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Old 21st Feb 2021, 8:02 pm   #4
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 6,985
Default Re: Amplion HU610. Power problem.

Hi John, the function of the Barretter is to stabilise the conditions on the valve heaters.
To ensure it is working correctly try measuring the AC voltage across one of the valves' heaters and compare it with the data book

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