RedPlate TweedyDrive Operations Guide
3
Drive Control
– Sets the amount of distortion by controlling the level between the 2 gain
stages of the section. Pull this control to shift into more gain and girth for the distortion.
Level Control
– Sets the output volume of the section. Higher settings are “bigger” and more 3
dimensional. Pull this control to engage a high frequency roll off.
MASTER SECTION
Presence Control
– The presence circuit uses global negative feedback to remove low
frequencies which frees up bandwidth for more midrange and highs. Think of it as a tone control to
balance the relationship between highs and lows, especially when the amplifier is naturally
producing increased low end at louder volumes. The control clicks off when rotated to zero for no
presence.
Master Volume
– This is an active control and actually adds gain at the higher settings. The
cleanest tones are achieved at settings below 7, at customer request a
“PULL LO MASTER”
feature can be added, which makes extreme low volumes easier to dial in.
Standby Switch
– This switch allows the tubes to warm up before operating the amplifier. Wait
1 minute after power on to move it up to the operate position. For improved tube life and
performance do not leave the amplifier in Standby position for longer than 20 minutes (better to just
leave it in operate mode during performance intermissions).
REAR PANEL SECTION
Domestic (USA):
Rear Panel Export:
IEC Module
– contains the main power switch, power cord inlet connector and the fuse drawer.
To access the fuse(s) use a small flat blade screwdriver in the notch at the side of the power cord
inlet connector, the drawer snaps out in a rearward direction. The TweedyDrive uses the smaller
European (5mm X 20mm) sized fuses. A time delay variety (SLO-BLO) is recommended
Voltage Selector-
(export version only) Rotate the selector switch for the proper VAC
selection. Make sure to use the correct fuse as noted on the rear panel.