VAC Phi 220 Spécifications

F220F110/110The VACPhi Two TwentyMonophonic Beam Power Amplifier&Phi 110/110 StereoBeam Power AmplifierOperation & Maintenance Information Val

8OPERATIONBy time delay, sound will begin approximately 60 seconds after turn on.As with all high fidelity products, the sound characteristic of the V

9FEEDBACKYour Phi is equipped with variable negative feedback, controlled by a toggle switch on the rear panel.The switch has two positions: zero feed

10INSTALLING NEW OUTPUT TUBESOutput tubes are type KT88. Replacement output tubes should be purchased from VAC. It isimportant that the tubes be check

11CHECKING OUTPUT TUBE CONDITIONAs described at the beginning of this manual, the Phi is equipped with the KT88 Sentry circuit,which continuously moni

12REPLACEMENT OF LOW LEVEL TUBESAll power must be switched off. Allow tubes to cool down. Remove the top glass cover. Removeand replace with new tubes

13TIPS & ADVICE SECTIONA Word About Tubes in GeneralIt is true that each brand of tube sounds different in a particular high resolution circuit. T

14Tips: Output TubesYour VAC Amplifier uses the KT88 kinkless tetrode. It is strongly recommended that replacementtubes be purchased only from VAC. If

15Tips: Impedance MatchingWe strongly suggest that you experiment with the three available impedance connections for thebest sonic match with your sys

16Tips: Audio GroundingSystems incorporating single-ended interconnect cables (“RCA cables”) are prone to a problemknown as “ground looping”, which ca

17SPECIFICATIONSThe VAC Phi has been developed with the critical ear as the major arbiter of quality, with bothconventional and unique measurements pr

PLEASE READ CAREFULLYYour Phi Beam Power amplifier is fitted with a unique output tube monitoring circuit. Rather thandirectly contacting the audio pa

WARRANTYYour equipment is warranted for a period of thirty (30) days from the date of purchase. In addition, if theregistration form is received by VA

1CAUTIONTHE AMPLIFIER AND POWER SUPPLY CONTAIN NO USER SERVICEABLE PARTS. DO NOT REMOVE THEBOTTOM PLATES OR CHASSIS COVERS. LETHAL VOLTAGES ARE PRESEN

2INTRODUCTIONThe Phi Beam Power amplifiers are unique power amplifiers, and the most power and detailed inVAC’s history. Excellent linearity is achiev

3UNPACKING & ASSEMBLYThe vacuum tubes and glass covers are packed individually to prevent damage, and must be fittedto the amplifier before instal

4The front glass has the etched VAC logo. Install this between the front pillars.Take great care not to scratch this glass.The front glass fits into a

5Tighten the four white nylon setscrews that secure the front glass using thetool provided. Turn clockwise to tighten.Do not over tighten.Install the

6INSTALLATION01)Attach the cord from the power supply to the amplifier and screw the connector collardown fully; this takes many turns. 02)Connect the

7INPUT CONNECTORSXLR connection, balanced or single-ended, are made to the XLR jack on therear panel.The INPUT SELECT toggle switch is set to the BALA