Retro Instruments 176 Manual de usuario Pagina 1

Retro Instruments, Inc. User’s Manual 176 Tube Limiting Amplifier

2.5 Stereo Link An RCA jack on the rear panel allows strapping of multiple 176 limiters. An optional stereo link panel is available to couple two u

Section 3 Operation 3.1 Power Switch, Indicators and Interlock Upon initial installation, apply power. The red indicator and meter should ligh

the various ratio settings when doing approximately 10 dB of gain reduction, however at less amounts of gain reduction the lower ratio settings will s

3.8 Meter Select Switch The Meter Select switch provides metering of the Input and Output levels and the Gain Reduction. The Input and Output meters

Section 4 Principles of Operation 4.1 Amplifier Circuit Board 4.1.1 Input Transformer Stage The Input from the Female XLR Input connector feeds

4.1.6 Asymmetry Switch The asymmetry switch raises the bias and threshold of the negative or positive side of the detector depending on the position

4.3.4 0B2 Gas Discharge Tube The 0B2 is a cold-cathode, glow discharge tube. In combination with a 10K Ohm resistor it provides a regulated 108 Vol

Section 5 Alignment and Maintenance Balance Test Switch VR1 VR2

Adjust VR3 for minimum indication on the VU meter. Sometimes this will not be a full dip. Only an extremely matched 6BC8 will dip fully. Set Balance

squeal or make other space-like sounds. Mostly, they will make sound when you tap them. A healthy tube may make a tink or bonk sound or nothing at a

Retro Instruments, Inc. 176 Tube Limiting Amplifier User’s Manual 2008 Retro Instruments, Inc. P.O. Box 5066 Mo

Section 6 Schematics and Drawings 6.1 Board Layouts and Schematics

Section 7 Support and Service Retro Instruments provides all levels of support and service for your product. 7.1 Service The Product Warranty ou

7.4 Warranty Retro Instruments products are warranted to be free of all defects in material and workmanship for one year from the date of purchase.

7.5 Factory Service Instructions To obtain factory service, complete this page and include it with the unit. Name _______________________________

Manual Revisions Revision Print Date Initial Release December 29, 2008 Notices 2008 Retro Instruments, Inc. All rights reser

Contents Section 1 Description 1.1 Your Limiter 1.2 Applications 1.3 Specifications 1.4 Safety Considerations Section 2 Installation 2.1 Operat

4.1.9 Test Facilities 4.2 Power Supply Circuit Board 4.2.1 Mains Input 4.2.2 Power Transformer 4.2.3 5Y3 High Voltage Rectifier 4.2.4 OB2 Gas Di

Section 1 Description This section provides a general description of the 176 Tube Limiting Amplifier. Please review this information before instal

1.5 Safety Considerations The Retro 176 is to be used in a metal equipment rack with adequate ventilation. The vacuum tubes become hot. The AC main

Section 2 Installation 2.1 Operating Environment Mount the 176 in a standard 19” equipment rack. Always install the bottom rack screws first to s

2.2.3 Line Cord You can use a compatible IEC power cable for 100-120 Volts or 200-240 Volts per your country’s specification. USA Europe