by dcriner » Wed May 11, 2016 4:44 pm
Most people that that are of a certain age and that admire the original Dynaco ST-70, already have one. I wouldn't be tempted to buy this $2,500 highly modified "clone."
I wonder about replacing the 5AR4 rectifier with a solid-state plate supply. I'm concerned that the immediate, instantaneous ramp-up of B+ might cause wear and tear on the other tubes? For my ST-70, I have a Mullard made-in-England (G.E. branded) 5AR4, which should last indefinitely (unlike JJs or Chinese versions).
The new Radial offering has tone controls, which might appeal to millennials, but are considered by many old-timers as anathema.
Also, the A.C. power and the speaker connections are on the same (back) side - the original ST-70 separated them to reduce hum.
Doug Criner