Digest for sci.electronics.repair@googlegroups.com - 22 updates in 8 topics

Ralph Phillips <ralphp@philent.biz>: Feb 24 02:32PM -0600

On 2/23/2018 9:22 AM, JBI wrote:
> is coming from the inverter, so how would I negate it? I've tried about
> 5 snap closed ferrite cores around the power cable going into the laptop
> but they haven't helped. Thanks.
 
Use a 12V supply for your laptop?
 
For my Dell Lattitude D630, I can use one like this:
 
https://www.ebay.com/itm/DC-Car-Air-Charger-for-90W-Dell-Laptop-D09RM/262961901405
 
RwP
gregz <zekor@comcast.net>: Feb 25 09:32AM


> A differential amp, to get rid of a ground loop.
 
> Or feed both devices from the same minus 12v point.
 
> Or both.
 
I don't know the problem, but a transformer isolator may help or work.
 
Greg
Adrian Caspersz <email@here.invalid>: Feb 25 02:36PM

On 23/02/18 15:22, JBI wrote:
> is coming from the inverter, so how would I negate it?  I've tried about
> 5 snap closed ferrite cores around the power cable going into the laptop
> but they haven't helped.  Thanks.
 
Has the laptop & car audio got bluetooth?
 
--
Adrian C
Fox's Mercantile <jdangus@att.net>: Feb 24 11:22AM -0600

> I guess I am just losing it.
 
We've noticed.
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
jurb6006@gmail.com: Feb 24 03:26PM -0800

>"We've noticed. "
 
Hardy har har. Got any ideas on this VCR?
Fox's Mercantile <jdangus@att.net>: Feb 25 03:26AM -0600

>> "We've noticed."
 
> Hardy har har. Got any ideas on this VCR?
 
Yeah. A dumpster comes to mind.
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
John-Del <ohger1s@gmail.com>: Feb 25 04:46AM -0800

On Saturday, February 24, 2018 at 8:26:44 AM UTC-5, N_Cook wrote:
> another a large BGA chip problem that needed a push.
> Are there indexing marks/arrows etc in the mechanism , in case its
> jumped a tooth?
 
You were lucky. I'm still throwing out all sorts of worthless electronic parts from VCR days. Capstan drive ICs, reel end sensors, smps specific parts, system control parts etc. But we were doing a minimum of 50 per week including those from two pawn shops and several other dealers who only did belts, idler tires and head cleanings.
dansabrservices@yahoo.com: Feb 25 06:26AM -0800

On Sunday, February 25, 2018 at 7:46:12 AM UTC-5, John-Del wrote:
> > Are there indexing marks/arrows etc in the mechanism , in case its
> > jumped a tooth?
 
> You were lucky. I'm still throwing out all sorts of worthless electronic parts from VCR days. Capstan drive ICs, reel end sensors, smps specific parts, system control parts etc. But we were doing a minimum of 50 per week including those from two pawn shops and several other dealers who only did belts, idler tires and head cleanings.
 
Tried to send you a message, but it was rejected. Send me a note at
dansabrservices AT yahoo DOT com
whit3rd <whit3rd@gmail.com>: Feb 24 11:21AM -0800

> Do they sell a gauge to measure Coaxial Power Connectors?
> AKA "barrel connectors".
 
> Someone must have some sort of gauge to measure them....
 
None that I've found. The parts that are hard to measure, I generally just
give up and buy a few score of each nearby size. At a PPOE,
we kept notes on 'hits' when an important failure-prone connector matched
something we could order (didn't happen a lot).
 
If it were time-critical (and I couldn't find a junker adapter to clip a
pigtail from), I've got drill bit shanks down to #60 (~1mm), and modeling
clay, and a measuring microscope. The thing is, even if I DID measure
accurately, the 'nominal' sizes of commercially available mates would
still be a mystery. So, it's easier to keep a divider-box of a dozen sizes
of the males/females, with annotation as to what to reorder.
Phil Allison <pallison49@gmail.com>: Feb 24 03:03PM -0800

olds...@tubes.com wrote:
 
------------------------
> pins inside are near impossible to measure.
 
> There are so many variations of them too.
 
> Someone must have some sort of gauge to measure them....
 
 
** These measure ODs and IDs.
 
https://www.aliexpress.com/item/8-0-200mm-0-02-0-001in-Vernier-caliper-paquimetro-stainless-steel-micrometer-beamcallipers-gauge-measuring/32233906118.html
 
 
 
.... Phil
tabbypurr@gmail.com: Feb 25 01:13AM -0800

On Saturday, 24 February 2018 23:03:26 UTC, Phil Allison wrote:
 
> > Someone must have some sort of gauge to measure them....
 
> ** These measure ODs and IDs.
 
> https://www.aliexpress.com/item/8-0-200mm-0-02-0-001in-Vernier-caliper-paquimetro-stainless-steel-micrometer-beamcallipers-gauge-measuring/32233906118.html
 
but are very inaccurate when measuring small diameter internal holes such as barrel connectors. Try it & you'll see why.
 
 
NT
Fox's Mercantile <jdangus@att.net>: Feb 25 03:21AM -0600

On 2/24/18 5:03 PM, Phil Allison wrote:
> ** These measure ODs and IDs.
 
> https://www.aliexpress.com/item/8-0-200mm-0-02-0-001in-Vernier-caliper-paquimetro-stainless-steel-micrometer-beamcallipers-gauge-measuring/32233906118.html
 
> .... Phil
 
Those are nice.
In addition to the standard vernier calipers, I have the dial type.
So much easier to read.
They are also available now with LCD displays.
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
Fox's Mercantile <jdangus@att.net>: Feb 25 03:24AM -0600

> but are very inaccurate when measuring small diameter internal
> holes such as barrel connectors. Try it & you'll see why.
 
I use a dial caliper. I've never had any problems.
 
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
Phil Allison <pallison49@gmail.com>: Feb 25 02:32AM -0800

Nick Cat wrote:
 
----------------
 
> > https://www.aliexpress.com/item/8-0-200mm-0-02-0-001in-Vernier-caliper-paquimetro-stainless-steel-micrometer-beamcallipers-gauge-measuring/32233906118.html
 
> but are very inaccurate when measuring small diameter internal holes
> such as barrel connectors. Try it & you'll see why.
 
** For accuracy, I use small & PCB drills as feeler gauges.
 
Which had been posted here already....

 
 
 
.... Phil
bleachbot <bleachbot@httrack.com>: Feb 25 12:03AM +0100

bleachbot <bleachbot@httrack.com>: Feb 25 11:32AM +0100

Fox's Mercantile <jdangus@att.net>: Feb 25 03:29AM -0600

On 2/16/18 7:52 AM, Aleksandar Kuktin wrote:
> Well, you are a bigger expert on this than I.
 
One of the problems is using a Magic Jack for one of
the phone lines.
 
From elsewhere:
As to your MJ, then depending on your DAHDI hardware, then
it might not provide an acceptable ring voltage (90v AC 30HZ
expected) less than 30 and it likely wont be recognized as a
legitimate FXO
 
Always something.
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
N_Cook <diverse@tcp.co.uk>: Feb 25 09:03AM

On 24/02/2018 15:37, N_Cook wrote:
> the excess.
> Stayed proper time for 2 hours now, whether it stays un-reset for the
> next week, the longest otherwise, we'll see.
 
It reset during the cold of the night, I'll wedge open the otther 3
buttons, JIC, then get inside 'when' it resets again.
JBI <JBI@ez1.net>: Feb 24 06:26PM -0500

On 02/09/2018 02:35 AM, micky wrote:
 
> 1) If I turn off the radio or gizmo or unplug the flashdrive, it starts
> up again either (where I left off or iirc much more likely) at the start
> of the song or segment I was playing when I stopped the previous time.
 
Just out of curiosity, what is the brand/ model of the device? Been
looking and hoping there'd be something out like this for a while. Does
it auto scan FM stations or do you have to find a clear one manually?
Also, how's the music sound over the FM?
 
In ones I tried years past, they either drifted too much away from the
frequency to be useful, or seriously lacked audio response with the
effect that the music sounded poor. Maybe they've been improved since
then.
kludge@panix.com (Scott Dorsey): Feb 24 12:51PM -0500


>> https://www.hazet.de/produktkatalog/index.php?language=en
 
>> There is a reason why some brands of tools cost more than others...
 
>Extra cost of marketing??
 
Ever seen ads for Hazet, PB, or Proto? Those guys don't advertise
much, because they don't really need to.
 
The people who put money into marketing are the mid-grade outfits like
Snap-On and Mac, who make respectable but not marvelous tools and
make up for that in advertising.
 
>Lots of profits for brand owners?
 
Maybe, but I suspect there's a lot more money selling millions of crappy
tools than hundreds of really nice ones. Harbor Freight is making money
hand over fist, and so are their suppliers. There's not a lot of money
in selling $100 Swiss pattern files, because there are only a limited number
of people who are going to buy them. Vaillorbe makes great tools, and they
might have high margins too, but they aren't making huge profits.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
Ralph Mowery <rmowery28146@earthlink.net>: Feb 24 05:53PM -0500

In article <p6s8n1$c83$1@panix2.panix.com>, kludge@panix.com says...
> in selling $100 Swiss pattern files, because there are only a limited number
> of people who are going to buy them. Vaillorbe makes great tools, and they
> might have high margins too, but they aren't making huge profits.
 
Like a man that started a food chain of stores in the town I live in.
He sold brand name food, same as any other store. Then one day we
marked everythign down. I was a stock boy then around 17 years old. His
idea was to make 10 fast pennies instead of one slow dime. He would by
a boxcar load of an item and put it in his warehouse.
A number of years later the three big names like A&P, Kroger and Winn
Dixie closed and moved out of town. Now there are several of his stores
around in the near by are, and the only other food places are one of
each, Walmart, Audies, and one other store.
 
Many of the Harbor Freight tools are good enough for a one or two time
use. I have some, but would not buy them if I was using them to make a
living.Most of my better tools are the Craftsman tools from years ago.
The latter ones have not been as good of quality.
Fox's Mercantile <jdangus@att.net>: Feb 24 05:21PM -0600

On 2/24/18 4:53 PM, Ralph Mowery wrote:
> Most of my better tools are the Craftsman tools from years ago.
> The latter ones have not been as good of quality.
 
Round 1999-2000 Sears decided to ditch their OEM provider of
Craftsman tools in favor of a cheaper supplier.
They also introduced a new line of "Sears tools" that had mo\lifetime
warranty.
 
Oh, and the original OEM? They now sell tools with a lifetime warranty
through Home Depot. Their name? Husky.
 
And for the first six months, they also offered to honor the warranty on
any Craftsman tools.
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
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