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Ver. 0.1 - ©Phædrus Audio Ltd. 2011 All rights reserved.

User Manual for

PHILTER - passive EQ and tube amplifier

This manual is also available as a pdf download, Go to:

www.phaedrus-audio.com

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Summary of Contents for Philter

Page 1: ...Ver 0 1 Ph drus Audio Ltd 2011 All rights reserved User Manual for PHILTER passive EQ and tube amplifier This manual is also available as a pdf download Go to www phaedrus audio com...

Page 2: ...is to reproduce the quality and character of classic equipment but in a modern highly reliable and cost effective way Chapter 1 Background The Ph drus Audio products came about because two recording m...

Page 3: ...r designed from the common source of Mullard s reference audio designs and thereby sharing a common heritage with the REDD amplifiers was developed We called this amplifier the Phaedrus PHILHARMONIC l...

Page 4: ...ps Although Ph drus Audio equipment uses printed circuit boards to ensure consistent performance and reliability the equipment follows classic practices such as star earths and natural contour trackin...

Page 5: ...w phaedrus audio com or by contacting sales phaedrus audio com Ph drus Audio Ltd warrants that the equipment it manufactures shall be free from defects in material and workmanship for a period of one...

Page 6: ...extended warranty is ordered after the initial warranty has expired then the intervening period is charged without exception Please contact your dealer or Ph drus Audio Ltd for current prices Warranty...

Page 7: ...insulated class II types see above It should therefore be appreciated that A CONNECTION TO EITHER THE PHAB the PHAME PHILTER of the PHI product CAN NEVER BE RELIED UPON PROVIDE A PROTECTIVE OR SAFETY...

Page 8: ...ignation for the EF86 and the CV4085 a special quality version for military use The EF86 tube is still being produced in Russia and in the Slovak Republic under JJ Electronics brand name formerly Tesl...

Page 9: ...rs or more That s over eleven year s continuous use So do not replace valves tubes just because they have seen a few years service Ph drus Audio Ltd can provide suitable valves tubes as spares which a...

Page 10: ...led connections on professional XLR connectors Operating levels are covered below One word of warning remember the line amplifier makes up for the loss in the passive Q circuits when the controls are...

Page 11: ...anit clockwise to cut in 2dB steps The central control may be used to modify the character of the treble frequency boost Depending on the frequency setting 2 5kHz 3 5kHz 5kHz 8kHz 10kHz 12kHz when th...

Page 12: ...to EBU R64 1992 standard and 14dBFS on equipment aligned to SMPTE RP155 as illustrated On a broadcast standard PPM peaks should be set to read 6 on the BBC scale or 8 on the European EBU scale Output...

Page 13: ...es a dual triode valve in which the two devices are wired in parallel This paralleling of the two triodes has the beneficial effects of doubling the mutual conductance and halving the anode resistance...

Page 14: ...Ver 0 1 Ph drus Audio Ltd 2011 All rights reserved Equaliser performance Equaliser performance is best defined graphically and that is how it is presented below Control extremes...

Page 15: ...Ver 0 1 Ph drus Audio Ltd 2011 All rights reserved Peaking responses Mid position response 1dB variation...

Page 16: ...Connect to Pin 1 Pin 3 Signal PHILTER Specification Circuit configuration 3 valve vacuum tube design Output Balanced transformer coupled Maximum out put level 18dBu 1kHz Input Balanced transformer cou...

Page 17: ...ox The basis on which conformity is being declared The manufacturer hereby declares that the products identified above comply with the protection requirements of the EMC directive and with the princip...

Page 18: ...__________________________ V1 volts ___________ Volts TP1 ___________ Volts TP2 ___________ Gain set ______dB 40dB or LOW GAIN position High ain test Pass Fail Distortion test Pass Fail PAD test Pass...

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