Digest for sci.electronics.repair@googlegroups.com - 14 updates in 3 topics

9:46 AM Penedão
captainvideo462009@gmail.com: Oct 21 07:13PM -0700

This is admittedly off topic but I thought that I would ask. I received this phone call from a guy at the above company Apparently you sign up with this outfit for 345 dollars a year and they say that they will feed you all kinds of leads for work. In my case due to my diversity that will be anything from TV repairs to alarm system installations and both residential and commercial. I don't like the idea of paying for leads that could very well turn into nothing not to mention my fear of this not even being a legitimate outfit. Does anyone know anything about this company? Thanks Lenny
jurb6006@gmail.com: Oct 22 02:40AM -0700

Did you do any preliminary research ? They are part of the same big suit place as Angie's List now, and there are others under the same shell. Founded in 98, changed their name in 012, and now Angie of Angie's list is the big corporation Home Advisor is their subsidiary. The parent is on NASDAQ, netted $10 mil in 015, Home Advisor reports I think 2,000 employees. The parent of the parent is IAC, a REALLY big one.
 
So they are as trustworthy as the phone company...err water works...err the government...err you know,nobody.
 
I looked to residential alarm services and it came up with nothing and bounced me into some house cleaning n shit, yeah, that's the same thing, right ? So they got their brain cell trained, to shit in the basement.
 
They also have some type of "permit pulling" service, you have to give it a zip code before anything. The button next to it says "find a pro", I didn't hit it.
 
Now the downside - you got a cold call from them.
 
If you can spare the money try it but make sure you are not getting into a contract. One year, a buck a day, OK. You get a check, not an automatic payment. It expires UNLESS I RENEW IT AT THE END. No extra for extra listings.
 
And I recommend you record the call.
"pfjw@aol.com" <peterwieck33@gmail.com>: Oct 22 05:34AM -0700

They advertise heavily in southeastern PA, and they have a habit of cold-calling any sort of service contractor to offer their services. Keep in mind that a contractor's number is on no sort of Do Not Call list, so they get away with it.
 
I used their website a few years ago when we were pricing a new roof. I did not give them a phone number, e-mail only. When we started getting prices from South Carolina-based companies and based on Google Earth photos I had some concerns. When I started to read the fine print about warranties (manufacturer only), Permits (I had to get it), Insurance (large additional charge) and local license (I pay), trash removal (tear-off, my dumpster), that was enough. We went with a local licensed, insured roofer with a 30 year reputation, at about the same net cost.
 
If you are busy and have a good reputation, you do not need them. If you are starting out in your trade, they might be useful. But the links they provide are no better than they should be.
 
Peter Wieck
Melrose Park, PA
John-Del <ohger1s@gmail.com>: Oct 22 06:30AM -0700

> This is admittedly off topic but I thought that I would ask. I received this phone call from a guy at the above company Apparently you sign up with this outfit for 345 dollars a year and they say that they will feed you all kinds of leads for work. In my case due to my diversity that will be anything from TV repairs to alarm system installations and both residential and commercial. I don't like the idea of paying for leads that could very well turn into nothing not to mention my fear of this not even being a legitimate outfit. Does anyone know anything about this company? Thanks Lenny
 
I could be wrong, but I think they get paid if they refer someone to you and you don't even get the job. Not sure about Home Advisor, but I do know for a fact that his happened with other trade service referral services.
 
For $350, you'd be far better off advertising in your local bulletin type newspapers as well as building your own web site.
Chuck <ch@dejanews.net>: Oct 22 11:35AM -0500

On Sun, 21 Oct 2018 19:13:28 -0700 (PDT), captainvideo462009@gmail.com
wrote:
 
>This is admittedly off topic but I thought that I would ask. I received this phone call from a guy at the above company Apparently you sign up with this outfit for 345 dollars a year and they say that they will feed you all kinds of leads for work. In my case due to my diversity that will be anything from TV repairs to alarm system installations and both residential and commercial. I don't like the idea of paying for leads that could very well turn into nothing not to mention my fear of this not even being a legitimate outfit. Does anyone know anything about this company? Thanks Lenny
As a consumer,
I tried using them to find a contractor after a semi backed into my
house. In a town of 50000 people, they sent no recommendations. I
wasn't pleased.
etpm@whidbey.com: Oct 21 04:23PM -0700

I have a Tektronix 465B. I bought it used because it was one of the
scopes recommended by folks who post here and on the electronics basic
group. And I know hardly anything about oscilloscopes. It has worked
very well until two days ago. The volts/div switch has one position
where the display gets all wanky. I thinks that's the proper technical
term. When any other position is chosen on the switch the display
works perfectly. In the one bad position the display shows different
types of wankyness as I wiggle the selector knob slightly back and
forth. So I'm thinking about spraying some Deoxit D5 into the switch.
I'll probably need to remove the scope cover to do this. Is this a bad
idea? Is there a better solution?
Thanks,
Eric
Jeff Liebermann <jeffl@cruzio.com>: Oct 21 05:44PM -0700

>idea? Is there a better solution?
>Thanks,
>Eric
 
"Cleaning the Volts/Div Attenuator Switch Contacts in Tektronix 4XX
Oscilloscopes"
<http://fullnet.com/~tomg/tekclean.htm>
 
"Topic: Contact Cleaner and Switch lubricant"
<https://www.eevblog.com/forum/chat/contact-cleaner-and-switch-lubricant/>
 
"Tek 465 Cleaning"
<https://www.raynetrepair.us/tektronix-465/cleaning.html>
The recommendation of using WD-40 is controversial.
 
 
--
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
Fox's Mercantile <jdangus@att.net>: Oct 21 09:30PM -0500

On 10/21/18 7:44 PM, Jeff Liebermann wrote:
> The recommendation of using WD-40 is controversial.
 
I refuse to use WD-40 for anything on equipment other than
removing adhesive residue.
 
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
Jeff Liebermann <jeffl@cruzio.com>: Oct 21 08:42PM -0700

On Sun, 21 Oct 2018 21:30:37 -0500, Fox's Mercantile <jdangus@att.net>
wrote:
 
>> The recommendation of using WD-40 is controversial.
 
>I refuse to use WD-40 for anything on equipment other than
>removing adhesive residue.
 
I use Goof-Off, which is 25% to 50% mineral spirits. My thinking is
anything that stinks that bad must be powerful stuff.
 
Wired Magazine send some WD-40 to a lab to check its composition.
<https://www.wired.com/2009/04/st-whatsinside-6/>
Mineral oil, decane, nonane, tridecane, tetradecane, dimethyl
naphthalene, and cyclohexane. Mostly mineral oil, which is the
primary ingredient of most commercial solvents, cleaners, and
penetrating oils. The others are made from kerosene, naphtha, or
stoddard solvent, which I consider to be fairly similar:
<https://www.cdc.gov/niosh/ipcsneng/neng1381.html>
For example, Caig Deoxit Gold is 75% "oderless mineral spirits":
<https://system.na3.netsuite.com/core/media/media.nl?id=1567&c=ACCT113328&h=b0ad953fc4fc4d2d52cc&_xt=.pdf>
Bottom line: They're all basically the same stuff with a few
additives.
 
All contact cleaners include a mild acid to remove the surface oxides
from the contacts. In the distant past, Cramolin Red contained 95%
naphtha and 5% oleic acid for the purpose. Oleic acid is food safe
which makes it the ideal oxide remover. You can also get it cheap on
eBay if you want to mix your own.
<https://www.ebay.com/sch/i.html?_nkw=oleic+acid>
 
The problem with oleic acid is that it has to be removed after it
strips off the oxides from the contacts or it will eventually corrode
any exposed copper. That caused problems for Caig, so they removed it
from the mix to be replaced with less aggressive oxide strippers.
 
Incidentally, if you also want an organically lubricated and smelling
oscilloscope, a little olive oil, which is 55% to 83% oleic acid,
might be an interesting substitute.
<https://en.wikipedia.org/wiki/Olive_oil#Constituents>
 
 
 
--
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
gregz <zekor@comcast.net>: Oct 22 07:37AM

> idea? Is there a better solution?
> Thanks,
> Eric
 
Some cam switches I think I just used alcohol. I never did, pbut thinking
of lube or cleaner lube, I love CRC 2-26.
 
Greg
jurb6006@gmail.com: Oct 22 02:07AM -0700

Yeah, don't use WD-40 on that. If you really MUST have a lube in there use LPS-2. Then of course give it a squirt of solvent.
 
I don't like ANYTHING about those switches. I understand why they did it but still just don't like them.
 
Good luck with it.
Chris Jones <lugnut808@spam.yahoo.com>: Oct 23 12:01AM +1100

> idea? Is there a better solution?
> Thanks,
> Eric
 
Have a look in the service manual - it is online, or at least the one
for the 475 is, and that is the same construction style.
 
I recall reading that because the contacts are gold, they don't tarnish
and just need the dirt cleaned off, and would not benefit from any oily
residue (as left by many contact cleaner sprays). Also, since they are
open to the ventillation air, any oily residue will make dust stick to
it and bring back the problem sooner than with just a cleaning.
 
I expect that the recommended cleaning solvent is probably some sort of
Freon, but in the absence of that, pure isopropanol is probably ok.
 
The little contact forks that press against the PCB traces are very
delicate, so don't touch them with hard objects unless you know what you
are doing.
 
A problem that I had, with similar symptoms, is that the little
attenuators are socketed, and I had dirty sockets on one of mine.
Pulling out that attenuator and reseating it fixed it - the switches
were not the problem that time.
 
There is a table in the service manual telling you which attenuators are
switched in for which vertical volts/div setting. Using this table and
your observations about the "wankyness" on each range, you could
probably narrow it down to one attenuator, so that you have to mess with
it in the minimum number of places.
Arlen Holder <a%rlenh.older@no.spam.net>: Oct 21 06:39PM

Tutorial to run any Windows command directly on Android over either USB or Wi-Fi
 
When you plug an Android 4.3+ device set up as MTP into Windows over USB,
you can't run Windows commands _directly_ on the Android filesystem (yet).
<http://www.bild.me/bild.php?file=9648761dir.jpg>
 
The goal is for everyone to be able to run any Windows command on the
entire Android filesystem, over USB (because it's fast, secure, & easy) &
over WiFi (because it works over the local network).
 
I've gone in the past couple of days about as far as I can go.
What we need from experts here is your added value to go further.
 
To that end, I summarize below where my knowledge falls off the cliff.
If you know more than I do, please improve these suggestions below.
 
*Goal: Run any Windows command directly on the Android filesystem.*
==========================================
*These worked perfectly in my tests (Android 7.0, Windows 10)*
==========================================
1. MTP over USB: (*MTPDrive*)
<http://www.bild.me/bild.php?file=1853998dir02.jpg>
o Android set to MTP + MTPDrive payware on Windows
o Mount the Android filesystem as a drive letter on Windows
o MTPDrive freeware is limited to 30 files transferred per session
<http://www.bild.me/bild.php?file=8315262dir03.jpg>
Tested with:
MTPDrive <http://mtpdrive.com/download.html>
 
2. MTP over USB: (*Linux*)
<http://www.bild.me/bild.php?file=6181360dir01.jpg>
o Android set to MTP + dual-boot Ubuntu with Windows
o There are no limits whatsoever as to what you can do
Tested with:
Ubuntu 18.04 <https://www.ubuntu.com/download/desktop>
 
3. WebDAV over WiFi: (*net use*)
<http://www.bild.me/bild.php?file=8605173dir05.jpg>
o WebDAV freeware server on Android + "net use" on Windows
o Mount the Android filesystem as a drive letter on Windows
o There are no limits whatsoever as to what you can do
Tested with:
<https://play.google.com/store/apps/details?id=com.theolivetree.webdavserver>
 
4. FTP over WiFi: (*DirectNetDrive*)
<http://www.bild.me/bild.php?file=4731516dir011.jpg>
<http://www.bild.me/bild.php?file=6340420dir012.jpg>
o FTP freeware server on Android + DnD freeware on Windows
o Mount the Android filesystem as a drive letter using DnD freeware
o There are no limits whatsoever as to what you can do
Tested with:
DirectNetDrive <http://www.directnet-drive.net/>
 
5. FTP over WiFi: (*NetDrive 1.3.2.0*)
<http://www.bild.me/bild.php?file=1383190dir014.jpg>
o FTP freeware server on Android + (older) NetDrive freeware on Windows
o Mount the Android filesystem as a drive letter using NetDrive freeware
o There are no limits whatsoever as to what you can do
Tested with:
NetDrive 1.3.2.0 <https://filehippo.com/download_netdrive/12615/>
 
==========================================
*These worked to run commands - but we don't have a mounting solution.*
==========================================
6. MTP over USB: (*libMTP*, libusbK, libiconv)
<http://www.bild.me/bild.php?file=4656598libtmp01.jpg>
o Plug in Android to USB + libMTP commands on Windows
o Can see and manipulate every file on the Android filesystem
o But it can't yet mount the Android filesystem as a drive letter
Tested with:
LibMTP <https://sourceforge.net/projects/libmtp/>
LibusbK <https://sourceforge.net/projects/libusb-win32/>
LibiConv <http://gnuwin32.sourceforge.net/packages/libiconv.htm>
 
==========================================
*These failed miserably in my tests - but they may work for others.*
==========================================
7. FTP over WiFi: (*net use*)
<http://www.bild.me/bild.php?file=8734999ftpshare02.jpg>
o FTP server freeware on Android + "net use" on Windows
o Mount the Android filesystem as a drive letter on Windows
o I can't figure out the doublebackslash syntax to make it work!
Tested with:
<https://play.google.com/store/apps/details?id=com.theolivetree.ftpserver>
 
8. FTP over WiFi: (*FTPuse*)
<http://www.bild.me/bild.php?file=7687244dir06.jpg>
<http://www.bild.me/bild.php?file=7075400dir07.jpg>
<http://www.bild.me/bild.php?file=3316456dir08.jpg>
<http://www.bild.me/bild.php?file=7355568dir09.jpg>
<http://www.bild.me/bild.php?file=4223201dir010.jpg>
o FTP server freeware on Android + FTPuse freeware on Windows
o Mount the Android filesystem as a drive letter using FTPuse freeware
o There are no limits whatsoever as to what you can do
Tested with:
FTPUse <https://www.ferrobackup.com/download/FtpUseInst.exe>
 
9. FTP over WiFi: (*SFTPNetDrive*)
<http://www.bild.me/bild.php?file=2809525dir013.jpg>
o FTP server freeware on Android + SFTPNetDrive freeware on Windows
o Mount the Android filesystem as a drive letter using SFTPNetDrive
o There are no limits whatsoever as to what you can do
Tested with:
SFTP Net Drive <https://www.nsoftware.com/sftp/netdrive/>
 
10. SMB over WiFi: (*net use*)
o SMB server freeware on Android + native Windows "net use"
o Main problem is Android needs to be rooted to use TCP port 445
o Second problem is finding Android SMB server non-root freeware
Tested with:
<https://play.google.com/store/apps/details?id=com.icecoldapps.sambaserver>
 
==========================================
*These were not tested because they are trialware solutions.*
==========================================
11. FTP or WebDAV over WiFi: (*WebDrive*)
o FTP/WebDAV freeware server on Android + WebDrive trialware on Windows
o Mount the Android filesystem as a drive letter using WebDrive trialware
o The trialware is limited to 10 days
Not tested:
WebDrive <https://webdrive.com/download/>
 
12. FTP over WiFi: (*NetDrive*)
o FTP freeware server on Android + (current) NetDrive trialware on Windows
o Mount the Android filesystem as a drive letter using NetDrive trialware
o There are no limits whatsoever as to what you can do
Not tested:
NetDrive 3.6.571 <http://netdrive.net/
==========================================
In summary, we need your added value to get past where I am above.
a. Specifically - do you know the syntax for FTP "net use" mounts?
b. Do you know of an Android nonroot SMB server that works with Windows?
c. And most importantly, do you know of MTPdrive alternative freeware?
 
Above is where I fall off the cliff on trying to help everyone run any
Windows command directly on any Android 4.3+ filesystem over USB or WiFi.
 
As always, the goal is a universal solution for everyone.
If you can add value, please pitch in to improve our capabilities.
--
We are always far stronger together than any of us are all alone.
"pfjw@aol.com" <peterwieck33@gmail.com>: Oct 22 05:22AM -0700

The Troll is back. Please do not feed the troll.
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