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PJL · 29th Oct 2020, 3:02 pm

From what I understand you are using a 240-120V step down transformer. This is very likely to be an auto-transformer so will not provide any isolation from the mains so the set will have a live chassis. It needs to be good for at least 50W.

I think you would have been better off using your original bridge rectifier design and that would work out at at around 150-160V DC after a bit of filtering. According to radiomuseum there are multiple versions of the 830C for different DC mains voltages, what version is yours?

29th Oct 2020, 3:02 pm	#9
PJL Dekatron Join Date: Sep 2005 Location: Seaford, East Sussex, UK. Posts: 5,997	Re: Philips 830C here we go.... From what I understand you are using a 240-120V step down transformer. This is very likely to be an auto-transformer so will not provide any isolation from the mains so the set will have a live chassis. It needs to be good for at least 50W. I think you would have been better off using your original bridge rectifier design and that would work out at at around 150-160V DC after a bit of filtering. According to radiomuseum there are multiple versions of the 830C for different DC mains voltages, what version is yours?