Digest for sci.electronics.repair@googlegroups.com - 15 updates in 4 topics

mhooker32@gmail.com: Jul 12 08:29AM -0700

On Tuesday, July 11, 2017 at 11:38:23 AM UTC-4, rickman wrote:
> clearly visible when the deflection collapses.
 
> --
 
> Rick C
 
i put a probe on pin 4 of LA7851, the vertical deflector ic chip. its a pulse from the AFC terminal on the flyback. there is virtually no pulse, just a half volt . from the flyback afc terminal, i get a 90 volt shape that looks like a half rectified sine wave, just the top of the sine wave. 90 volt seems low. i think there has to be a pulse at pin 4 for the IC to operate. i bought a working chassis on ebay, and will check some pins outputs, i dont want to give up now.
Bram van den Heuvel <braam456987@yahoo.com>: Jul 11 06:30PM

Given <news:10t9mcpu5rmiqvsh96qq9t5d42v14nm45m@4ax.com>, Char Jackson
 
> Agreed, those are your wireless and wired interfaces, respectively, so
> you're interested in interface 13 (WiFi) and interface 12 (wired). Just
> ignore the rest for now.
 
Thanks for confirming that these are the two lines of interest.
12...00 26 55 d9 e3 44 ......Realtek PCIe GBE Family Controller
13...c4 e9 84 a1 4c aa ......TP-LINK Wireless USB Adapter
 
Given that interface "12" is the antenna connected to the Ethernet port,
and interface "13" is the dongle connected to the USB port, I'll try this
next to force the connection to go to Ethernet (but I'll send this first in
case I destroy my network ... don't laugh ... I've screwed up before).
 
FORCE ETHERNET ANTENNA:
netsh interface ipv4 set interface 12 metric=25
netsh interface ipv4 set interface 13 metric=50
 
FORCE USB ANTENNA:
netsh interface ipv4 set interface 12 metric=50
netsh interface ipv4 set interface 13 metric=25
 
RETURN TO AUTOMATIC:
netsh interface ipv4 set interface 12 metric=automatic
netsh interface ipv4 set interface 13 metric=automatic
 
Before I screw with my network, how does that sound as a plan?
Bram van den Heuvel <braam456987@yahoo.com>: Jul 11 06:40PM

Given <news:esjl82FpmlgU1@mid.individual.net>, Andy Burns
> ethernet, create a bridge of the two NICs, and let the IP address get
> assigned to the bridge, rather than having IP addresses assigned to each
> individual NIC.
 
Just to be clear, there is no "wired Ethernet" in this desktop computer.
 
There is no WiFi card.
There is an Ethernet port and USB ports.
 
So the USB 802.11n dongle is in the USB port.
And a radio and antenna is connected to the Ethernet port.
 
The computer doesn't know that the Ethernet port isn't a wired connection
though, so, maybe that distinction that it's not "really" Ethernet, doesn't
matter.
Bram van den Heuvel <braam456987@yahoo.com>: Jul 11 06:45PM

Given <news:ok2ini$tum$1@dont-email.me>, lifewoutmilk
 
> Set-NetIPInterface -InterfaceIndex INDEX -InterfaceMetric VALUE
 
> To get the INDEX for the adapter, run 'Get-NetAdapter' and look at the
> ifIndex column.
 
I do not understand what a "power shell" is.
I do understand what a "command line" is, so the "netsh" commands working
at a command line make sense to me.
 
But how do I get to a "power shell command line"?
Googling, I found out I can do this:
Start -> Run -> powershell
But is that an "admin" power shell?
 
I really don't understand at all why a second command line even exists.
Can you give me a sentence or two on why I would use powershell over the
command line?
Char Jackson <none@none.invalid>: Jul 11 05:42PM -0500

On Tue, 11 Jul 2017 18:30:03 +0000 (UTC), Bram van den Heuvel
>netsh interface ipv4 set interface 12 metric=automatic
>netsh interface ipv4 set interface 13 metric=automatic
 
>Before I screw with my network, how does that sound as a plan?
 
If the current metrics are all above 50, I think you're fine. Otherwise,
I'd bring the values down.
"pfjw@aol.com" <pfjw@aol.com>: Jul 11 05:45PM -0700

Please do not feed the Troll. This troll posts _only_ those questions to which he already knows the answer, and only to get attention.
lifewoutmilk <lifewoutmilk@distraction.x10host.com>: Jul 11 06:10PM -0700

Bram van den Heuvel wrote on 7/11/2017 11:45 AM:
 
> I really don't understand at all why a second command line even exists.
> Can you give me a sentence or two on why I would use powershell over the
> command line?
 
It's more consistent than the command line and related utilities in
Windows for one. Also, instead of manipulating text output, PowerShell
handles objects. So for instance, a pipe command:
 
Get-NetAdapter | where {$_.Name -eq 'Ethernet'}
 
Unlike cmd.exe the output from Get-NetAdapter is a list of objects, not
just a bunch of text output. The default output from the above command
would be a table, however, because the output is an object, you can do
something like:
 
Get-NetAdapter | where {$_.Name -eq 'Ethernet'} | fl
 
Which gives the same output but in a list format instead. (The 'fl' is
an alias for Format-List.)
 
Some of Microsoft's own GUI tools are actually running PowerShell behind
the scenes (Active Directory Administration Tool for example). Well
worth learning in my opinion.
"petrus bitbyter" <petrus.bitbyter@hotmail.com>: Jul 12 04:52PM +0200

"Keith Nuttle" schreef in bericht news:ok2eqk$knk$1@gioia.aioe.org...
 
On 7/10/2017 10:14 PM, Bram van den Heuvel wrote:
 
> My two questions are
> 1. How does Windows automatically decide which to use?
> 2. How do I manually switch from one to the other?
 
I am not sure exactly what you are trying to accomplish. What you are
asking sort of makes sense if you have a laptop that you take different
places.
 
On my desktop computer I have both Ethernet and wireless connections. As
stated Windows 10 picks the fastest connections.
 
The easiest way to change the connections manually is:
 
Right click the MSIcon on the lower left of the tool bar;
 
Click Network Connections;
 
click Changed Adapters Options;
 
Enable which ever adapter you wish to use.
 
In three click you can change your adapter.
 
--
2017: The year we lean to play the great game of Euchre
 
 
MSIcon? Don't see it on my toolbar.
amdx <nojunk@knology.net>: Jul 11 12:12PM -0500

On 7/8/2017 2:38 PM, amdx wrote:
> take over my repairs, (I made the most money at the shop), but by the
> next year when I visited he said he was only coming in 3 days a week,
> and had another job.
 
I got my original PCB back. My only hope is a plea for fairness and
honesty I sent to the buyer. I sent pointing out I sent a working pcb
and he had probably found out by now the inverter pcb was not the
problem with his customers TV, and I didn't think it was fair for him to
use me as source of troubleshooting parts. I ask him to pay the shipping
cost, I'm waiting for a response.
I know fat chance, but I would comply with that request, if I found I
was in error about the troubleshooting.
Mikek
"pfjw@aol.com" <pfjw@aol.com>: Jul 11 10:57AM -0700

I find that "All sales final" is an excellent remedy against frivolous purchases. But, then, I have not sold anything on eBay for some years now. What with Kutztown and specialized groups, that need has been greatly reduced.
 
Peter Wieck
Melrose Park, PA
John-Del <ohger1s@gmail.com>: Jul 12 04:50AM -0700

> I find that "All sales final" is an excellent remedy against frivolous purchases. But, then, I have not sold anything on eBay for some years now. What with Kutztown and specialized groups, that need has been greatly reduced.
 
> Peter Wieck
> Melrose Park, PA
 
 
 
There are ebay vendors who sell parts with a no return policy, but I understand that there's still warranty protection through ebay/paypal if the part is wrong or defective. Supposedly, the ebay seller fees are higher if you sell a part with no return, but like you, I haven't sold anything on ebay for years.
Cursitor Doom <curd@notformail.com>: Jul 11 06:55PM

On Mon, 10 Jul 2017 19:06:55 +0100, Tom Gardner wrote:
 
> a diode, an ideal capacitor for smoothing, an ideal resistor for the
> load, and an ideal resistor in series with the smoothing capacitor
> representing the smoothing cap's ESR.
 
You achieved full-wave rectification using just the above parts? May we
see this remarkable circuit, please?
Tom Gardner <spamjunk@blueyonder.co.uk>: Jul 11 09:11PM +0100

On 11/07/17 19:55, Cursitor Doom wrote:
>> representing the smoothing cap's ESR.
 
> You achieved full-wave rectification using just the above parts? May we
> see this remarkable circuit, please?
 
Half wave rectification is sufficient to show your waveform.
 
Why do you think full-wave rectification is important? Which
*significant* aspect of your waveform would it change?
Cursitor Doom <curd@notformail.com>: Jul 11 08:57PM

On Tue, 11 Jul 2017 21:11:46 +0100, Tom Gardner wrote:
 
> Half wave rectification is sufficient to show your waveform.
 
> Why do you think full-wave rectification is important? Which
> *significant* aspect of your waveform would it change?
 
I'd KF'd you previously due to your politics, but it seems your
electronics is no better.
 
<*PLONK!*>
"Tim Williams" <tiwill@seventransistorlabs.com>: Jul 11 06:53PM -0500

"Cursitor Doom" <curd@notformail.com> wrote in message
news:ok3e3e$bke$13@dont-email.me...
 
> I'd KF'd you previously due to your politics, but it seems your
> electronics is no better.
 
> <*PLONK!*>
 
For the record, you didn't answer his question. I'm genuinely curious now,
too.
 
Tim
 
--
Seven Transistor Labs, LLC
Electrical Engineering Consultation and Contract Design
Website: http://seventransistorlabs.com
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