Operation - Decware TORIIJR Owner's Manual

T O R I I J R
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OPERATION

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Your TORII JR ships with matched quads of EL34 output tubes. If you ordered your
amplifier with stepped attenuators instead of standard volume controls, it is
recommended that you run matched input tubes to maintain perfect channel balance.
All TORII JR's ship with carefully matched input tubes.
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As you can see, configuring your amplifier with stepped attenuators can complicate
tube replacement since all the tubes need to be more carefully matched. Again, the
reason for this it to maintain perfect channel balance. The exception would be if you
are running a preamplifier with either dual volume controls or a balance control, in
which case that can be used to match the channels even when the tubes on the left
side of the amp do not perfectly match the tubes on the right side of the amplifier.
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That said, once it is tubed up the sequence of start up is:
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1) Turn down left and right volume controls all the way.
2) Make sure loudspeakers are connected to the amplifier on both channels.
3) Turn on the power switch and wait for tubes to warm up.
4) Press Play, or lower the tonearm ; )
5) Slowly raise the volume on each channel to the desired listening levels.
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OA3 REGULATION
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You will notice that the OA3 regulator tubes will flicker on and off intermittently during
the first 30 seconds of warm up. This is because in order to make an OA3 "fire up" a
certain amount of current must be drawn across it. When you first turn on your
amplifier, the tubes are cold and are not conducting any current. Then as the input
tubes warm up and begin to draw current, electrons begin to flow inside the OA3.
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Understanding that the amount of current draw determines how the OA3 behaves, you
might also find it informative that the brightness of the glow is determined by the
current draw. Too little current, dim glow or possibly even flickering on and off. To
much current, bright glow and lots of heat created. Just right is a nice yellow/orange
glow with a temperature that you can keep you hand on for as long as you want.
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You will notice when you turn the amplifier off that the OA3's may flicker on and off a
few times as well, doing basically the reverse of when you turned the amplifier on. This
is normal.
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Decware High Fidelity Engineering Co., East Peoria IL, USA www.decware.com
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