ETMC Technologies :: G.R.A.S. Sound & Vibration :: Type 12AL - Constant Current Power (CCP) Supply: 1 channel, covers frequency range from 1Hz to 200kHz and has a switchable A-weighting network and overload indicator. It is powered either by two internal batteries (LR6-AA) or by an external 3 – 6 V DC supply.

<H1>No Frames? No Problem!</H1> <p><br>Go to G.R.A.S. Sound & Vibration web site with <A HREF="http://www.gras.dk/00012/00054/00089/00090/">no-frames</A>.</p> <p>The Type 12AL is a low-noise CCP* Supply for powering microphone preamplifiers requiring a constant-current power supply, e.g. G.R.A.S. Preamplifiers Type 26CB (¼") and Type 26CA (½"). It can also power the G.R.A.S. Probe Microphone Type 40SC as well as all G.R.A.S. Array Microphones. <p>The Type 12AL covers the frequency range from 1Hz to 200kHz and has a switchable A-weighting network and overload indicator. It is powered either by two internal batteries (LR6-AA) or by an external 3 – 6 V DC supply. <p><p>* Constant Current Power. <p><p>Specifications Type 12AL <p>Input channel: BNC socket <p>Output channel: BNC socket <p>Transducer supply current: 4 mA sourced from 28 V <p>Frequency response: 1 Hz - 200 kHz <p>A-weighting network: IEC 60651 Type 0 <p>Power supply: 2 × AA alkaline batteries or 3 - 6 V DC <p>Weight: 110 g 160 g (with batteries)