[ARC5] Smart People - OT Why pentods fail (was Triodes & Pentodes)

[Bruce Long]

Of course electrons have gender.  The problem is because of Heisenberg you can never be certain of the gender---Kinda like the kids hanging out at the local mall.

Apologies to leslie who has seen this before





On Thursday, November 14, 2013 10:19 PM, Dennis Monticelli <dennis.monticelli at gmail.com> wrote:
 
Boy, I must have been asleep in physics class.  I don't remember any of this electron breeding stuff!

Dennis AE6C



On Thu, Nov 14, 2013 at 12:05 PM, Bruce Long <coolbrucelong at yahoo.com> wrote:

leslie is WRONG
>
>Electrons have no weight at all.   But they do come in pairs as male electrons and female electrons. Otherwise where would little electrons come from?  As they accumulate on the screen they have no place to go and they get crowded closer and closer together.   Eventually nature takes its course and they get hot?
>
>Understand?
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>On Thursday, November 14, 2013 1:00 PM, Tim <timsamm at gmail.com> wrote:
>
>Hi Les - Thanks for explaining that....Very interesting!  I had previously
>thought that the main failure mode was caused by the vacuum leaking out.
>Who knew?
>Tim
>N6CC
>
>
>On Wed, Nov 13, 2013 at 10:16 PM, Leslie Smith <vk2bcu at operamail.com> wrote:
>
>>  "The screen failure will not be due to voltage over max but excess
>>  dissipation."
>> >
>> > I agree.
>> >
>> > Ken W7EKB
>>
>> Aw- Ken!
>> The above is nonsense, and I'm onto you.   :-;    It's not dissipation
>> (I-squared R heat) that causes the damage.
>>
>> The screen sags from the weight of accumulating electrons; the flow of
>> electrons is impeded by the thin wire.  :-(
>> We get the word, impedance from the latin, "impedire", meaning "to
>> shackle the feet" - and this is exactly what the thin grid wire does -
>> it impedes those little electronic feet.
>>
>> Note:  Screen-grids built from thicker wire allow the electrons to
>> escape; there is no sagging.  :-)
>> As for the the plate - it doesn't sag even a little.  Being thicker and
>> more robust, it can take the weight.
>>
>> As more electrons accumulate the screen grids sags, more and more, until
>> it touches the cathode.
>> The resulting short circuit  results in a decent "bang!".
>> This is the true failure mode.  Trust me.
>> I know nearly list-reader here will agree, particularly the better
>> informed readers.  :-) :-)  :-)
>>
>> Les
>>
>> (PS  I hope I don't get banned from  the list for stating the truth)
>>
>> --
>> http://www.fastmail.fm - A fast, anti-spam email service.
>>
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