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RedPlate Black-n-Blues Operations Guide 

 

 

TWEED PREAMP 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 imitate the headroom and mid scoop of more traditional Treble Middle Bass style amps 

when needed. 

 

Volume Switch

 

– Pulls for Bright, this control sets the overall volume of the Tweed channel.  

 
Gain

 

– Pulls to make the Tweed channel the active channel (handy when you don’t have the 

footswitch connected) This control s

ets the “sweet spot” – adjust this for the amount of break up 

character you desire in your tone.

 Typical setting is between 3 and 5 but experimentation is 

encouraged. 

 

Tone

 

– Treble is emphasized at settings past 5, more bass at the lower numbers. When rotated 

to zero it clicks off for a full tone lift. The tone lift can also be accessed instantly via the Boost 
button on the footswitch (see the 

Other Features

 section of this manual for details). 

 

Mode Selector

 

– A six position rotary switch, it steps through 6 progressively fatter positions of 

midrange and girth. The fattest Tweed setting is position 6. 

 

DRIVE SECTION 

 

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

tone. The section’s 

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

Summary of Contents for Black-n-Blues

Page 1: ...ew this manual for an understanding of all the available features or just put all the knobs at noon and play This Manual applies to Black n Blues models produced after 03 01 2011 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 of the Black n Blues CLEAN PREAMP SECTI...

Page 2: ... intensity of the Mid Boost this topic is covered in the Other Features Section of this manual Treble Control Adjusts highs also upper midrange when the Tweed Boost is engaged Middle Control Controls the amount of Midrange frequencies somewhat interactive with the Bass Control Pulls to enable Deep which scoops some midrange frequencies and emphasizes Bass makes your electric sound more like an aco...

Page 3: ...ets the sweet spot adjust this for the amount of break up character you desire in your tone Typical setting is between 3 and 5 but experimentation is encouraged Tone Treble is emphasized at settings past 5 more bass at the lower numbers When rotated to zero it clicks off for a full tone lift The tone lift can also be accessed instantly via the Boost button on the footswitch see the Other Features ...

Page 4: ...ttings are bigger and more 3 dimensional Newer versions may have a HI CUT feature when pulled 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 ...

Page 5: ...ait 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 45 WATT 18 WATT Switch 45 watt model only In 45 watt position the inside pair of tubes is running fixed bias while the outside pair is running in ca...

Page 6: ...ootswitch connection If a replacement cable is needed make sure all 5 wires are supported The pinout is conveniently located on the rear panel for use with automated switcher conversion boxes SMOOTH Switch Employs local negative feedback in the clean preamp for a hint of compression Humbucker Single coil Switch Sets the amount of bass gain in the input of the clean preamp stage useful for matching...

Page 7: ...ive and the when the Tweed channel s tone control is rotated to zero because it is a duplicate function MID Optional footswitch only Midrange Boost feature When engaged the size of the treble capacitor is increased to allow for more upper midrange at the same time it does a lift of the midrange control for maximum midrange The effect can be lessened by pulling the front panel Volume control which ...

Page 8: ...er TUBE CHART 45 Watt TUBE CHART 100 Watt All tube brands are acceptable a long plate is preferred in the V5 Phase Inverter position Warning No user serviceable parts inside so unless you know what you re doing please refer to a qualified service person only BIAS PROCEDURE 45 Watt Model w 4 6V6 tubes 1 When new 6V6 GT output tubes are installed it is important to re bias the amp for optimal perfor...

Page 9: ...st point hole red tip jack and touch or clip the black meter lead on one of the metal output tube retainer clips 8 Use a small flat blade screwdriver to adjust the bias pot for a reading of 80MV 5 MV FYI the plate voltage is 380 volts The reading is the sum of the idle current for both tubes 9 Recheck the reading after 10 minutes of operation and again after a week or two of operation BIAS PROCEDU...

Page 10: ...omponents in your amplifier are warranted for a period of 3 years Exclusions are vacuum tubes reverb tanks cables speakers and cosmetics which are warranted for 30 days Improper handling or product misuse or product abuse or unauthorized repair work or unauthorized modifications may nullify your warranty Eligibility for coverage and covered items are at the sole discretion of RedPlateAmps RedPlate...

Page 11: ...RedPlate Black n Blues Operations Guide 11 ...

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