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Kolster-Brandes MR10
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26th Sep 2019, 11:58 am
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ms660
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Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
Re: Kolster-Brandes MR10
Quote:
If the 12AT7 heaters aren't working it can only be one of two things, either there's no heater voltage supply to the valve or the valves heaters are open circuit (in effect)
A step to a hint please on how to check these out?
Lawrence.
ms660
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