Measurement Microphone Preamplifiers
In our facilities we have some different preamplifiers for measurement microphones. Typical frequency range covers from ~2Hz to 200kHz with linear 0 dB gain response. Normally the preamplifiers require some kind of powersupply - either as "built-in" from analyzer, measuring amp, front-end, or as a external powersupply
This means that you'll need, as absolute minimum, a powersupply if you'll use measurement microphones with standard audio-soundcards.
We have different types of preamplifiers available - some with older B&K 7 pin connector, and newer types equipped with standardized 7 pin LEMO connectors. Some types require 120/28Vdc powersupply from analyzer/frontend and a 200Vdc for polarization of microphones - NOTE: prepolarized microphones should NOT have 200V applied.
We also have a number of ICP-powered preamplifiers, and they'll need to use prepolarized microphones since polarisation is not available on this type.
Microphone Preamplifiers available in lab.facilities
- B&K 2619 1/2" - preamplifier 7pin B&K connector
- B&K 2623 1/2" - preamplifier w. microdot connectors
- B&K 2639 1/2" - preamplifier 7pin B&K connector
- B&K 264x 1/2" - preamplifier 7pin B&K connector mounted in B&K 4128 HATS
- B&K 2660 1" - (primarly used for low-noisemeasurements) preamplifier 7pin B&K connector
- B&K 2669 1/2" - preamplifier 7pin Lemo connector
- Gras 26AK 1/2" - preamplifier 7pin Lemo connector
- Gras 26CC 1/4" - preamplifier SMB connector (icp-power)
- some older B&K available on request
Work allways in progress - page will be updated !
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