Product Features: Dyna-70 Power Transformer (PA-060-70): Construction: Features a taller lamination stack for cooler operation and reduced noise compared to original PA-060 models. The PA-060-70 features an increased thickness of the lamination stack and the lamination the plates are now made from M6 steel and feature a copper Flux band around the transformer for reduced EMI/RFI noise and improved efficiency. Specifications: Operates at 120 VAC @ 50/60 Hz, with a high voltage B+ 720 VCT (360-0-360 @ 300 mA), a negative 55V bias output, dual 6.3 VAC @ 5A heater filament outputs, and a 5.0 VAC @ 4A rectifier output. Compatibility: Direct drop-in replacement for Dynaco-ST-70 amplifiers, and required for the Dyna-70 Ultimate Upgrade, providing reliable power for 6SN7 heater filaments.

Dyna-120 Power Transformer (PA-060-120): Construction: Heavier and taller than the PA-060-70, with increased thickness of the lamination plates, the plates are now made from M6 steel and feature a copper Flux band around the transformer for reduced EMI/RFI noise and improved efficiency. Specifications: Operates at 120 VAC @ 50/60 Hz, with a high voltage B+ 820 VCT (410-0-410 @ 450 mA), a negative 55V bias output, dual 6.3 VAC @ 6A heater filament outputs, and a 5.0 VAC @ 5A rectifier output. Compatibility: Designed for the Dyna-120 Ultimate Upgrade, supporting more powerful 6550/KT-88 tubes and delivering 60 watts per channel.