Dynaco PAT-4A
A solid-state stereo preamplifier manufactured in the United States during the 1960s or 1970s.
Overview
It was designed to provide line and phono preamplification with input sensitivity of 10mV and a headphone output capable of driving 600 ohm headphones. The unit is noted for its use of wafer-type selector switches, which are prone to failure and difficult to replace.
Specifications
| Product type | Solid-state preamplifier / Stereo Preamplifier |
| Country of manufacture | United States |
| Input Sensitivity | 10mV |
| Signal to Noise Ratio | 70dB (MM), 85dB (line) |
| Headphone output | Sufficient power for 600 ohm headphones |
Design
The PAT-4A is a solid-state preamplifier with no further circuit topology, component, or construction details available in the provided research.
Market
Listed prices for the Dynaco PAT-4A have ranged from $50 to $189, with units often sold as untested or for parts. Common issues include broken selector wafer switches, which are difficult to replace, and missing knobs. Interest in rebuilding the unit exists, as indicated by active forum discussions.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.