wungun wrote:A thermistor is an inrush limiter, and they are widely used as such. Key word here is inrush...
They quickly warm up and start conducting an n current is applied. It may be reducing my wall E down a volt or 2, which is fine, as the Dynaco were design in a world of 110 or 112V.
Your rectifier is a better inrush limiter for the B+. It just drips out the voltage to the filter caps very slowly compared to the rate they are expecting (built to take) to be charged.
Your inrush limiter allows 3A @ 125V from the gito. The inrush limiter is up to operating temperature and its lowest resistance long before the GZ34 has slowly come up to full conduction allowing it to charge the first filter cap, and everything else downstream. By then, the initial rush through the heater circuit is over and the CL-80 is hot and is not limiting anything because the load should be lower than 3A by then.
Headed for Tishomingo to sing in a can...