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アンプ Conrad-Johnson LP125saのPDF オーナーズマニュアルをオンラインで閲覧またはダウンロードできます。Conrad-Johnson LP125sa 12 ページ。 Vacuum-tube stereo amplifier

nstallation

As is the case with any vacuum-tube power amplifier, the LP125sa

amplifier 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, cooling fans are essential.

All LP125sa amplifiers 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 LP125sa will have the correct

operating voltage 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 LP125sa to

minimize its susceptibility to radio frequency interference and other

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

practice, and power supply design have all been specified with a

view to reducing the impact of electromagnetic fields on the

performance 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

objective 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

problems which could be treated locally as needed, rather than

compromising the performance of our product in the 99.9% of

installations where EMI is not a problem.

Care in installation can often avoid EMI induced problems. The

following

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

LP125sa Owner's Manual