UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Cathode Ray · 29th Dec 2018, 9:39 pm

I'll have a go at that one...

The trafo is about 85% efficient, it draws 75w on no load, and it's a 500VA rated trafo, so 75/500=15% loss
Assuming 500VA is the continioulsy rated value that leaves 425 watts to play with. My Philips BX548 draws 65 Watts, so I think it could power 6 radios.
Do I get a

?

But like you said, I only want this for periodic testing. It's not intended for continuous bench.

Going back to the shed now to see how the current changes with voltage, I expect it's non-linear.

29th Dec 2018, 9:39 pm	#15
Cathode Ray Pentode Join Date: Dec 2018 Location: County Meath, Ireland Posts: 242	Re: Variac first or Isolation first ? I'll have a go at that one... The trafo is about 85% efficient, it draws 75w on no load, and it's a 500VA rated trafo, so 75/500=15% loss Assuming 500VA is the continioulsy rated value that leaves 425 watts to play with. My Philips BX548 draws 65 Watts, so I think it could power 6 radios. Do I get a ? But like you said, I only want this for periodic testing. It's not intended for continuous bench. Going back to the shed now to see how the current changes with voltage, I expect it's non-linear.