>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).
However, when glitch diodes are used in the DC cathode-return, the
potential can not rise higher than a few volts above the chassis.
Rich---
R. L. Measures, 805-386-3734, AG6K
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