¼" Preamplifiers Types 26AA, AB, AC, AL, AN, 26HG and 26TC

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Home > Products > Preamplifiers > ¼" Preamplifiers > ¼" Preamplifiers Types 26AA, -AB, -AC, -AL, -AN, -HG, and TC

Type 26AA, for Intensity Measurements Preamplifier with 30 cm lightweight cable terminating in a 4-pin LEMO 0B connector. Intended for use with G.R.A.S. Sound Intensity Probes, in which case they are also available in matched pairs under the name: Type 26AA Set. Download Product Data: pd_26AA_ver_04_Feb_2010.PDF	Related Products: Type 26AS Types 26CB & 26CC Adobe Acrobat reader is required for viewing data sheets.
Type 26AC, General-purpose General-purpose preamplifier with an integrated 3-m lightweight cable terminating in a 7-pin LEMO connector. A ¼" to ½" adapter, GR0010, is included, so that it can also be used with G.R.A.S. ½" microphones. Download Product Data: pd_26AC_ver_04_Feb_2010.PDF
Type 26AL, Built-in SysCheck General-purpose preamplifier with an integrated 3 metre lightweight cable terminating in a 7-pin LEMO connector. Includes built-in SysCheck facility for enabling easy system checks to be made. A ¼" to ½" adapter, GR0010, is included, so that it can also be used with G.R.A.S. ½" microphones. Download Product Data: pd_26AL_ver_04_Feb_2010.PDF
Type 26HG, Infra-sound Similar to Type 26AC but with 40 GOhm input impedance to enable low-level noise measurements at very low frequencies (infra-sound). Used in the Low-noise level microphone system Type 40HT Download Product Data: pd_26HG_ver_25_June_09.PDF
Type 26AB, General-purpose General-purpose preamplifier with an integrated 7-pin LEMO connector. A ¼" to ½" adapter, AF0008, is included, so that it can also be used with G.R.AS. ½" microphones. Cable not included. Download Product Data: pd_26AB_ver_02 Dec 10
Type 26AN, Insert-voltage Preamplifier with an integrated 7-pin LEMO connector. Configured to permit use of the insert-voltage technique for determining the open-circuit sensitivity of a microphone. A ¼" to ½" adapter, GR0010, is included, so that it can also be used with G.R.A.S. ½" microphones. Cable not included. Download Product Data: pd_26AN_ver_12_June_09.PDF
Type 26TC, built-in TEDS Preamplifier with an integrated 3 metre lightweight cable terminating in a 7-pin LEMO connector. Includes built-in TEDS^* chip which enables it to be programmed with calibration data as a complete unit together with a microphone. A ¼" to ½" adapter, GR0010, is included, so that it can also be used with G.R.A.S. ½" microphones. Download Product Data: pd_26TC_ver_ 12_05_09.PDF
^* Transducer Electronic Data Sheet according to IEEE-1451.4 ^** Constant-Current Power Supply

Specifications Types 26A+ Series, 26TC and 26HG
Frequency range:	2 Hz - 200 kHz (±0.2 dB)
Input impedance:	0.4 pF, 20 G Ohm 0.4 pF, 40 G Ohm (26HG)
Output impedance:	(typical) 55 Ohm
Output connector:	4/7-pin LEMO male
Power supply, Single:	28 V, 0.7 mA to 120 V, 2.5 mA
and Dual:	±14 V, 0.7 mA to ±60 V, 2.5 mA
Noise: A-weighted and:	< 2.5 µV (typically 1.8 µV) rms < 2.3 µV (typically 1.5 µV) rms (26HG)
linear (20 Hz - 20 kHz):	< 6 µV (typically 3.5 µV) rms < 5.7 µV (typically 3.2 µV) rms (26HG)
Gain:	–0.25 dB (typical)
Operating temperature:	–30 °C to + 70 °C
Storage temperature:	–40 °C to + 85 °C
Dimensions and weight 26AA, 26AC, 26AL, 26HG and 26TC (ex. cable):	diameter: 6.35 mm (¼") length: 43 mm weight: 8 g
Dimensions and weight 26AB and 26AN:	diameter: 12 mm (0.47") length: 67.6 mm weight: 22 g

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Updated 12. august 2011

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