The final revision made no changes to the circuitry, only the cosmetics and the layout. The 1176SA from Universal Audio, is a small interface that is used to calibrate two mono 1176s for stereo operation.The 1176SA was first offered for the original 1176, but has become increasingly difficult to find for use with either vintage or new 1176s. All the revisions to follow would maintain the same controls, but the red power light would disappear when the black faceplate was introduced. The newly reissued 1176 operates in exactly the same way as a good, working vintage 1176. The rest of the design features two black plastic control knobs with silver tops and clear plastic collars, two smaller black and silver knobs, eight black plastic pushbuttons and a red power indicator light. The new Universal Audio 1176LN reissue is based on the D and E revisions and comes as close as you can get to 'the sound of 67' without a time machine. The output matching transformer at 600 ohms was a UA-5002 (later improved to UA5002A) with a split secondary, a tertiary winding for negative feedback to the final line output circuit, and a separate emitter winding.Ĭovering up all this electronic wizardry was a brushed aluminum faceplate with blue paint around the Weston meter. The output amp circuit was similar to the preamp, but followed by a 2N3053 bipolar transistor operating in Class A. The original 1968 design by Bill Putnam used an input transformer at the industry standard 600 ohms resistance (Peerless, later UTC), a T-pad resistive attenuator to drop the input voltage, a FET acting as a voltage variable resistor to control gain, followed by a bipolar transistor as a preamp (the famous 1108 circuit with a Darlington pair). For 50 years the 1176 has been a vital tool in music production revered for its fast compression/release and warm tone that. Digital Adapters & Miscellaneous Cables.