RedPlate CDS3 Operation Manual Download Page 2

RedPlate CDS3 Operations Guide 

 

Page 2 

© 

RedPlateAmps 2012 

 

 
 

CLEAN PREAMP SECTION 

 

 
The Clean Preamp is designed to imitate (and surpass) all of the “classic” guitar amp preamps. The CDS3 Mode  
control gives the player the ability to shift the midrange center point frequency. 
 

Bright Switch

 

– Center = OFF, Down = sound of new strings, Up = normal Bright response.  

 
Volume

 

– 

Typical setting is between 3 and 5 but experimentation is encouraged.  

 

Treble Control

 - 

Adjusts highs (also upper midrange when the Boost footswitch is engaged, see 

the  

Other Features

 section of this manual for details

). 

 

Middle Control

 

– 

Controls the amount of Midrange frequencies, somewhat interactive with the Bass Control. 

 

 

Bass Control

 

– Sets the amount of low end. Can be rotated to zero where it clicks off for a full tone stack lift. 

 

Mode Selector

 

– A six position rotary switch, it steps through 5 progressively fatter positions of the midrange  

center frequency and achieves maximum fat midrange by lifting the Middle control in position 6.

 

DRIVE SECTION 

 

 
The Drive section controls the amount of character to add to the 

Blackface channel’s tone. The section’s range  

of effect can be just a hint of early break up or a full on aggressive heavy metal distortion. 

Gain Control

 

–This control sets the amount of signal for the first gain stage of the section. Low settings are  

smoother and higher settings are more aggressive. When you rotate this control to zero it bypasses the  
overdrive section.   Overdrive will 

not

 engage when the Tweed channel is manually enabled on the front panel. 

Drive Control

 

– Sets the amount of distortion by controlling the level between the 2 gain stages of the section. 

 The interaction of the Gain and Drive controls affects the tone of the overdrive. 

Level Control

 

– Sets the output volume of the section. This control is shared with the Tweed Preamp.  

Pull this control to engage a high frequency roll off that only affects the overdrive tone. 
 

Summary of Contents for CDS3

Page 1: ...se take a moment and review this manual for an understanding of all the available features or just connect the footswitch put all the knobs at noon and play This manual applies to CDS3 models produced after 8 10 2012 Signal Path Block Diagram FRONT PANEL Input Jack Typical High impedance input to the amplifier Designed to be Pedal Friendly in the unlikely event you will ever use a pedal in front o...

Page 2: ...ely fatter positions of the midrange center frequency and achieves maximum fat midrange by lifting the Middle control in position 6 DRIVE SECTION The Drive section controls the amount of character to add to the Blackface channel s tone The section s range of effect can be just a hint of early break up or a full on aggressive heavy metal distortion Gain Control This control sets the amount of signa...

Page 3: ...don t have the footswitch connected Enabling the Tweed Channel from the panel disables the overdrive Tone Treble is emphasized at settings past 5 more bass at the lower numbers When pulled it shifts the preamp into Brown mode This tone control is lifted for a treble volume increase when the Boost Button is pressed on the footswitch see the Other Features section of this manual for details MASTER S...

Page 4: ...because it has a protection device ALWAYS HAVE A SPEAKER CONNECTED TO AVOID PERMANENT AMPLIFIER AND OUTPUT TUBE DAMAGE LINE OUT A line level signal jack derived from the speaker output which contains the whole tone of the amplifier SEND and RETURN Jacks The send jack connects to the input of an external effects device and the return jack connects to the output of an external effects device The sen...

Page 5: ...footswitch button does not work when the front panel Gain control is rotated to zero because it is a duplicate function Drive cannot be enabled if the front panel Tweed control is pulled POWER ON OFF PROCEDURE 1 Check the Standby switch to make sure it is toggled downward for Standby operation 2 Toggle the main power switch to the up position this switch is located at the edge of the IEC input mod...

Page 6: ...de screwdriver to adjust the bias pot for a reading of 72MV 5 MV FYI the plate voltage is 470 volts The reading is the sum of the idle current for both tubes 8 Recheck the reading after 10 minutes of operation and again after a week or two of operation INTERNAL TRIM POT The CDS3 has 1 internal trim pot for the PI Balance Useful for working with unmatched 12AX7 tubes in the phase inverter position ...

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