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Description
Urei BL-40 Modulimiter (Vintage)
Late 1970’s Vintage mono compressor originally designed for mono AM broadcast use. The unit utilized a LA3A style Opto circuit as well as a 1176 FET style compressor that can both be used and metered simultaneously as well as the output. The unit tests perfectly and has been recapped. It sounds heightened and incredibly cool unlike anything we have heard. The tone is shimmery like the silver-face 1176’s tend to be with the advantage of multiple combinations of compression. This is a blast to play with. We will include our 90 day warranty with the purchase.
3 separate meters for:
RMS limiting (Opto)
Peak limiting
Output level.
Controls are behind the security panel and adjustable with a flathead screwdriver and include:
Input Level, Output Level, Output Meter Calibration, Peak Limiting, Assymetrical Peak Limiting, Limit Bypass Switch, and Power Switch.
600 ohms, bridged-T input control. Floating, transformer isolated.
Designed to work into 600 ohm load. Output transformer isolated.
600 ohms, unbalanced, 10 dB below rnain output.
-30 dBm to +25 dBm for 5dB limiting.
+27 dBm.
10 dB below output level.
70 dB with all controls at maximum.
+0, -0.8 dB from 30 Hz to 15 kHz.
Less than 0.5% THD, 30 Hz to 15 kHz at +24 dBm output.
(With 5 dB RMS, 5 dB peak limiting) Less than 3% THD at +24 dBm output.
Better than 70 dB at threshold of RMS lim iting. Equivalent input noise less than -110 dBm.
Signal dependent; 1 millisecond to 50 milliseconds for 63% correction.
5 microseconds for 10 dB limiting.
RELEASE TIME: Signal dependent; 50 milliseconds (RMS SECTION) to 2 seconds for 63% return,
depending on duration of compression. (PEAK SECTION) 100 milliseconds.
Senses positive-negative imbalance and automatically changes signal polarity to guarantee maximum positive modulation.
Front panel green-red LED indicates state of phase optimizer.
3 separate meters for: RMS limiting
Peak limiting Output level.
100-120 V AC, 50-60 Hz, 10 w, or 220-240 V AC, 50-60 Hz, 10 W.
Range of ambient temperatures, from 0°C to +50°C (+32°F to 122°F).
Capable of operating in strong rf fields. (Field tested 150 feet from 50 kW array.)
Clear anodized brushed aluminum front panel . Cadmium plated steel chassis.
19″ x 3-1/2″ rack panel. Depth behind panel 8″ (483 x 89 x 203 mm).
(Net) 11 pounds (5.0 kg). (Shipping) 16 pounds (7.25 kg).
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