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Old 23rd Feb 2021, 7:25 pm   #7
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 6,985
Default Re: Amplion HU610. Power problem.

Hi John, good to hear it is working again.
A barretter is similar to a constant current device and relies on both the temperature coefficient of the iron wire filament and the very high thermal conductivity of the hydrogen gas in the envelope. This draws more heat from the filament as it gets hotter and self regulates over a quite wide range

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