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Summary of Contents for Fredenstein F660
- Page 1 F660 Limiting Amplifier Operating Manual...
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Page 2: Installation
T-type input attenuator, input transformer, Class A amplifier and finally an output transformer. At this point the similarities end. The F660 uses a DSP to control the operating points of the tubes, guarantying perfect working conditions all the time. The side chain amplifier is designed with semi-conductor components since it “only”... - 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.
- 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 F660 Manual Release 2.1 July 18, 2014 Page 3...
- Page 5 AC threshold. Bypass: If bypass is turned on, the main input and outputs are connected and the F660 is taken out of the signal pass. This is very useful for comparisons of the direct and compressed sounds.
- 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 F660 Manual Release 2.1 July 18, 2014 Page 5...
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Page 7: Utilities Sub Menu
Factory Default: The F660 can be reset to factory defaults. First select Factory default and then turn the rotary control to enable, then press the control to perform the reset to the factory defaults. DC Calibration: Executing the DC calibration by enabling the feature and then pressing the rotary control. -
Page 8: Specifications
110V to 120V in the 115V range or 220V to 240V in the 230V range (user selectable) Power Consumption: < 100W Dimension (LxHxD): 480mm x 135mm x 250mm Net Weight: 7.5kg Fredenstein F660 Manual Release 2.1 July 18, 2014 Page 7... - Page 9 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...
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