--- In LTspice@..., "boid_twitty" <legg@...> wrote:
Tube life is related more to the temperature of their envelope, if the heater is reliably constructed.
I'm not sure that you can assume a more reliable tube technology, post 1960. A fifty year old piece of equipment has not demonstrated a 50 year component life.......
RL
... I've never seen that, he must have had the idea for the radiator in the second of my birth or he had no wood for his fireplace at home ....
best regards Leo...
Leo Baumann