sci.electronics.repair@googlegroups.com

Google Groups

jurb6006@gmail.com: Oct 22 11:29PM -0700 Actually I did that kinda wrong. It is not bad per se, but the right way is -   Version 4 SHEET 1 880 680 WIRE 352 64 208 64 WIRE 608 64 352 64 WIRE 688 64 608 64 WIRE 208 96 208 64 WIRE 352 96 352 64 WIRE 608 96 608 64 WIRE 208 176 208 160 WIRE 208 176 -16 176 WIRE 208 208 208 176 WIRE 352 208 352 160 WIRE 416 208 352 208 WIRE 608 208 496 208 WIRE 608 208 608 160 WIRE 32 240 -16 240 WIRE 608 256 608 208 WIRE 32 304 32 240 WIRE 416 304 416 208 WIRE 416 304 32 304 WIRE 208 320 208 272 WIRE 352 320 352 272 WIRE 352 320 208 320 WIRE 608 320 352 320 WIRE 688 320 608 320 WIRE 0 0 0 0 SYMBOL diode 224 272 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMBOL diode 368 272 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMBOL diode 368 160 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D3 SYMBOL diode 224 160 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D4 SYMBOL sw 512 208 R90 SYMATTR InstName S1 SYMBOL cap 592 96 R0 SYMATTR InstName C2 SYMBOL cap 592 256 R0 SYMATTR InstName C1 TEXT -128 208 Left 2 ;AC input TEXT 680 192 Left 2 ;DC output TEXT 368 136 Left 2 ;closed for doubler TEXT 40 288 Left 2 ;neutral TEXT 40 152 Left 2 ;hot

bruce2bowser@gmail.com: Oct 22 07:01PM -0700 > wire an outlet box with a duplex outlet and a switch.   > wire the outlet so the two outlets are in SERIES and in series with the switch..   > Plug your unit into one outlet and plug a 100 Watt INCANDESCENT light into the other outlet.   I wonder what it takes for a guy to find a house where all the 120v outlets are wired like that.

jurb6006@gmail.com: Oct 22 08:29PM -0700 > > wire the outlet so the two outlets are in SERIES and in series with the switch..   > > Plug your unit into one outlet and plug a 100 Watt INCANDESCENT light into the other outlet.   > I wonder what it takes for a guy to find a house where all the 120v outlets are wired like that.   Make sure there is a plug on it, do not wire it to the house wiring. Very against code.

dansabrservices@yahoo.com: Oct 22 10:07AM -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 have been contacted as well. In my case, I have restricted the "leads" to electronics repair only. I have not yet completed a contract with them as I am trying to have them filter the leads a bit. I don't want to pay for a lead that I can state in 20 seconds will not turn into anything. As an example, I repair flat screen TVs (at the component level), so there is profit here. But... If the screen is physically broken, there is no reason to waste my time or that of the customer. Even if the panel is available, its replacement will exceed the cost of a complete replacement TV. I am trying to get HA to pre-screen these leads so as not to waste my time nor to cost me the per-lead charge.   No definitive agreement yet...   Dan

bruce2bowser@gmail.com: Oct 22 07:04PM -0700 > 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 heard their commercial on the radio. It plays to the tune 'Halleluya", right?

jjh <jjhudak@gmail.com>: Oct 22 10:45AM -0700 > idea? Is there a better solution? > Thanks, > Eric   Depending on the switch type, I use the following 'contact cleaners' from: Caig - Deoxit CRC contact cleaner Chemtronics contact cleaner, cleaner&lube LPS products   I will never let WD40 near any of my electronic stuff or mechanical stuff. Come to think of it, I don't let it near anything I work on.   For Tek scopes of that vintage, where lube is used, the original lube has dried out. After cleaning (to remove the dirt & oxidation, as well as the old lube), it is recommended to relube it. Its been a while since I did this and don't remember what I used, but IIRC, the Tek SM cited the product.   There is a tek scope NG. If you post your question on there, I am sure you will get excellent pointers. Good luck J

etpm@whidbey.com: Oct 22 12:12PM -0700 Thanks everyone for the replies regarding the cleaning of the switch contacts. I knew you all would come through with good info. Thanks Jeff especially for the links about cleaning these exact switches. I figured they would just be some sort of rotary switch. But they are more complex and take special care. Now that I have the info I am gonna use it to get the switching working correctly. And to avoid the rush I'll clean all the other switch contacts too. I guess a machine shop with oil mist in the air is not the best place for the scope to be stored. Who knew? I'll have to put it in the separate office. Eric

Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Oct 22 04:35PM -0400 On 10/21/18 11:42 PM, Jeff Liebermann wrote: >> 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.   Goof-off has n-methyl 2-pyrrolidone (NMP) in it, and that stuff goes through your skin super fast. It's not especially dangerous as organic solvents go, but still it's best to wear gloves.   Cheers   Phil Hobbs     -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510   http://electrooptical.net http://hobbs-eo.com

Jeff Liebermann <jeffl@cruzio.com>: Oct 22 04:32PM -0700 On Mon, 22 Oct 2018 16:35:54 -0400, Phil Hobbs   >Goof-off has n-methyl 2-pyrrolidone (NMP) in it, and that stuff goes >through your skin super fast. It's not especially dangerous as organic >solvents go, but still it's best to wear gloves.   Sorta, kinda, maybe. Goof-Off is the brand name, which includes a variety of products: <https://goofoffproducts.com/products/> I should have been more specific. I use Goof Off Gunk and Adhesive Remover: https://goofoffproducts.com/product/gunk-adhesive-remover-12-oz/ I use it for removing labels, not for cleaning switch contacts.   The MSDS shows no sign of NMP but does contain oleic acid, ethanol, ethylene glycol (anti-freeze), ether, limonene, and benzyl alcohol. <https://goofoffproducts.com/wp-content/uploads/2017/08/GunkAdhesiveRemoverMSDS.pdf> One of these is probably as bad as NMP because when I use it without gloves, my hand still reek from the stuff and feel oily hours later, even if I wash my hands several times. I've also ruined at least two computer keyboards when the solvents removed the white lettering from the keycaps, even though I thought I had thoroughly washed my hands.   Goof-Off does make one product with NMP. Their Pro Stength Super Glue Remover contains NMP: <https://goofoffproducts.com/product/pro-strength-super-glue-remover-4-oz/> <https://goofoffproducts.com/wp-content/uploads/2017/08/ProStrengthSuperGlueRemoverMSDS.pdf> There might be other Goof-Off products that use NMP, but I didn't feel like going through all the MSDS documents.   An EPA report on NMP use, mfg, distribution, processing, disposal, etc. See Pg 3 through 13 for other products that contain NMP: <https://www.epa.gov/sites/production/files/2017-02/documents/nmp.pdf>   As you mention, it doesn't appear to be very toxic: <https://en.wikipedia.org/wiki/N-Methyl-2-pyrrolidone> <https://www.epa.gov/sites/production/files/2015-04/documents/methyl.pdf>   -- 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

You received this digest because you're subscribed to updates for this group. You can change your settings on the group membership page. To unsubscribe from this group and stop receiving emails from it send an email to sci.electronics.repair+unsubscribe@googlegroups.com.