range, storage | -40 to 85 °C / -40 to 185 °F |
| Humidity range non condensing | 0 - 95 % RH |
| TEDS (IEEE 1451.4) | 769 v. 0.9 |
| Connector type | Microdot 10/32 |
| Weight | 7 g / 0.25 oz |
Specifications from the official GRAS product sheet. Please refer to the attached datasheet for full details.
