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Factory Settings:  6V6GC

For amplifiers equipped with JJ 6V6GC power tubes, the chart below shows factory bias setting as 
well as the bias performance of each rectifier scenario (solid state, GZ34 tube or 5U4GB tube).  You 
can safely switch between SS Rectifier Mode and Tube Rectifier Mode.  You may also swap out the 
GZ34 rectifier tube with the 5U4GB tube - all without having to adjust the bias.

Power Tube Biasing:  Factory Settings

Power Tube

Rectifier ~Plate 

Voltage

~Bias

(milliamps)

Wattage @ Idle/

Dissipation

Safety Range

JJ Electronics E34L

SS Rectifier

428V

38.0

31W (61%)

Average (Factory)

JJ Electronics E34L

GZ34 Tube

403V

42.0

32W (64%)

Average (Factory)

JJ Electronics E34L 5U4GB Tube

382V

29.3

21.2W (42%)

Brown (Factory)

Power Tube

Rectifier ~Plate 

Voltage

~Bias

(milliamps)

Wattage @ Idle/

Dissipation

Safety Range

JJ Electronics 6V6GC SS Rectifier

442V

19.3

16W (57%)

Average (Factory)

JJ Electronics 6V6GC GZ34 Tube

423V

23.9

18.4W (68%)

Med. Hot (Factory)

JJ Electronics 6V6GC 5U4GB Tube

404V

18.2

13.8W (49%)

Brown/Cool (Factory)

Factory Settings:  E34L 

Your amplifier ships with the bias settings optimized for maximum flexibility and safety.  During QC 
and final testing, the bias is set maximum safe power dissipation (approximately 60% of a given 
tube’s performance rating).  For each type of power tube, you can safely switch between SS and Tube 
Rectifier.

For amplifiers equipped with JJ E34L power tubes, the chart below shows factory bias setting as well 
as the bias performance of each rectifier scenario (solid state, GZ34 tube or 5U4GB tube).  You can 
safely switch between SS Rectifier Mode and Tube Rectifier Mode.  You may also swap out the GZ34 
rectifier tube with the 5U4GB tube - all without having to adjust the bias. 

Summary of Contents for Kitchen Sink 6VEL

Page 1: ...U S E R S G U I D E G U I T A R A M P L I F I E R KITCHEN SINK 6VEL ...

Page 2: ...ation by placing objects on top of the amplifier which extend past the rear edge of its cabinet WARNING Do not expose the amplifier to rain moisture dripping or splashing water Do not place objects filled with liquids on or nearby the amplifier WARNING Always make certain proper load is connected before operating the amplifier Failure to do so could pose a shock hazard and may result in damage to ...

Page 3: ...ncluded Limited Lifetime Warranty Foot switchable Hybrid MASTER Bypass boost function Create custom volume level presets perfect for setting up a rhythm and lead volume scene changes and recalling them via foot switch Options Standard packages come with a 2 button foot switch Pro and Deluxe packages come with a 4 button foot switch A Break out box is available separately in order to bring the amp ...

Page 4: ...e rectified mode In the DOWN position the amplifier is operating in tube rectified mode Hybrid MASTER Control 3 The MAIN control is always active and sets the absolute volume ceiling The foot switchable HM bypass control will be covered later in the manual HybridMASTER is a patented by 3rd Power Push Control 4 The global PUSH control affects both channels and allows you to adjust the low frequency...

Page 5: ...verb effect to both channels up position or clean channel only down position Front Panel Reverb Level and Assignment 6 7 Input Jack 8 The INPUT jack is where you connect instrument level signals Channel Selector Switch 9 The middle position selects the Clean channel The left position selects the Dirty channel The right position places the amplifier in Foot Switch mode and allows remote channel cha...

Page 6: ... the high frequencies Big edgy overdrive tones when pushed The BIG Knob 12 The BIG Knob allows you to select or blend the preamp voicing of your tone When rotated fully clock wise you will hear American tones when rotated fully counter clock wise you will hear the distinct chime of a mid 60 s British AC tones All other knob positions are available to you to explore and create your own unique blend...

Page 7: ...of the circuit These diodes are preset to create an excellent compression effect as well as overall tightness and response More aggressive faster playing styles double picking sweep picking will appreciate the Gain setting This feature can also be assigned to the Foot switch Bus and remote controlled by foot switch NOTE This circuit has been enhanced to allow for clean guitar tones by simply rolli...

Page 8: ...ting from different tone stack circuits to help capture the tone and feel of different rock guitar eras JTM Classic bassman or 65 plexi JTM EQ curve The mids are scooped giving way to an exciting emphasis of low and high frequencies This is often referenced as a smooth tone JMP Classic 68 plexi super lead EQ curve The mids are punchy and woody with that classic growl you d expect from this style o...

Page 9: ...if your power tubes are bad to protect the circuit from being damaged SAFETY NOTES Always plug your amp into a properly grounded 3 prong AC outlet Never plug your amp into an ungrounded outlet Never remove or break off the 3rd prong safety ground pin from the power cord Never use a damaged or ungrounded power cord Always use the proper value and type fuse according to the rear panel markings Never...

Page 10: ...OUTPUTS are wired in parallel They are provided for connecting your amplifier to a single 4 OHM or two 8 OHM speaker cabinets SAFETY NOTES Never operate your amplifier without a connected speaker cabinet This will damage your tubes or transformers or both Always operate your amplifier with the proper impedance output that matches your speaker cabinet s In all cases always use a good quality heavy ...

Page 11: ...ing the full detail of every tone crafting decision you ve made within the amplifier However the output transformer can transmit audio signals that go far beyond what is useable for pleasing guitar tone Fortunately most guitar speakers roll off the harsh higher frequencies that exist beyond 5 8 kHz The Kitchen Sink 6VEL features a pleasing circuit that replicates the type of high frequency roll of...

Page 12: ...ERATION NOTES Signal levels at the FX SEND jack are a nominal 10dBV just under 1V p p matching the levels most vintage and modern effect pedals want to see The FX RETURN path brings your signal back into the amplifier with a tremendous amount of headroom accepting signals as low as 10dBV and as high as 4dBU before the onset of compression It can also be a gig saver too If your pedal board ever goe...

Page 13: ...n Pro foot switch ships with the Base 20 and 40 package It s designed to give you complex scene changes at the press of a button Button one is assigned to toggle between the Chl 1 and 2 Button 2 is for the Foot Switch Bus giving you control over whichever feature or combination of features you assign to it 4 Button Pro Foot Switch The 4 Button Pro ships with the Pro and Deluxe package It gives you...

Page 14: ...y turn the Bypass control to zero fully counter clockwise When setting up this feature start with the Bypass control on zero Dial in the perfect rhythm volume via the Hybrid Master control start with a setting of 11 o clock and then engage the HM Bypass feature on the foot switch Slowly turn the HM Bypass control clockwise until the perfect lead volume is achieved Now you can toggle back and forth...

Page 15: ...nnected to a one ohm resistor on the output tube cathode of V9 the power tube on the right When monitoring the current here you will be reading millivolts on your portable multimeter You will need to connect your positive test lead typically red to this terminal GND Terminal 34 This terminal is internally connected to chassis ground When monitoring the current of either output tube you will need t...

Page 16: ...e current your amp must be turned on and operating at idle no audio signal being fed into the input or the FX loop return Make sure that your speaker is plugged in Attach the negative test lead from your multimeter to the GND terminal black on the back panel of the amp One at a time attach the red positive test lead from your multimeter to either V8 or V9 terminals red and note the reading on your...

Page 17: ...J 6V6GC power tubes and a JJ 5U4 rectifier tube You may swap out the 5U4GB with a GZ34 rectifier tube WITHOUT re biasing your amp You can safely operate in SS or Tube Rectifier Mode as selected via the Standby Switch Pro and Deluxe amplifiers are equipped at the factory with JJ E34L power tubes and a JJ GZ34 rectifier tube unless an alternate tube complement has been specified by the customer or d...

Page 18: ... Plexi type amplifier up to 80 dissipation and then bringing the operating voltage down to 90VAC on a variable AC power supply often called a variac This does a few things Lowers DC operation voltage throughout the amplifier Lowers the heater supply starving the tubes of heater current limiting their efficiency Lowers the perceived loudness of the amplifier Modifies the performance and increases t...

Page 19: ...e tubes available on the market Under no circumstances should you open your amplifier and attempt to modify the circuitry in order to increase operating range Attempting to do so will potentially expose you to very dangerous high voltage electricity that can kill you DO NOT ATTEMPT TO DO THIS YOURSELF Tube Replacement THE SAFEST WAY TO CHANGE YOUR TUBES WOULD BE TO TAKE YOUR AMPLIFIER TO A QUALIFI...

Page 20: ...ge Bias milliamps Wattage Idle Dissipation Safety Range JJ Electronics 6V6GC SS Rectifier 442V 19 3 16W 57 Average Factory JJ Electronics 6V6GC GZ34 Tube 423V 23 9 18 4W 68 Med Hot Factory JJ Electronics 6V6GC 5U4GB Tube 404V 18 2 13 8W 49 Brown Cool Factory Factory Settings E34L Your amplifier ships with the bias settings optimized for maximum flexibility and safety During QC and final testing th...

Page 21: ...er WARNING Intentionally operating your amplifier out of range will limit or terminate your lifetime warranty Tube Type Rectifier Type Plate Voltage Bias milliamps Dissipation Safety Range JJ Electronics E34L SS Rectifier 428V 38 0 61 Average Factory JJ Electronics E34L SS Rectifier 433V 29 2 50 Cool JJ Electronics E34L SS Rectifier 423V 41 4 70 Hot max safe JJ Electronics E34L GZ34 Tube 403V 42 0...

Page 22: ...ell as your amplifier WARNING Intentionally operating your amplifier out of range will limit or terminate your lifetime warranty Tube Type Rectifier Plate Voltage Bias milliamps Dissipation Safety Range JJ Electronics 6V6GC SS Rectifier 442V 19 3 57 Average Factory JJ Electronics 6V6GC SS Rectifier 444V 17 50 Cool JJ Electronics 6V6GC SS Rectifier 436V 23 7 70 Hot max safe JJ Electronics 6V6GC GZ3...

Page 23: ... separate 1 4 TS jack for connecting to your external switching system WARNING Whichever remote foot switching system you use with the Break out Box it must feature isolated ground connection The Kitchen Sink 6VEL foot switching system cannot share an electrical ground with any other device Care should be used when placing your Break out Box with other devices on a pedal board or metal tray so as ...

Page 24: ...ny case the risk of loss or damage in transit is borne by the purchaser The RA number must appear in large print directly below the shipping address Always include a brief description of the defect along with your correct return address and telephone number When calling to inquire about a returned product always refer to the RA number If 3RD POWER determines that the unit was defective in material...

Page 25: ...3RD POWER Amplification LLC 1307 Jewel Street Nashville TN 37207 Phone 615 945 3393 Web Site www 3rdPower com Sunday August 23 2020 ...

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