OWNER'S MANUAL
PV4
VACUUM TUBE PREAMPLIFIER
conrad-johnson design, inc.
703-698-8581
Page 1: ...OWNER S MANUAL PV4 VACUUM TUBE PREAMPLIFIER conrad johnson design inc 703 698 8581...
Page 2: ...was designed to provide audiophiles with a moderately priced preamplifier of high quality which would accurately reproduce the dynamics tonalities and textures of a live musical performance The design...
Page 3: ...mal wear and maintenance are not covered by this warranty 3 The above warranty may be transferred to subsequent owners provided that the warranty registration card has been returned to conrad johnson...
Page 4: ...be returned to the factory for service All equipment serviced at the factory will perform to its published specifications when returned Factory service will be offered at reasonable rates Transferabl...
Page 5: ...xecuted entirely with precision low noise metal film resistors The line stage consists of a single voltage amplifier direct coupled to a cathode follower with an overall feedback loop Plate voltage is...
Page 6: ...keep the unit well away from the power amplifier and route power cords away from input cables THE PV4 IS TO BE OPERATED ONLY ON AC LINE VOLTAGE OF 108 to 125 VOLTS 50 or 60 HZ In any system of audio...
Page 7: ...and are electronically equivalent The outputs of your tape recorder should be connected to the Tape input Outputs Record Connect to the inputs of your tape recorder Output Connect to the inputs of amp...
Page 8: ...are source and tape copy when recording Balance Permits continuous control of location of stereo image from left to right In the full counterclockwise position only the left channel will be heard Simi...
Page 9: ...n correct absolute phase is obtained by the following simple rule THE TOTAL NUMBER OF PHASE INVERSIONS IN THE SIGNAL PATH SHOULD BE EVEN If the number of phase inverting components is either none or e...
Page 10: ...her cost or prestige We know of no vacuum tubes available of the specified types which will improve the sonic performance of your PV4 Also the tubes in your preamplifier have been tempered by a contro...
Page 11: ...ransformer This fuse will not fail in normal operation Failure of the fuse is a symptom of a more serious problem so the unit should be taken to a qualified service center IN NO EVENT SHOULD THE FUSE...
Page 12: ...inverting Phono overload in excess of 500mv at 1kHz Response bandpass 2Hz to more than 1OOkHz RIAA equalization to 25db 20 20kHz Total hum and noise 20 2kHz Phono inputs 70db below 10mv input High Lev...
Page 13: ...commend that you ship via United Parcel Service UPS In all cases be sure to adequately insure your component Be sure to enclose a note explaining the problem you are having in as much detail as possib...
