Conrad-Johnson LP70S Manuale d'uso - Pagina 5

Sfoglia online o scarica il pdf Manuale d'uso per Amplificatore Conrad-Johnson LP70S. Conrad-Johnson LP70S 12. Vacuum-tube amplifier

nstallation

As is the case with any vacuum-tube power amplifier, the LP70S

dissipates a significant amount of heat. Provision must be made for

adequate ventilation. Mount the unit on a flat, hard surface, taking

care that the ventilation holes in the bottom are unobstructed.

Maintain at least four inches of clearance above the unit, and at

least three inches on the sides. The cabinet or shelf should be

open at both front and back. For more restricted installations, cool-

ing fans are essential.

All LP70Ss sold in the United States are configured for operation

on a 60Hz ac power line producing between 108 and 126 volts.

Export versions of the LP70S will have the correct operating volt-

age and frequency clearly marked on the back panel of the unit,

near the ac power cord. In all cases, the actual line voltage should

be within + 5/- 10% of the nominal rated voltage.

Electromagnetic Interference (EMI)

Considerable care has been taken in the design of the LP70S to

minimize its susceptibility to radio frequency interference and other

forms of EMI. Choice of materials, physical layout, grounding prac-

tice, and power supply design have all been specified with a view

to reducing the impact of electromagnetic fields on the perform-

ance of this unit. At the same time, however, our primary goal is

the accurate reproduction of recorded music in the normal home

environment, and we have elected not to compromise this objec-

tive by the application of heavy-handed RFI filters, or by using

grounding practices that reduce RFI at the expense of degraded

audio performance. We find that the approach we have taken has

worked extremely well, resulting in only rare instances of EMI prob-

lems which could be treated locally as needed, rather than com-

promising the performance of our product in the 99.9% of installa-

tions where EMI is not a problem.

Care in installation can often avoid EMI induced problems. The fol-

lowing practices should generally be observed in any application,

and will be especially important where EMI may be a problem.

Interconnect cables should be kept as short as possible (3 meters

or less), and shielded cable should be used (cable which has two

center conductors, and a separate external shield connected at

only one end).

LP70S Owner's Manual