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Summary of Contents for Conrad-johnson design CT5
- Page 1 Conrad-Johnson Owner’s Manual CT5 Composite-Triode Preamplifier conrad-johnson It just sounds right.
- Page 2 Please take a few minutes to read the manual to better understand the features and capabilities of your CT5. Note that this unit is phase inverting. See the section entitled “Getting The Most From Your CT5" for details on correct hookup in your system.
- Page 3 Warranty For Conrad-Johnson Components Conrad-Johnson Design, Inc. will provide service under warranty to the original owner on products sold new in the United States for the lesser period of three years from the date of purchase by the origi- nal purchaser, or five years from the date of shipment to the au- thorized conrad-johnson dealer.
- Page 4 Be aware that requesting an estimate will delay service to your unit, as we will have to contact you for approval before commencing service. Registering The Warranty Please return the enclosed card to the factory within 30 days of purchase to register the warranty CT5 Owner’s Manual...
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Page 5: Electromagnetic Interference (Emi)
The first step in preparing your CT5 preamplifier for use is to install the vacuum-tubes. To do this, remove the top plate of the tube guard by removing the three socket-head screws using the sup- plied hex-head screwdriver. The CT5 uses two type 6N30P tubes. - Page 6 Physical location and cable “dress” can be an important factor in minimizing hum pickup. The installation should situate the pream- plifier well away from the power amplifier, and power (ac mains) cords should be dressed to remain at least 4" (100mm) away from input/output cables. CT5 Owner’s Manual...
- Page 7 20k ohms or higher. Since the CT5 inverts phase, it may be neces- sary to invert the speaker leads to maintain correct absolute phase. See the section on “Getting the most out of your CT5" for an ex- planation. TRIGGER OUTPUT: When the CT5 is switched on, these termi- nals provide a constant dc voltage that can be sensed by the “trig-...
- Page 8 When first connected to ac mains, or after an interruption of power, the CT5 will turn on in a default mode (after auto-muting), with the level set at 20, and the CD input selected. In subsequent sessions, as long as the ac mains has not suffered a power outage, the unit will turn on at the last used volume setting and input.
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Page 9: Remote Control
When THEATER is selected, the level will be set and locked to unity gain. Remote Control All operations of the CT5 can be controlled by the wireless remote unit. MUTE: Pressing the mute button will cause the main outputs to mute and the level display to be zero. - Page 10 We know of no vacuum tubes available which will improve the sonic performance of your CT5. The tubes in your preamplifier have been tempered by a controlled...
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Page 11: Absolute Phase
This will be the case if the number of phase inver- sions is even (or zero). The CT5 is phase inverting. If your system has an odd number of inversions, (for example, if the CT5 is the only phase inverting unit in the chain) then you must add one phase inversion. - Page 12 The warm up period can be expected to last about fifteen minutes. Questions: If you have questions about the installation or function of your CT5 do not hesitate to call Customer Service at (703) 698- 8581. CT5 Owner’s Manual...
- Page 13 Net Weight: 31 lb net Fuses The CT5 has two power transformers (one for the tube circuitry, one for the control circuits), each of which is protected by a fuse. These fuses (F1 and F2) are l o cated on the main pc board at the back of the chassis near the transformers.
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