CONTENTS
Model 7PX3.5 RIAA Phono Preamplifier.................................................
1
Model 7PX3.5/B RIAA Phono Preamplifier............................................
1
Applying AC Power ................................................................................. 2
About the DC Servos ................................................................................ 3
Input/Output Connections ...................................................................... 3
Setting Gain ................................................................................................ 4
Input Impedance and High Frequency Contour ................................. 5
Effect of High Frequency Contour on MC Cartridge Response.........6
Setting Input Impedance ..........................................................................8
Setting High Frequency Contour ............................................................7
Recommended Loadings for Various MC Cartridges ......................... 9
Warranty Service and Repair .................................................................. 10
Model 7PX
3.5
& 7PX
3.5
/B
RIAA Phono Preamplifier
Operating Manual
*NOTE: VERSION 3.5 IS IDENTICAL TO VERSION 3.0 IN OPERATION AND FEATURES .
(PREAMPLIFIER VERSIONS 3.0 AND HIGHER REQUIRE POWER SUPPLY MODEL XPS7B WHICH HAS A
HIGHER OUTPUT VOLTAGE THAN MODEL XPS7A. DO NOT USE THE MODEL XPS7B POWER SUPPLY
ON PREAMPLIFIER VERSIONS EARLIER THAN 3.0 AS THE HIGHER VOLTAGE MAY CAUSE THE
INPUT FUSES IN THE POWER SUPPLY TO BLOW.)
*Preamp Version: ________
Power Supply Model: _____________
Preamp Serial No. ____________________
Power Supply S/N.__________________
Rev. 1 January, 1999
