Re: No HV on tek 465


magaudiolab
 

--- In TekScopes@..., "Hakan H" <hahi@...> wrote:



--- In TekScopes@..., "magaudiolab" <v.maglietta@>
How did you determine it was open ? This diode (152-0409-00) has forward
drop of about 9 V at 1 mA so it can not be checked with a normal DMM.
/Håkan
Hi Håkan,
I did not use DMM at all, but a D-R series circuit (R being 22k so current max should never exceed 3mA) powered by a variable power supply (up to 60V).
Diode never showed any measurable conduction at all. If any, current is below .01uA.
Far way from 9V @ 1mA as you stated.
If it is not opened, it is likely to be a leaky diode.

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