OWNER'S MANUAL
PV 7
VACUUM TUBE PREAMPLIFIER
conrod-johnson design, inc.
703-698-8581
Page 1: ...OWNER S MANUAL PV 7 VACUUM TUBE PREAMPLIFIER conrod 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: ...arge d Normal 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 conra...
Page 4: ...ctory for service All equipment serviced at the factory will perform to its published specifications when returned Factory service will be offered at reasonable rates Transferable warranty conrad john...
Page 5: ...ene dielectric The line stage consists of a single voltage amplifier direct coupled to a cathode follower with an overall feedback loop Plate voltage is supplied by a sophisticated low impedance volta...
Page 6: ...keep the unit well away from the power amplifier and route power cords away from input cables THE PV7 IS TO BE OPERATED ONLY ON AC LINE VOLTAGE OF 108 to 125 VOLTS 50 or 60 HZ In any system of audio e...
Page 7: ...dges optimum performance requires higher capacitive loads This may be achieved by soldering suitable value capacitors across the phono input jacks Polystyrene capacitors are recommended for this purpo...
Page 8: ...the tape loops is used for an external signal processor that tape loop should never be selected and of course there is no reason to select it since the external processor is not itself a program sour...
Page 9: ...her cost or prestige We know of no vacuum tubes available of the specified types which will improve the sonic performance of your PV7 Also the tubes in your preamplifier have been tempered by a contro...
Page 10: ...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 11: ...e of all inputs including phono Phono overload in excess of 500mv at 1KHz Response bandpass 2Hz to more than 100 KHz RIAA equalization to 25db 20 20KHz Total hum and noise 20 20KHz Phono inputs 72db b...
Page 12: ...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...
