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Summary of Contents for Fredenstein F660A
- Page 1 F660A Limiting Amplifier Operating Manual...
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Page 2: Installation
Overview: The Fredenstein F660A Limiting Amplifier is a valve (tube) based compressor and limiter with the same very short signal path as the famous Fairchild 660/670. it uses the exact type of tubes, the 6386 LGP, as the Fairchild. Fortunately, new production tubes are available today, since original tubes are hardly available anymore. - Page 3 To turn the F660 on, please push the rotary control. The F660 will power up and go through a tube calibration cycle. During this cycle you will see the anode currents in both halves of the push-pull Class A amplifier. Fredenstein F660A Manual Release 1.0 Oct 17, 2014 Page 2...
- Page 4 The cursor will move from the left to the right and the rotary control becomes the level “pot”. The change is applied immediately, therefore the engineer can hear the changes right away. When Fredenstein F660A Manual Release 1.0 Oct 17, 2014 Page 3...
- Page 5 Inserting a high-pass filter between the side chain output and input can be used to avoid compression in unwanted frequency ranges. An example is using a high pass filter to form an de- esser. Fredenstein F660A Manual Release 1.0 Oct 17, 2014 Page 4...
- Page 6 The peak hold time can be selected between 0s, 2.5s and indefinitely. In the 0s setting no peak hold is performed and in the indefinitely setting the user has to manually reset the hold value by selecting a different hold time. Fredenstein F660A Manual Release 1.0 Oct 17, 2014 Page 5...
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Page 7: Utilities Sub Menu
DC Calibration: Executing the DC calibration by enabling the feature and then pressing the rotary control. Audio bypass will be applied during calibration. Fredenstein F660A Manual Release 1.0 Oct 17, 2014 Page 6... - Page 8 Side Chain function. Release: Changes the input gain in exactly the same way as through the menu system, the secondary function, if the control is pushed, is toggling the LINK function. Fredenstein F660A Manual Release 1.0 Oct 17, 2014 Page 7...
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Page 9: Specifications
Net Weight: 7.5kg Contact Info: Fredenstein Professional Audio by Orion Communication 7F-1, No. 582, Ruei Guang Rd. Neihu District Taipei 114 Taiwan Phone : + 886-2-2657-2618 Email : info@fredenstein.com www.fredenstein.com Fredenstein F660A Manual Release 1.0 Oct 17, 2014 Page 8... - Page 10 Fredenstein F660A Manual Release 1.0 Oct 17, 2014 Page 9...
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