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1100 man · 15th Feb 2018, 12:51 am

Hi Andy,
You will need to measure the resistance of the overwind before advice can be given on the value of the current that will need to be passed through it to generate about 1Watt of heat.
There seems to be a very large variation of resistance values between different transformers.
Cheers
Nick

15th Feb 2018, 12:51 am	#29
1100 man Octode Join Date: Apr 2016 Location: Ventnor, Isle of Wight, & Great Dunmow, Essex, UK. Posts: 1,377	Re: GEC BT336 possible tube change Hi Andy, You will need to measure the resistance of the overwind before advice can be given on the value of the current that will need to be passed through it to generate about 1Watt of heat. There seems to be a very large variation of resistance values between different transformers. Cheers Nick