Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for Bob Carver VTA20S
Summary of Contents for Bob Carver VTA20S
- Page 1 VTA20S 20 Watt Stereo Amplifier OWNERS MANUAL...
-
Page 2: Safe Operating Conditions
This manual provides general, ongoing use and safety information for the VTA20S Stereo Amplifier also known at the Black Magic 20 Stereo Amplifier. GENERAL The Black Magic 20 stereo amplifier is the perfect blend of form and function and the ideal choice for serious music listeners. -
Page 3: Circuit Description
CIRCUIT DESCRIPTION The input stage of these amplifiers consists of a 12AX7 current sourced, long-tailed balanced pair direct coupled to the complimentary pair of EL84M tubes. An internal DC restorer ensures that the bias volt- age remains correct over the entire audio signal cycle. Each set of output tubes are arranged in a push pull configuration. -
Page 4: Rear Panel Connections
REAR PANEL CONNECTIONS POWER SWITCH Up is on, down is off. There is no power-on indicator except for the glow of the tubes; you will have to remember whether you turned it on until you can see the tubes glow. It is safe to switch the amplifier on and off at will. - Page 5 COOLING Convection cooling - Cool air is drawn from under the chassis by the heat from the tubes acting as an air pump, and exhausting the warm air out the chassis through the side vents. Do not place the amplifier on a carpet or in a closed cabinet.
- Page 6 Black Magic 20 Amplifier Specifications Number of Line Inputs Input Impedance 100K Ohms Input Stage 12AX7 current sourced low noise valve Automatic DC Restoration Nominal Voltage Gain 26dB (into 8 ohms) Output Stage Configuration 1 Complementary set of EL84M’s per channel Regulated Screen Supply Voltage 340V Output Tube Plate Voltage...
-
Page 7: Important Safety Information
Servicing — Do not attempt to service these amplifiers yourself, as opening or removing the bottom cover WILL expose you to dangerous high voltages. Refer all servicing to Bob Carver LLC. Damage Requiring Service — These Amplifiers should be serviced by Bob Carver LLC when:... - Page 8 CAUTION: - Changes or modifications not expressly approved by BOB CARVER LLC will void the manufacturer’s warranty. Page 7...
- Page 9 WARRANTIES: Bob Carver LLC warrants that all equipment manufactured by us to be free from defects in materials and workmanship for seven (7) years (vacuum tubes – one (1) year). This warranty shall not apply: (a) to equipment not manufactured by Bob Carver LLC...
Need help?
Do you have a question about the VTA20S and is the answer not in the manual?
Questions and answers