andrews Para-Dyne 20 Operation Manual page 7

Head and combo
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9. MASTER VOLUME CONTROL –
adjust the loudness of the amp when using the lead channel. Try setting it a little
louder than the clean channel and switching to the lead channel for solos. For
practicing at low volume, the control is designed to maintain a great overdrive tone
when turned down. See additional notes below.
10.
STANDBY SWITCH –
When turning on the amp, make sure the STANDBY switch is in the off (down)
position. Turn on the POWER (up position) switch first. The pilot light will light up.
Wait at least one minute to allow time for the tubes to warm up completely before
turning on the STANDBY switch. After the tubes are warmed up, turn on the
STANDBY switch (UP position) to operate the amp. It is a good idea to turn the
STANDBY switch off when not using the amp for more than a few minutes. This
will quiet the amp and stop the plate current from flowing in the tubes, resulting in
longer tube life.
11.
POWER SWITCH
Always turn off the POWER switch when not using the amp for several hours or
more.
12.
PILOT LIGHT
bulb replacement, simply unscrew the red lens, grab the bulb with your fingers,
push in while turning counterclockwise and release. Replace with a standard #47
bulb. The lens thread fits many standard lamp lenses and "jewels" allowing you to
customize the color if you desire.
Adjustment suggestions –
Try adjusting the tone controls on the overdrive channel first. After achieving
your desired settings, switch to the clean channel. Use the BRIGHT and
DEPTH switches to balance the lows and highs with the overdrive channel
depending on your guitar, effects and volume settings.
When playing the amp at high volume, for example when the MASTER
VOLUME is turned up high or when the clean volume is turned up high, a richer
sound is achieved with more apparent bass. It is normal for the tone controls to
be a bit less responsive in this state since additional harmonics are created in
the output stage after the tone controls. The TRIODE/PENTODE switch on the
rear panel can be used to drive the output tubes at slightly less volume.
This switch turns on the high voltage for the tubes.
– This switch turns on the main power to the amplifier.
– This light indicates when the main power is turned on. For
Use the MASTER VOLUME control to
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