Digest for sci.electronics.repair@googlegroups.com - 19 updates in 2 topics

legg <legg@nospam.magma.ca>: Nov 23 10:55AM -0500

On Sun, 06 Nov 2022 10:07:50 -0800, Jeff Liebermann <jeffl@cruzio.com>
wrote:
 
>higher voltage rating. A few drive transistors burnt/shorted and
>replaced those."
 
>Maybe give Samlex a call and ask for a better schematic?
 
I've cut tracks to monitor power fet current in the offending
side of the bridge, and see noticeable crossconduction there
under all load conditions, when pwming.
 
The fet driver board, powered and running in isolation, shows
no gate drive issues - dead time is actually generated on this
board. ~500nS should be sufficient with 10R series gate
resistors, and there is no difficulty demonstrated in driving
capacitive loads.
 
A modest negative 'off' bias is developed by zener/dc restoration
on a series coupling capacitor.
 
It's basically just an isolated buffer with full fet control
deveoped in a separate small signal section.
 
The presence of cross-conduction makes no sense, if the gate
drive circuit is testing functional, though it would easily be
attributed as causal in early limiting of the phase arm.
 
RL
Chris Green <cl@isbd.net>: Nov 22 05:04PM


> > Birds manage with internal testes.
 
> I was always told our testes needed to be 36C, not 37C like inside us.
> Yet a bird is 40C body temperature.
 
Yes, but why do they need to be a bit cooler than our body
temperature? Wouldn't it make much more sense in evolutionary terms
for them to work properly at body temperature?
 
--
Chris Green
·
"Commander Kinsey" <CK1@nospam.com>: Nov 22 05:25PM


> Yes, but why do they need to be a bit cooler than our body
> temperature? Wouldn't it make much more sense in evolutionary terms
> for them to work properly at body temperature?
 
Indeed, as I said birds have them operating at 40C, so it's entirely possible for them to work at our 37C.
 
Maybe it's to attract the female. But in birds the need to not have them causing aerodynamic drag when flying is greater, besides they have pretty feathers to show off instead.
Peeler <trolltrap@valid.invalid>: Nov 22 06:36PM +0100

On Tue, 22 Nov 2022 17:04:26 +0000, Chris Green, the mentally deficient,
notorious, troll-feeding, senile idiot, blathered again:
 
 
> Yes, but why do they need to be a bit cooler than our body
> temperature? Wouldn't it make much more sense in evolutionary terms
> for them to work properly at body temperature?
 
Don't worry, senile sucker of troll cock. The unwashed wanker's cock will
quickly take on the temperature in your mouth!
Ed Pawlowski <esp@snet.xxx>: Nov 22 12:55PM -0500

On 11/22/2022 12:04 PM, Chris Green wrote:
 
> Yes, but why do they need to be a bit cooler than our body
> temperature? Wouldn't it make much more sense in evolutionary terms
> for them to work properly at body temperature?
 
It is in the works but evolution is slow. Probably will take another
30,000 years to eliminate the scrotum. OTOH, if you piss off you wife
it may be eliminated in one day.
Tim+ <tim.downie@gmail.com>: Nov 22 05:59PM


> Yes, but why do they need to be a bit cooler than our body
> temperature? Wouldn't it make much more sense in evolutionary terms
> for them to work properly at body temperature?
 
You're forgetting sexual selection. Women clearly selected men with ugly
dangly bits. ;-)
 
Tim
 
--
Please don't feed the trolls
"Commander Kinsey" <CK1@nospam.com>: Nov 22 06:00PM


> It is in the works but evolution is slow. Probably will take another
> 30,000 years to eliminate the scrotum. OTOH, if you piss off you wife
> it may be eliminated in one day.
 
Birds have already done it.
"Commander Kinsey" <CK1@nospam.com>: Nov 22 06:03PM

>> for them to work properly at body temperature?
 
> You're forgetting sexual selection. Women clearly selected men with ugly
> dangly bits. ;-)
 
Presumably they like them.
 
Mind you, not sure why so many short-cocked men still exist. The internet says the average is a pathetic 6 inches. If I had 6 inches, it would fall out whenever I drew back a bit.
"Peter W." <peterwieck33@gmail.com>: Nov 22 11:05AM -0800

> Mind you, not sure why so many short-cocked men still exist. The internet says the average is a pathetic 6 inches. If I had 6 inches, it would fall out whenever I drew back a bit.
 
I take back everything about blissful and invincible. Ignorance is curable.
 
You are, for the record, incurably stupid, and entirely unencumbered by the thought process.
 
Peter Wieck
Melrose Park, PA
"Rod Speed" <rod.speed.aaa@gmail.com>: Nov 23 06:47AM +1100

On Tue, 22 Nov 2022 22:49:53 +1100, Max Demian <max_demian@bigfoot.com>
wrote:
 
>> And atheists would consider it correctly evolved for purpose, so why
>> alter it?
 
> Why doesn't it retract when not in use, like dogs?
 
You can run the same line about fur, why don't
humans have fur like apes and dogs and cats ?
 
> And why oh why are mammalian testicles outside the body?
 
There is some line about that allowing the testicies to be cooler.
 
> Birds manage with internal testes.
 
Not sure if birds have the same body temperatures.
 
Maybe hanging out in the breeze wouldnt work as well with flying animals
like birds, they could get caught on branches etc when landing on a branch.
Peeler <trolltrap@valid.invalid>: Nov 22 09:24PM +0100

On Wed, 23 Nov 2022 06:47:25 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:
 
<FLUSH the abnormal trolling senile cretin's latest trollshit unread>
 
--
The Natural Philosopher about senile Rodent:
"Rod speed is not a Brexiteer. He is an Australian troll and arsehole."
Message-ID: <pu07vj$s5$2@dont-email.me>
farter <tsruhf@gmail.com>: Nov 23 07:54AM +1100


> Yes, but why do they need to be a bit cooler than our body
> temperature? Wouldn't it make much more sense in evolutionary terms
> for them to work properly at body temperature?
 
Maybe that is easier said than done with the higher mammals.
 
There has to be a reason that it is so common.
Peeler <trolltrap@valid.invalid>: Nov 22 09:57PM +0100

On Wed, 23 Nov 2022 07:54:06 +1100, farter, better known as cantankerous
trolling senile geezer Rodent Speed, wrote:
 
<FLUSH the abnormal trolling senile cretin's latest trollshit unread>
 
--
Website (from 2007) dedicated to the 88-year-old senile Australian
cretin's pathological trolling:
https://www.pcreview.co.uk/threads/rod-speed-faq.2973853/
farter <tsruhf@gmail.com>: Nov 23 08:07AM +1100

>> for them to work properly at body temperature?
 
> It is in the works but evolution is slow. Probably will take another
> 30,000 years to eliminate the scrotum.
 
The problem with that line is that the higher mammals like
humans and even cattle and sheep evolved after birds.
farter <tsruhf@gmail.com>: Nov 23 08:09AM +1100

>> for them to work properly at body temperature?
 
> You're forgetting sexual selection. Women clearly selected men with ugly
> dangly bits. ;-)
 
Doesn't explain cattle, dogs and sheep.
Bob F <bobnospam@gmail.com>: Nov 22 01:38PM -0800

On 11/22/2022 9:04 AM, Chris Green wrote:
 
> Yes, but why do they need to be a bit cooler than our body
> temperature? Wouldn't it make much more sense in evolutionary terms
> for them to work properly at body temperature?
 
Better get the GOP working to pass legislation to make it the way you
want it.
"Commander Kinsey" <CK1@nospam.com>: Nov 22 10:10PM

>> for them to work properly at body temperature?
 
> Better get the GOP working to pass legislation to make it the way you
> want it.
 
Somebody has to fix things, the liberal thieves certainly won't.
 
By the way, Gauntlet Of Power?
Peeler <trolltrap@valid.invalid>: Nov 22 11:10PM +0100

On Wed, 23 Nov 2022 08:07:04 +1100, farter, better known as cantankerous
trolling senile geezer Rodent Speed, wrote:
 
<FLUSH the abnormal trolling senile cretin's latest trollshit unread>
 
--
Norman Wells addressing trolling senile Rodent:
"Ah, the voice of scum speaks."
MID: <g4t0jtFrknaU1@mid.individual.net>
Peeler <trolltrap@valid.invalid>: Nov 22 11:11PM +0100

On Wed, 23 Nov 2022 08:09:00 +1100, farter, better known as cantankerous
trolling senile geezer Rodent Speed, wrote:
 
<FLUSH the abnormal trolling senile cretin's latest trollshit unread>
 
--
Bod addressing abnormal senile quarreller Rodent Speed:
"Do you practice arguing with yourself in an empty room?"
MID: <g4ihlaFh5p5U2@mid.individual.net>
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