F
220
110/110
The VAC
Phi Two Twenty
Monophonic Beam
Power Amplifier
&
Phi 110/110 Stereo
Beam Power Amplifier
Operation & Maintenance Information
Valve Amplification Company
Manual issued 01/24/2004
Revised 07/02/2004
Страница 1: ...10 110 The VAC Phi Two Twenty Monophonic Beam Power Amplifier Phi 110 110 Stereo Beam Power Amplifier Operation Maintenance Information Valve Amplification Company Manual issued 01 24 2004 Revised 07...
Страница 2: ...is selected the meter indicates the incoming ac voltage wall voltage Note These LED s will also be green when the amplifier is first switched on and will extinguish when the bias resistors have reach...
Страница 3: ...O NOT SET OR SPRAY ANYTHING ON THEM 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 BAC...
Страница 4: ...and phase splitting Type 6SN7 5692 octal twin triodes do the honors Two superb VAC output transformer interconnected in a way that allows high power to be delivered with the sonic purity of low power...
Страница 5: ...the chance of fingerprinting the nickel plated chassis Wipe any oils off immediately Take care to prevent the tool from scratching the chassis Remove the top frame From each of the four columns remove...
Страница 6: ...lass yet Install the six aluminum blocks at the top of the rear glass and side glasses If there is a dimple in the block it should face the outside of the amplifier Tighten the metal setscrews that se...
Страница 7: ...t contact tubes that indicates proper alignment For the 300B tubes two of the pins are of larger diameter so that the tube will only fit into the socket one way Set the beveled glass top into the alum...
Страница 8: ...tack other equipment on top of the VAC unit 07 Do not operate on carpet or any other surface that might block air flow 08 The chassis and glass will become hot in normal use 09 Do not allow the chassi...
Страница 9: ...d with RCA single ended sources by using the XLR input via the lower RCA jack and the switch set to BALANCED position Note the photo shows an earlier version that required an RCA to XLR adapter Later...
Страница 10: ...stem has been run for 48 hours at the factory the break in time of high resolution audio equipment is infuriatingly long The Phi sound will continue to season for approximately 200 hours The early sou...
Страница 11: ...riode ultra linear operation of pentodes and beam power tubes dates back to 1937 Both modes of operation are available with your VAC Phi amplifier via a single switch on the top plate Although the mod...
Страница 12: ...n one orientation determined by the plastic keyway in the center of the base Do not use excessive force Replace the top glass cover before operating the amplifier Whenever a tube is changed the bias s...
Страница 13: ...s possible that a tube within the normal current range will still display the green indicator light If a tube draws excessive current the indicator light will turn red and the high voltage supply will...
Страница 14: ...eneral and Tips Advice A Word About Low Level Tubes CARE OF CHASSIS VAC chassis are machined aluminum for superior electromagnetic performance The main chassis is finished in nickel plating which is k...
Страница 15: ...er of a tube amplifier can select those tubes which sound like the real thing in his her specific system Of course if the manufacturer you prefer is rare you may want to purchase a few spare tubes for...
Страница 16: ...er and driver tubes in the Phi is the 6SN7 medium mu octal twin triode Your amplifier is fitted with the current production VAC Tested 6SN7 from China which we find superior to the NOS types we have t...
Страница 17: ...to 8 ohms 4 ohms 2 to 4 ohms 2 ohms 1 to 2 ohms Phi 220 only Since the impedance of most loudspeakers vary over a wide range experimentation is essential Most speakers have a rated impedance of 4 or 8...
Страница 18: ...nects with good shielding properties 3 Keep the two amplifiers and their cables as close together as possible 4 Use the same AC outlet for both channels 5 Keep the AC cords away from the audio cables...
Страница 19: ...he immortal words of Daniel von Recklinghausen if it measures good and sounds bad it is bad If it measures bad and sounds good you ve measured the wrong things For those concerned with test bench perf...
Страница 20: ...lephone _______ _______ _____________ e mail __________________________________ Dealer name ________________________________ City ____________________________________ Salesperson ___________________ P...
