TRIODE ELECTRONICS DYNACO ST-70 KIT

 

        

      Triode Electronics unit under construction.            Completed ST-70 on the test bench (note well deserved beer on right)

This ST-70 uses the Triode Electronics EF-86 board. In the role of Phase splitter is a 12AU7. Power valves are E34L's and the rectifier is a GZ-34.

UPDATE  14 DEC 09

Replaced Bias potentiometer and circuitry with a DIY Hifi Supply Active Bias Control Module

 

Only one board is needed to control the bias voltage for both sides of the ST-70. Alternatively two boards would allow individual Bias control of each E34L valve.

This module provides a 'Rock Solid' control of the Bias voltage, reducing any smearing of the sound. It's as though a veil has been lifted from the performance. Highly Recommended !!