Oldfield 6750 User Manual Download Page 5

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CAUTION:

By nature vacuum tubes get very hot during operation. Do not touch vacuum tubes until

they have sufficiently cooled.

Oldfield amplifiers are capable of producing very high sound pressure levels which may cause

temporary or permanent hearing damage. Use care when setting and adjusting volume levels during
use.

Failure to comply with any of these safety precautions could result in damage to the amplifier and in

worst cases bodily harm. Non-compliance with any safety precaution may void any stated warranties.

Summary of Contents for 6750

Page 1: ...1 Oldfield Amplifiers User Guide 6750 6750 JC 67100 67100 JC...

Page 2: ...ampli fi er is built to provide you with the best tonal experience and durability available in a guitar ampli fi er As with all Old fi eld s it is hand built with you the player as the central focus o...

Page 3: ...3 Table Of Contents Important Safety Instructions 4 5 Overview 6 Panel Controls And Features 7 9 Tube Layout 10 Foot Switch Controller 11 Operation Notes 12 13 Warranty 14...

Page 4: ...a three prong grounded plug This is a safety feature If you are unable to insert the plug into the outlet contact an electrician to replace your obsolete outlet Do not defeat the safety purpose of thi...

Page 5: ...f producing very high sound pressure levels which may cause temporary or permanent hearing damage Use care when setting and adjusting volume levels during use Failure to comply with any of these safet...

Page 6: ...l as a more modern high gain tone depending on set up The ampli fi er features two channels Bright And Normal full tone stack master volume the ability to bridge channels a mid boost function and a ha...

Page 7: ...aracteristics of each channel contribute to the overall ampli fi er tone The instrument must be plugged into the normal channel jack in order for channel bridging to work 5 Bight Channel Volume This c...

Page 8: ...y and edge The amp must be in Standby mode before changing the position of this switch 18 Bias Adjust Control This control allows either the end user or a quali fi ed technician to set the idle curren...

Page 9: ...Out The Line Out jack supplies an unbalanced signal identical to what is being sent to the speakers Speakers must remain connected when using this jack 27 Foot Switch Jack Connect the supplied foot sw...

Page 10: ...A7 67100 4 x EL34 67100 JC 4x 6CA7 Replace only with a high quality matched sets of power tubes A re bias will be necessary when replacing power tubes Phase Inverter Replace with any high quality low...

Page 11: ...fi er panel switch must be engaged in order for the foot switch to work 2 Mid Selector Stomp the Mid foot switch to engage the ampli fi er s mid boost function When the mid boost function is engaged...

Page 12: ...es British invasion tone run the pre amp gains low and the master high For a more modern distortion tone run the pre amp gains high and the master low Tone Controls Start with the controls all at the...

Page 13: ...il you get the right amount of effect you want before using the presence You may fi nd that no presence is needed with certain edge control settings When turning up the presence concentrate on the eff...

Page 14: ...e Power Transformer Output Transformer And Choke These items are guaranteed for one year after date of purchase against manufacturer s defects If a failure occurs due a defect in manufacturing Old fi...