27-08-2024, 05:48 PM
(This post was last modified: 27-08-2024, 05:51 PM by ppppenguin.)
That would be far too high a resistor to put in the 6.3V feed where you'll probably only need a few ohms. 100R in the mains feed feels about right. If you space to fit a buck transformer that's even better as there will be little or no heat.
Measure the heater voltage on your mains, which may be above or below 230V. If it's more than 5% above 6.3V then do something about it. Otherwise don't worry about the heaters.
There's a small possibility that the mains transformer will start to saturate and get too hot on a higher mains voltage. That's why dropping the mains voltage with a resistor or buck transformer is a good idea. The proper check involves measuring the current taken from the mains at both 220V and your mains voltage. If it rises more than proportionately at your mains then the transformer is saturating and you need to do something about it.
Measure the heater voltage on your mains, which may be above or below 230V. If it's more than 5% above 6.3V then do something about it. Otherwise don't worry about the heaters.
There's a small possibility that the mains transformer will start to saturate and get too hot on a higher mains voltage. That's why dropping the mains voltage with a resistor or buck transformer is a good idea. The proper check involves measuring the current taken from the mains at both 220V and your mains voltage. If it rises more than proportionately at your mains then the transformer is saturating and you need to do something about it.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
