RedPlate CDS3 Operation Manual Download Page 3

RedPlate CDS3 Operations Guide 

 

Page 3 

© 

RedPlateAmps 2012 

 

 

TWEED SECTION 

 

 

 

 
The Tweed Preamp is based on the classic Tweed Style design with two important differences: 
1. 

Gets into the “sweet spot” at various volume levels for consistency of tone and character in both small and 

 large venue sizes.  
2. Can also imitate the soft breakup and rounded midrange of the Brownface era amplifiers. 

Level

 

– This control sets the overall volume of the Tweed channel, its function is shared with the overdrive section. 

Tweed

 

–This control sets the “sweet spot” – adjust this for the amount of break up character you desire in your tone.

  

Typical setting is between 5 and 8 but experimentation is encouraged.

 Pulls to enable the Tweed channel (handy  

when you 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 SECTION 

  

 

Master Volume

 

– This is an active control and actually adds gain at the higher settings. The cleanest tones  

are achieved at settings below 7. 

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. 
 
 
 

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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