Technical Description, con’t
problems electrically. By developing electronic circuits the meters are made to respond to short intervals with an accu- racy of 95%! To permit the eye to see such high speed mo- tion, the electronic circuits that drive the meter pointer are time stretched. Special logarithmic circuitry allows the meter to indicate a 60dB plus range, without resorting to a Meter Range Switch.
Power Supply Circuits
To compliment the design of the C500, there are two indentical fully regulated power supplies, one for each chan- nel. The C500 Contoller contains both low and high voltage regulated power supplies for each channel. It also supplies the appropriate voltages to meet the different requirements of the C500 Preamplifier and C500 Tube Preamplifier. The special “R” core transformers, one for each channel, supply the necessary voltage/current for the low and high voltage regulated circuitry and are housed in shielded enclosures. Refer to figure 104.
Figure 104
Most owners desire one power switch for the whole au- dio system. The C500 Controller is equipped with circuits providing remote Power Control On/Off signals to McIn- tosh Source Components and Power Amplifiers. When the C500C is switched On, a digital “1” (+5V) signal changes the operational state of digital control circuitry and a DC voltage is sent to the Power Control Main Jacks. There are also special Power Control Jacks (Triggers and Passthru) and together with options in SETUP allow for the customiz- ing of the Power Control Control Signals In for specific functions.
Block Diagrams
Refer to folded sheet “Mc2B” for the C500 Controller and C500 Preamplifier Block Diagrams.
36
