[Amps] Henry 2K-4 Failure

Adrian vk4tux at gmail.com
Wed Mar 18 19:04:52 EDT 2020


Ok on that, a 500v megger check would probably show it better.

On 19/3/20 8:52 am, gudguyham at aol.com wrote:
> 99% of the time a short won’t show with a meter in a cold tube.  On 
> rare cases yes.
>
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> On Wednesday, March 18, 2020, Adrian <vk4tux at gmail.com> wrote:
>
>     Surely a meter, ohm checking the pin resistance between the
>     cathode and
>     grid will identify the problem tube ?
>
>     Unless the short only occurs when hot.
>
>
>     Adrian Fewster
>
>     vk4tux
>
>     On 19/3/20 6:45 am, Mark - N5OT wrote:
>     > Thanks ALL!
>     >
>     > I'll swap in a different set of tubes to confirm or rule out
>     that it's
>     > one of the tubes.  Then if it is a tube, I'll do them one at
>     time to
>     > figure out which tube it is.
>     >
>     > Thanks for all the great answers.  A bunch of "it's probably a
>     tube"
>     > then a couple outlier answers for if it turns out to not be a
>     tube :-)
>     >
>     > 73 - Mark N5OT
>     >
>     >
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