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Summary of Contents for Margules U280-SC
- Page 1 Amplifier U280-SC anniversary...
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Page 2: Important Safety Instructions
AC power source follow them as instructed. Retain the safety and operating immediately and contact Margules Audio for further instructions for future reference. instructions. ATTACHMENTS:... -
Page 3: Important Safety Note
17. IMPORTANT SAFETY NOTE: 12. LIGHTNING: For added protection during a lightning • Before connecting a new product such as the U280-SC storm or when the component is idle for long periods of to your audio or home theater system, turn off all other... -
Page 4: Fcc Information For User
• AC Fuse: The fuse is located inside the modifications not expressly approved chassis and is not user serviceable. If the by Margules Audio could void the user's authority to unit does not power up, contact operate the equipment. - Page 5 • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from where the receiver is connected. OUTDOOR ANTENNA INSTALLATION/SAFE ANTENNA AND CABLE CONNECTION: • If an outside antenna or cable system is connected to the equipment, be sure the antenna or cable system is grounded in order to provide protection against built-up static charges and voltage surges.
- Page 6 Start with a Active Servo Bias (patent pending). The bias actively single amp and then add a second U280-SC for tracks the input signal, permitting full class-A output, increased power—or to convert to triode operation at the without overdriving the tubes.
- Page 7 2 Ohms should not be used Zero Feedback 4 Ohms from 2 to 4 ohms load The U280-SC does not use negative feedback as do 8 Ohms from 4 to up ohms load most tube amplifiers. Negative feedback results in a loss of detail and sound richness.
- Page 8 are overdriving the tubes; around 120ma, coincides with the maximum power. It is not important if you overdrive the tube in short periods, but if you do it continuously, it will shorten the life expectancy of the tubes. To change the tubes just unplug the A.C.
- Page 9 Break-in Troubleshooting The break in period is about 150 hours of music Doesn’t turn on reproduction. Look for: Tube life expectancy - Proper connection to the wall outlet. For optimal performance we recommend to change the -The rear switch to be in on position. set off tubes every two years, although they should last a -The U280 SC has a 3-minute delay pre warm up time.
- Page 10 Noise in your system. Check for ground loops in the system. WARNING No more than one physical ground should have the Electrical hazard! Misuse or system. failure to follow instructions properly may result in personal Advises injury or death! Always mount your amplifier in a firm platform avoiding external vibrations from loudspeakers.
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Page 11: Limited Warranty
1. Damage, deterioration, malfunction or failure to meet performance specifications resulting from: This warranty extends to products purchased directly from Margules Audio or an authorized Margules Audio a. Accident, acts of nature, misuse, abuse, neglect dealer. Purchasers should inquire of the dealer regarding or unauthorized product modifications the nature and extent of the dealer’s warranty, if any. - Page 12 Mexico or at 707-5811830 in USA and ask for technical support. Or visit Margules Audio at the address in the end of this manual with your product. If you want to send it the cost is on your account.
- Page 13 MARGULES AUDIO Uruapan #17-4 Col. Roma Mexico D.F. 06700 Mexico. Tel. (525)514 7448 Toll free 1-888-538 8605 FAX (525)533 4654 Email: info@margules.com.mx MARGULES USA 820 Elm Drive/div. PetalumaCA, 94952 Phone number: 707-5811830 Collect USA & Canada: 1-888-538 8605 Fax number: 707-5811830 Visit our home page in internet: http://www.margules.com...
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