ST-PH1 Stereo Phono Preamplifier

ST-PH1 Stereo Phono Preamplifier

Radio Design Labs - Stereo Phono Preamplifier

Stereo or Mono Phono Preamplifier
Balanced or Unbalanced Outputs
Outputs Drive Hi or Low Impedance Lines
Accurate, Low‑Noise Preamplification
Adjustable Left and Right Output Levels
RDL® SupplyFlex™ Power Input Configuration

The ST‑PH1 is a stereophonic phono preamplifier. Each of the two channel circuits is identical. The ST‑PH1 has standard 47 kΩ impedance unbalanced phono cartridge inputs. Equalization follows the RIAA curve. Each output is capable of driving balanced or unbalanced, high or low impedance loads.

RDL’s SupplyFlex power input configuration is included in the ST‑PH1. The power supply input may be fed from a floating (not ground‑referenced) 24 Vdc power source, from a bipolar power supply (+/‑ 12 Vdc or +/‑15 Vdc) or from a ground‑referenced 24 Vdc power supply.

Although phono inputs are provided on some equipment, optimum system performance is obtained when phonographs are preamplified as close to the turntable as possible, and then the line‑level signals are fed to the next equipment in the chain. The convenience of the ST‑PH1 is ideal for all such applications.

Typical Performance:

Inputs (2):		47 kΩ unbalanced
Gain:		40 to 60 dB @ 1 kHz (adjustable)
Outputs (2):		300 Ω to drive low or high impedance, balanced or unbalanced lines
Output Level:		+4 dBu nominal, adjustable; (unbalanced output 6 dB below balanced line level)
THD:		< 0.03% (10 Hz to 30 kHz, high impedance load) < 0.015% (10 Hz to 30 kHz, 600 Ω load)
Frequency Response:		RIAA curve
Noise :		< ‑75 dB (below +4 dBu)
Headroom:		18 dB (above +4 dBu)
Power Requirement:		GROUND‑REFERENCED or FLOATING, 24 to 33 Vdc @ 60 mA
Ambient Operating Environment:		0° C to 55° C

Data/Installation

Mounting Accessories:

MB-1 Mounting Kit - RU, ST and TX Series	MB-3 Kit to Mount ST, TX Series Modules on FP Panel	MSR-1 Snap Rail Adapter - STICK-ON Series
RC-1U 19" Universal Rack Chassis - RU, ST and TX Series	RU-RA3A 19" Rack Mount for 3 RACK-UP Series Products	SMK-12 STICK-ON Mounting Plate
SR-10 STICK-ON Series 19" Mounting Rack - 10 modules	SR-12A STICK-ON Series 19" Mounting Rack - 12 modules	SR-4 STICK-ON Series Mounting Rack - 7 modules
STR-19A STICK-ON Series 19" Racking System - 12 modules	STR-19B STICK-ON Series 19" Racking System - 10 modules	UC-1 Single Wide Enclosure - RACK-UP Mounts
UC-2 Double Wide Enclosure - RACK-UP Mounts	WDG1 Table Top Chassis for RU, ST and TX Series	DRA-35S STICK-ON DIN Rail Adapter - 1 module
DRA-35S6 STICK-ON DIN Rail Adapter - 6 modules	ST-RRB1 Rear rack rail mounting kit for any STICK-ON module

General Accessories:

AMS
Accessory Mounting System

ACB-2
Jack Box - Dual RCA jacks

DTB
STICK-ON® Series Detachable Terminal Block

Related Products:

EZ-PH1
Stereo Phono Preamplifier

Copyright © 2010 Radio Design Labs, Inc. RDL, Radio Design Labs, the RDL logo, STICK-ON, RACK-UP and the Rack-Up logo are registered trademarks of Radio Design Labs, Inc. Flat-Pak, RCX, SourceFlex, SupplyFlex, Sure-Lok, TX, ULTRASTYLE, and Specialists in Practical Precision Engineering are trademarks of Radio Design Labs, Inc. All other trademarks are the property of their respective owners. Typical Performance reflects product at publication time exclusive of EMC data, if any, supplied with product. Date last modified: October 26 2009

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