Grover Huffman of GroverHuffman.com He is a cable manufacturer. I also have another Dynaco waiting for him to remodel. His Pharoah cables are SOTA quality at hugely lower prices. I also changed the RCAs and speaker terminals which were inexpensive from Bob's Audio http://www.tubes4hifi.com/ST70.htm
The ST70 modified has punchy, deep bass driving 6-10" woofers. It can also drive my Focuses which have 6-12" woofers with a lower impedance of 2.8 ohms in the bass.
For my main system, Grover took a chassis and transformers from an Altec 1569A and built 125w. monoblock, voltage regulated amps. After hours of use, you can put your hand around the transformers they run so cool. Unlike the EAR 890 I previously used which is Class A 70 watts and you could cook eggs on after 20 minutes.
The ST70 modified has punchy, deep bass driving 6-10" woofers. It can also drive my Focuses which have 6-12" woofers with a lower impedance of 2.8 ohms in the bass.
For my main system, Grover took a chassis and transformers from an Altec 1569A and built 125w. monoblock, voltage regulated amps. After hours of use, you can put your hand around the transformers they run so cool. Unlike the EAR 890 I previously used which is Class A 70 watts and you could cook eggs on after 20 minutes.