km1h @ juno.com wrote:
>I would be a bit cautious about using with directly heated filament
>tubes Ian. My primary concern is with HV insulation breakdown. A properly
>spec'd 5V 30A fil xfmr is designed with 5KV or more insulation and will
>not place the HV out on the AC mains in case of a catastrophic tube
>failure, etc. A switcher does not have that level of insulation.
Good point - the applications I was thinking about were all grounded-
cathode. Most switchers are not specifically designed to float far from
chassis potential (if at all).
73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.demon.co.uk/g3sek
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