JimB wrote:It is interesting that the ST-70 and Mark III manuals do not mention having speakers or other load connected to the outputs when setting the bias initially. I wonder why, if this is so deadly to the output transformers?
Because they were drooling over the thought of collecting that
$ 7.50 plus the cost of parts for every blown up amplifier that
Railway Express brought them to fix. (see ST-70 manual)