Digest for sci.electronics.repair@googlegroups.com - 15 updates in 5 topics

"Tom Del Rosso" <fizzbintuesday@that-google-mail-domain.com>: Feb 23 01:57PM -0500

I have a portable Whirlpool dishwasher that hasn't been needed in 10
years. If I use it right out of storage is it likely to leak from dried
out and cracked nylon couplings or something?
 
 
--
whit3rd <whit3rd@gmail.com>: Feb 23 12:31PM -0800

On Saturday, February 23, 2019 at 10:57:32 AM UTC-8, Tom Del Rosso wrote:
> I have a portable Whirlpool dishwasher that hasn't been needed in 10
> years. If I use it right out of storage is it likely to leak from dried
> out and cracked nylon couplings or something?
 
Nylon is fine when dry, but ten years is likely to leave the hoses in
poor condition (portable dishwashers usually have flex hoses to the
plumbing attach point). Those aren't hard to replace, but if you want 'em
to look pretty, get a factory-replacement part with the right crimps.
 
As for 'likely', I'd say plug it in and find out. The external layer of
the hoses might look cracked, but that ISN"T the layer that holds the
water pressure. If youi can do the first test outdoors, or over a drain,
and use a GCFI receptacle for power, faults can't hurt you.
 
But maybe you don't want the best dishes in the tub when
testing.
John Robertson <spam@flippers.com>: Feb 23 02:10PM -0800

On 2019/02/23 10:57 a.m., Tom Del Rosso wrote:
> I have a portable Whirlpool dishwasher that hasn't been needed in 10
> years. If I use it right out of storage is it likely to leak from dried
> out and cracked nylon couplings or something?
 
Also it is likely the door seals are dried out and it will happily leak
all over the place.
 
I'd test it outside instead of in my kitchen...
 
John :-#)#
Look165 <look165@numericable.fr>: Feb 24 10:33AM +0100

Generally, those gaskets are symetrical.
It might be fixed by mounting the gaset upside down.
The bottom is more compressed than the top ans thus can leak.
 
John Robertson a écrit le 23/02/2019 à 23:10 :
"Tom Del Rosso" <fizzbintuesday@that-google-mail-domain.com>: Feb 23 01:53PM -0500

Phil Allison wrote:
> Ian Jackson wrote
 
>> I feel that the horrors of WD40 are greatly exaggerated.
 
> ** The name is WD40 - not WMD40.
 
But it makes a great flame thrower. I think the propellant has
something to do with that.
Phil Allison <pallison49@gmail.com>: Feb 23 12:18PM -0800

Tom Del Rosso wrote:
 
> > ** The name is WD40 - not WMD40.
 
> But it makes a great flame thrower. I think the propellant has
> something to do with that.
 
** The propellant is CO2
 
 
 
.... Phil
thekmanrocks@gmail.com: Feb 23 03:53PM -0800

WD-40 is a CLEANER - for mechanical
movements only, not electronics. As such,
it should be followed up with a proper lubricant
in door hinges, latches, or anything else it
has been used to free up around the home
or business.
 
For electronics, use electronics cleaner. That's
why it's called 'electronics cleaner/spray'.
Phil Allison <pallison49@gmail.com>: Feb 23 06:59PM -0800


> WD-40 is a CLEANER
 
 
** It's a lubricant too - says so right on the can, fuckhead.
 
 
- for mechanical
> movements only, not electronics.
 
 
** Correct it is no use on capacitors, transistors or ICs.
 
Wot a moron !!!!!
 
 
Redundant bullshit sniped.
 
 
 
.... Phil
Ian Jackson <ianREMOVETHISjackson@g3ohx.co.uk>: Feb 24 08:23AM

In message <63f77b92-f736-4233-93cf-a43a5c5a5674@googlegroups.com>,
thekmanrocks@gmail.com writes
>in door hinges, latches, or anything else it
>has been used to free up around the home
>or business.
 
Have you ever read the specs for WD40?
 
>For electronics, use electronics cleaner. That's
>why it's called 'electronics cleaner/spray'.
 
Most cleaners clean things that are 'not on the tin'.
--
Ian
gregz <zekor@comcast.net>: Feb 24 08:37AM


> ** The propellant is CO2
 
> .... Phil
 
Used to have propane. I used it on tent worms. Now very hard to ignite.
 
Greg
Phil Allison <pallison49@gmail.com>: Feb 24 01:07AM -0800

GS wrote:
 
> > .... Phil
 
> Used to have propane.
 
 
 
** The propellant was changed to CO2 about 20 year ago.
 

 
> I used it on tent worms. Now very hard to ignite.
 
** The liquid is still highly lethal to cockroaches.
 
 
 
.... Phil
<Use-Author-Supplied-Address-Header@[127.1]>: Feb 24 06:14AM

tubeguy@myshop.com wrote:
: In the 1960s the pocket radios hit the market and were sold everywhere.
: I have not opened one of them in years, but I recall the transistors
: used in them did not look like more modern types. They had a small metal
: can. Just a straight sided metal can, shaped like modern capacitors, but
: bare metal. Some had colored dots on them to identify the leads too.
 
: First, I am thinking that they were geranium types. Is that correct?
 
: Second, I have a very old GE transistor manual (edition 2) (PDF). No
: where in there does it mention the case style of them. What is the case
: style?
 
: Seems those type of transistors came and went quickly. I assume they
: were the first generation of transistors.
 
: Shortly after, I recall seeing a lot of metal cases that were shaped
: more like a hat, with a brim. Those too vanished. And I recall seeing
: some of the hat shaped types with a point sticking out of the top. I
: always wondered what that point was for???
 
Here https://www.mklab.rhul.ac.uk/~tom/temp6 are some photos of a few
old, unusual transistors from my collection, including a red spot one.
Are any of these the types you were thinking off?
 
Regards
Tom Crane
 
Ps. The email address in the header is just a spam-trap.
--
Tom Crane, Dept. Physics, Royal Holloway, University of London, Egham Hill,
Egham, Surrey, TW20 0EX, England.
Email: T dot Crane at rhul dot ac dot uk
tesfatadesse735@gmail.com: Feb 23 04:40PM -0800

Hi i want electronic principles solutions 8th edition please
jaugustine@verizon.net: Feb 23 03:21PM -0500

<SNIP>
>memory voltage is higher than 3.6 Volts.
 
>Last time I checked, memory contents were still good after ten years!
 
>Fred
 
Hi Fred and others,
 
I forgot to mention that I was unable to identify the "unique capacitor"
by visual examination of the circuit board. I do not see any "out of the
ordinary" capacitors.
 
John
Jeff Liebermann <jeffl@cruzio.com>: Feb 23 12:52PM -0800


>My Bearcat BC855XLT looses it's memory once in a great
>while. Note: I am a service technician.
 
How long is a great while? There's a low leakage electrolytic
capacitor that will hold a charge to keep the memory alive for about 3
days maximum according to the user manual.
 
> I did NOT find (Google search) a schematic for this scanner.
 
Same here. Some user manuals, but no service manuals.
 
> This scanner has a "unique capacitor type memory back-up".
 
It's a low leakage type, probably one of these:
<https://www.mouser.com/Passive-Components/Capacitors/Aluminum-Electrolytic-Capacitors/Aluminum-Electrolytic-Capacitors-Radial-Leaded/_/N-75hqw?P=1z0wrk5&Keyword=Nichicon+Low+Leakage+Aluminum+Electrolytic+Capacitors&FS=True>
 
>I would like to modify this scanner and use a battery back-up because
>it is a HASSLE to reprogram the 50 channels.
 
You'll probably need to find the capacitor in question and measure the
operating voltage. Try turning OFF the scanner and measure the
voltage across all the likely culprits (large value electrolytics).
Anything with voltage when it's off is a possibility. You might also
check the minimum voltage needed to keep the memory alive. Then, add
a battery with a reverse protection diode to prevent the radio from
charging the battery.
 
> Or.....
> Does anyone know where I can find the modification I want to make
>to maintain memory?
 
Sorry, but it's the best I can do.
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
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