GRAS 26CB-HT 1/4″ CCP Standard Preamplifier with Microdot Connector

Freq range: 2.5 Hz - 200 kHz
Noise: 1.8 µV Gain: -0.35 dB
Special feature: High temperatures

The GRAS 1/4″ preamplifier 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.

Technology

Typical applications and use

  • CCP inputs
  • Prepolarized microphones
  • 1/2"-inch precision microphones
  • High levels and high frequencies

Design

Its small ceramic thick-film substrate has a very high input impedance and is shielded by a guardring to minimize the influence of stray capacitance and microphonic interference.The GRAS 26CB-HT 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 8g (0.3oz)

It can be used with all prepolarized microphones, such as GRAS 40BE and 40BD 1/4" microphone and GRAS 40AE, 40AD, and 40AQ 1/2" microphones using the included GRAS GR0010 Adapter for 1/4" preamplifier and 1/2" microphone. It has an integrated Microdot output connector. The casing is made of stainless steel for maximum strength and durability.

Specifications

Frequency range (±0.2 dB) with 18 pF microphone dummy
Hz
2.5 to 200 k
Slew rate
V/µs
20
Input impedance
GΩ // pF
20 // 0.4
Output impedance
Ω
< 50
Output Voltage Swing, min. @ 24-28 V CCP voltage supply
Vp
8
Noise (A-Weighted) max.
µV
2.5
Noise (A-Weighted) typ.
µV
1.8
Noise (Linear 20 Hz – 20 kHz) max.
µV
6
Noise (Linear 20 Hz – 20 kHz) typ.
µV
3.5
Gain
dB
-0.35
Power supply (Constant Current Power)
mA
2 to 20 (typ. 4)
DC bias voltage, typ.
V
12
Temperature range, operation
°C / °F
-30 to 120 / -22 to 248
Temperature range, storage
°C / °F
-40 to 85 / -40 to 185
Humidity range non condensing
% RH
0 - 95
TEDS (IEEE 1451.4)
769 v. 0.9
Connector type
Microdot 10/32
CE/RoHS compliant/WEEE registered
Yes / Yes, Yes
Weight
g / oz
8.0 / 0.28

Conditions: 23 °C Ambient temperature, 4 mA / 24 V open loop CCP voltage, 18 pF dummy microphone, 3 m output coax-cable.


GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

Dimensions

Ordering info

Included items

GR0010

Adapter for 1/4" preamplifier and 1/2" microphone

Optional items

GRAS AA0018

3 m Microdot - BNC Cable, High Temp

GRAS AA0064

3 m Microdot - Microdot Cable, High Temp

GRAS AL0029

1/4" Microphone Holder, POM
GRAS AL0013

1/4" Microphone Holder, Stainless Steel

GRAS AL0005

Swivel head

GRAS AL0006

 Tripod
GRAS RA0063

Adapter for 1/8" microphone and 1/4" preamplifier
GRAS RA0006

Right-angled (90º) Adapter for 1/4" Microphone and 1/4" Preamplifier

GRAS RA0080

6pF Preamplifier-input adapter for 1/4" microphones

GRAS 12AL

1-Channel CCP Power Module with A-weighting filter

GRAS 12AQ

2-Channel Universal Power Module with signal conditioning and PC interface

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.