Ametek / EG&G / Princeton Applied Research AM-1 Input Transformer

The Ametek/EG&G/Princeton Applied Research AM-1 is an input transformer engineered for low-source impedance applications to minimize noise when interfacing with high-input impedance preamplifiers. The 1:100 turns ratio provides impedance matching and signal conditioning for sensitive measurement systems. Optimized for source impedances below 100 ohms, the AM-1 delivers low-noise performance across its specified bandwidth.

Technical Specifications

• Turns Ratio: 1:100


• 3 dB Bandwidth: 1 kHz to 10 kHz at 10 ohms source impedance


• Noise Figure: Optimized for source impedances less than 100 ohms

Key Features The AM-1 is purpose-built for direct integration with precision preamplifiers in low-impedance source environments. Its fixed turns ratio provides predictable impedance transformation without adjustment. Performance is optimized when source impedance remains below 100 ohms, ensuring minimal noise contribution to the signal chain.

Typical Applications The AM-1 serves systems requiring signal conditioning from low-impedance sources prior to high-impedance preamplification. Common deployments include laboratory measurement setups, sensor interface applications, and instrumentation requiring low-noise performance at low source impedances.

Compatibility & Integration The AM-1 is recommended for use with the Princeton Applied Research Model 113 Low-Noise Preamplifier and is compatible with the AM-2 and Model 190 input transformers. Integration occurs at the preamplifier input stage, where the transformer conditions signals before amplification. The product family encompasses variations designated as AM-1, AM-2, II3, and Model 190, with cross-compatibility depending on application requirements and source impedance characteristics.