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Just be careful that any stray magnetic field from that transformer doesn't interfere with the CRT's deflection. Interference of this sort will look like a slow waving of the image on the CRT. Turning the transformer physically can help to null this out. Also mounting it as far away as you can helps. Under chassis can help as well.
Back to back 9 V zener diodes could be used instead. 9V as the peak voltage on 6.3VAC is about 9V. Short term overvoltage won't hurt the heater, higher heater voltage is used when the tube is freshly made and evaculated at the factory.
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07-10-2007, 02:41 PM
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