Quote:
Originally Posted by rmlowz
Hello Forum Friends,
Does anyone know if I can use a 71A tube in my Inspire 45/2A3
Thanks
rmlowz
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71A uses a 5V filament, while a 45 or 2A3 uses a 2.5V filament. Plus, not only does the 71A typically use a lower plate voltage, a single 71A is good for All of 0.8 watt, not enough to really operate most speakers. I built a parallel single ended 71A amp using three 71A output tubes per channel for a whopping total of about 2 wats per channel, but that amp has been mothballed because of a lack of space for creating a necessary modification...