Precision Audio and AV Interface Products

Radio Design Labs

ST-PH1 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
  • Overview
  • Specifications
  • Related Products
  • Accessories
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

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.

Tech Tips

Applications

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)
Ambient Operating Environment:
0° C to 55° C
Power Requirement:
GROUND-REFERENCED or FLOATING, 24 Vdc @ 60 mA
Package Type:
Cardboard Box
Package Dimensions:
2 x 2 x 4 in.
Shipping Weight:
0.19 lbs.
WEEE weight:
0.14 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
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High Res Images:
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Declaration of Conformity:
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A&E Specifications:
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STICK-ON SERIES

STICK-ONs are the original application-specific modules for the A/V, recording and broadcast industries. Module functions include signal detection, switching, pre-amplification, format conversion, line driving, power amplification, mixing, distribution, gain control, equalization, routing and more. Each STICK-ON is an ultra-compact module engineered to provide higher performance and longer life than other industry products. STICK-ON modules are solid encapsulated hybrid circuits in durable industrial black plastic enclosures (1.55", 3.94 cm x 3", 7.62 cm x 0.65", 1.65 cm) with clear bold white lettering for the terminal block connections, recessed trimming controls and switches.

Since RDL first originated application-specific modules, STICK-ONs have led the industry in economical, high-performance and cost-effective long life solutions in system designs. Multiple STICK-ON modules can be interconnected to form all or part of an A/V system. A single STICK-ON module may be mounted right where its function is needed, often to add an input, output, or gain adjustment to existing equipment. STICK-ON modules allow customizing an A/V system to precisely match users’ needs. Adding STICK-ONs to an existing system can extend system life by adding updated features, resulting in considerable cost savings. A complete range of backboard and rack mounting options is available for systems comprised of multiple STICK-ON modules.

The technology used in STICK-ON modules has been regularly updated over the years to insure industry-leading performance. Functions and features provided by STICK-ONs, since their introduction, are still available today. This continuity in product offering and support makes STICK-ON modules the preferred long-term resource for system design solutions. STICK-ON SERIES modules are designed and manufactured in the U.S.A.

ST-PH1 ST-PH1