T+A p10 User Manual

T+A p10 User Manual Manual pdf 31 page image

Protective circuitThe P10 is fitted with a micro-processor controlledprotective circuit which constantly monitors all sections ofthe amplifier during its entire period of operation.The protective circuit ensures that the valves are heatedgently, thereby extending the useful life of thesecomponents.Since valves have a natural ageing tendency, theprocessor keeps track of the elapsed operating time ofthese components. After 5000 hours of operation werecommend that you ask your specialist B dealer tocheck the valves. When this operating time has elapsed,the processor alerts you by displaying the message' > 5000 h ' during the valve heating phase.Useful information about valvesValves are electronic components which offer superbsound qualities, but they do require a certain level of caredue to their construction. This is primarily a factor of thedelicate mechanical nature of the components. Valvesare fitted with a heating filament which has a finite usefullife, similar to the filament in an incandescent light bulb.In the P10 a micro-processor controls the heating of thevalves and ensures that this process is as gentle aspossible, and that they are always protected fromoverloading. The operating voltages supplied to thevalves are electronically stabilised, so that fluctuations inthe mains supply voltage have no adverse effect on thevalves.The amplifier’s specially developed shock-absorbing feetdamp out mechanical shock and vibration.All these design features make the P10 extremelyreliable, and are your guarantee that the amplifier willgive long, problem-free service.However, although the machine incorporates sophisti-cated protective systems, you as user can also play apart in obtaining the best possible sound and lifeexpectancy from your valves.Please note the following points in this respect:• Avoid switching the amplifier on and off frequently.- For brief breaks in listening (less than5 … 10 minutes) switch the amplifier to the HVsetting.- For longer breaks in listening (up to 2 hours) movethe main switch to the HEAT setting.• Avoid subjecting the amplifier to severe mechanicalshocks.• Allow the amplifier to cool off for at least an hour beforemoving it.31