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CAUTION

THE PREAMPLIFIER AND POWER SUPPLY CONTAIN POTENTIALLY LETHAL VOLTAGES, AND
TUBES THAT BECOME HOT IN USE.

NEVER OPERATE THE PREAMPLIFIER OR POWER SUPPLY WITH THE COVERS REMOVED. 

DO NOT REMOVE THE CHASSIS COVERS EXCEPT TO CHANGE TUBES OR LIGHT BULBS.

BEFORE OPENING A CHASSIS TO CHANGE TUBES OR LAMPS, DISCONNECT THE POWER
SUPPLY  FROM  AC  POWER  AND  THE  AUDIO  CHASSIS  FROM  ALL  OTHER  COMPONENTS.
ALLOW IT TO SIT TURNED OFF FOR 30 MINUTES BEFORE REMOVING THE COVER. REPLACE
COVER AND SECURELY ATTACH BEFORE RECONNECTING AND OPERATING

DO NOT OPERATE THE UNITS IF THEY ARE WET.

VACUUM TUBES BECOME 

HOT

 ENOUGH TO CAUSE SERIOUS BURNS. NEVER TOUCH A TUBE

WHEN THE UNIT IS ON. IT MAY TAKE SEVERAL MINUTES FOR THE TUBES TO COOL DOWN
AFTER THE UNIT IS SWITCHED OFF. IT IS STRONGLY RECOMMENDED THAT THE TUBE COVERS
BE LEFT IN PLACE AT ALL TIMES.

THE AMPLIFIER AND POWER SUPPLY ARE

 HEAVY

. IT IS ADVISABLE TO HAVE ASSISTANCE IN

UNPACKING, MOVING, AND SETTING UP. BE SURE TO USE PROPER LIFTING TECHNIQUES TO
AVOID BACK STRAIN AND INJURY. BE CERTAIN TO INSTALL IT IN A SECURE LOCATION FROM
WHICH IT CAN NOT FALL OR TIP OVER.

CONTENTS

Introduction
Installation
Inputs (back panel)
Outputs & Grounding Switch (back panel)
Operation
Fuses
Front Panel Controls
Remote Control
Replacement of Tubes
Care of Chassis
A Word About Tubes In General / Locating a Defective Tube
Warranty / Registration Form

Summary of Contents for Phi Beta Triode

Page 1: ...F The VAC Phi Beta Triode Preamplifier Operation Maintenance Information Valve Amplification Company Manual issued 02 15 2008...

Page 2: ...TUBES BECOME HOT ENOUGH TO CAUSE SERIOUS BURNS NEVER TOUCH A TUBE WHEN THE UNIT IS ON IT MAY TAKE SEVERAL MINUTES FOR THE TUBES TO COOL DOWN AFTER THE UNIT IS SWITCHED OFF IT IS STRONGLY RECOMMENDED T...

Page 3: ...ssible optimizing performance into either balanced or single ended loads and allowing ground loops to be broken The optional phono stage uses triode tubes operating without loop feedback Gain is moder...

Page 4: ...the connections used IMPORTANT READ THE SECTION ON OUTPUTS GROUNDING SWITCH 7 Output to a recording device tape recorder CD recorder etc may be obtained from the TAPE OUT jacks The adjacent switch for...

Page 5: ...y and be aware that different power cords can alter the sound The power supply s backlit meters show variation in power line voltage as reflected to the audio circuitry 12 12 volt triggers are provide...

Page 6: ...f using the tape outputs the TAPE OUT switch must be set to ON Two phono inputs are provided for MC and MM cartridges The ground lead from the turntable should be connected to the binding post located...

Page 7: ...sound may be different This is also normal for high resolution audio equipment Optimum sound should return after a few hours of operation preferably with an audio signal Note that although your VAC S...

Page 8: ...llumination In the VARIABLE mode the Phi functions as a conventional preamplifier The SET mode allows the control of volume to be determined entirely by the source component This is useful when the Ph...

Page 9: ...2 may be connected in the same system so that in essence there are two phono inputs selectable from the front panel Selector This switch selects between IN1 through IN6 and the PHONO inputs Rotate cou...

Page 10: ...wand is powered by two AAA batteries These should be of the alkaline type You will need to install them in the wand before using the remote Since batteries can leak they should be removed from the wan...

Page 11: ...s in the socket and pins of the tubes taking care to make sure that pin pattern corresponds to holes in tube socket Replace the cover before reconnecting and operating the preamplifier In the event th...

Page 12: ...if the manufacturer you prefer is rare you may want to purchase a few spare tubes for the future How long should tubes last It has long been known in professional circles and probably now forgotten th...

Page 13: ...ished in a durable black powder coat paint while the fascias are hand rubbed acrylic lacquer The lacquer should be treated in much the same fashion as a high quality automotive finish Never apply any...

Page 14: ...______________________________ ________________________________________________________________________ Telephone _______ _______ _____________ e mail __________________________________ Dealer name __...

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