Solder braid: width?

Started by aleksa in sci.electronics.basics9 years ago 10 replies

I want to solder one TQFP144, but do not have any experience with anything more than DIP40. This is what I'm planning to do. I will: 1....

I want to solder one TQFP144, but do not have any experience with anything more than DIP40. This is what I'm planning to do. I will: 1. apply some tinnol on all the pins on the PCB 2. remove excess tinnol with dump cloth 3. place the chip and solder it pin by pin with solder iron step 3 will certanly solder several pins together which I plan to fix with solder braid. The question is: ...


Old Solder

Started by Joe in sci.electronics.basics7 years ago 23 replies

A couple of days ago I did a small repair to an electronic timer. It just need a bit of solder to reconnect a wire. I had a devil of a time...

A couple of days ago I did a small repair to an electronic timer. It just need a bit of solder to reconnect a wire. I had a devil of a time with that small repair, the solder just didn't want to flow over the wire and onto the pad on the PCB. A little while later, it occurred to me that maybe the problem was that I had used some old solder - about a foot or so are remaining on probably a...


Using a solder pot

Started by mper...@comcast.net in sci.electronics.basics10 years ago 1 reply

I read a great post about using a solder pot, but had a question. I have a board that requires two components to be placed on the bottom and...

I read a great post about using a solder pot, but had a question. I have a board that requires two components to be placed on the bottom and soldered on the top of the board (an LED and a switch that are panel mounted). Is it possible to temporarily cover those respective holes with something prior to dipping into the solder pot, so those holes do not fill up with solder? Thanks, Mike ...


Newbie here looking for recommendation on what solder paste to get?

Started by www.jrdtech.net in sci.electronics.basics10 years ago 2 replies

I'm looking for a solder paste with flux to fix a chip on my laptop motherboard. (don't worry I have a few older 486 motherboard I'm going to...

I'm looking for a solder paste with flux to fix a chip on my laptop motherboard. (don't worry I have a few older 486 motherboard I'm going to practice on b4 I attempt anything). Also what kinda of soldering braid should I get? 1 other question, looking on the internet about SMT some people recommend just using a Flux pen and no solder paste why is this? Maybe I'll get a solder paste with...


Solder Station Recommendations?

Started by Joe in sci.electronics.basics10 years ago 26 replies

I used to have an Edsyn solder station that I bought from Radio Shack about 5 or 6 years ago for around $50.00. It got lost in my...

I used to have an Edsyn solder station that I bought from Radio Shack about 5 or 6 years ago for around $50.00. It got lost in my cross-country move. I'd like to get something of similar quality and not spend more than around $50 or $60. At most I solder maybe 200 connections in a year. I also have a soldering "gun" for heavier soldering, so the one I'm looking for will be for compon...


Tinning a Soldering Iron Tip

Started by behi...@xemaps.com in sci.electronics.basics6 years ago 19 replies

Just beginning to learn soldering, and have gotten in the habit of tinning the tip with fresh solder. I have a Weller 40W and a Weller 35W...

Just beginning to learn soldering, and have gotten in the habit of tinning the tip with fresh solder. I have a Weller 40W and a Weller 35W (grounded) constant-temperature iron with conical tips. I have a lot of trouble with getting solder on these tips, and I believe neither tip is heavily used or abused (no filing or sanding). Solder would just blob up and drip to the floor or tab...


Re: soldering to nichrome wire

Started by John Popelish in sci.electronics.basics11 years ago 19 replies

Joe wrote: > I am trying to solder copper wire (tinned) to nichrome ribbon (more like > wire, but wider), which I took from an old toaster....

Joe wrote: > I am trying to solder copper wire (tinned) to nichrome ribbon (more like > wire, but wider), which I took from an old toaster. The nichrome ribbon > doesn't seem to like the solder. Is there a trick to this? Or should I be > doing something to the nichrome before I try to solder it? On the toaster I > dismantled, I noticed it was soldered to some thick copper conductors, so I


Soldering Fumes

Started by redbrickhat in sci.electronics.basics11 years ago 18 replies

Questions: A) What is the best respirator to use for solder fumes: one for particles/dust/fumes or one with a chemical filter? B)...

Questions: A) What is the best respirator to use for solder fumes: one for particles/dust/fumes or one with a chemical filter? B) What is the best solder vent exhaust system for home users? Thank you.


Re: Can nichrome be soldered?

Started by C. Nick Kruzer in sci.electronics.basics9 years ago 3 replies

Hi John, C. Nick Kruzer wrote: > Can nichrome be soldered to nichrome? > Can nichrome be soldered to copper? John: > Ordinary...

Hi John, C. Nick Kruzer wrote: > Can nichrome be soldered to nichrome? > Can nichrome be soldered to copper? John: > Ordinary silver solder will bond to both metals. > But you have to keep the soldered joint well > below the softening temperature of the solder > for the joint to last. Thanks for the the excellent soldering tips. I've used silver solder for putting together copper p


Tools for desoldering?

Started by Hamad bin Turki al Salami in sci.electronics.basics11 years ago 19 replies

I'm not very skilled with soldering but I have a bunch of components I need to replace. I have a solder pump and copper wick. I can get the job...

I'm not very skilled with soldering but I have a bunch of components I need to replace. I have a solder pump and copper wick. I can get the job done with these, but it's slow work. Maybe with more practice I'd improve, but as it stands, I end up using the pump 3 or 4 or more times before I get most of the solder up. I'm not too successful with the wick at all. So I'm considering buying som...


Solder flux and resistance

Started by George Herold in sci.electronics.basics7 years ago 6 replies

When testing a high impedance board (up to 1 G ohm) I found that the SMD 0805 10 Meg ohm resistors measured only 6 meg ohm. The problem was...

When testing a high impedance board (up to 1 G ohm) I found that the SMD 0805 10 Meg ohm resistors measured only 6 meg ohm. The problem was traced back to the liquid flux used with Rohs solder. (100 Meg and 1 G resistors are through hole and measured correctly.) I then wanted to measure the resistance of different =91flux blobs=92. I made big solder blobs on 0805 SMD pads (spacing bet...


Which solder?

Started by creek in sci.electronics.basics9 years ago 12 replies

I tried Kester "245" No-clean solder but sometimes end up with the conductive white residue problem from the moisture that is present in our...

I tried Kester "245" No-clean solder but sometimes end up with the conductive white residue problem from the moisture that is present in our environment. I'll often poly-coat this to block the moisture and it seems to work OK but I don't think this is suggested. Other times we pot this in epoxy but I worry about moisure migration down the wires, I dont want failures 2 years from now. I t...


How do you solder this?

Started by David Eather in sci.electronics.basics3 years ago 15 replies

I found this chip: http://www.ti.com/product/TPS60212 that will do all I need - step up 2v to 3.3v, very low quiescent current and a...

I found this chip: http://www.ti.com/product/TPS60212 that will do all I need - step up 2v to 3.3v, very low quiescent current and a small package. Unfortunately it is far too small a package - a VSSOP with a pin spacing of 0.5mm. Does anyone have some tips on how to hand solder this flyspec of an IC? I do SOIC, SOT23 and 0805 easily but this thing beats me. I did find a sim...


Cannot remove caps from motherboard

Started by Anonymous in sci.electronics.basics5 years ago 20 replies

I'm trying to repair my MSI motherboard by replacing the caps near the regulators since they are bulging and are most likely defective....

I'm trying to repair my MSI motherboard by replacing the caps near the regulators since they are bulging and are most likely defective. However, even at the highest setting of my soldering iron (480 degrees Celcius) I'm unable to liquify the solder. I don't know what kind of solder they're using for motherboards but it's obviously not the kind you can easily manipulate with common DIY to...


Question about cabling:

Started by Brotherwarren in sci.electronics.basics9 years ago 8 replies

Hi folks: Is it possible to solder 15-pin D-Suub connector onto a cable? I have to pass a VGA display cable through a wall. To get...

Hi folks: Is it possible to solder 15-pin D-Suub connector onto a cable? I have to pass a VGA display cable through a wall. To get the connector through I'd have to drill a hole 1inch in diameter. Instead what I'd like to do is pass a narrow cable through, then solder the connector on once it reaches the other side. Is this advisable/possible? I thinbk I've found the cable and co...


Stiff wire (not copper?), how to repair/reconnect?

Started by redbelly in sci.electronics.basics10 years ago 8 replies

I am trying to reattach 2 broken wires on one side of a pair of headphones, but normal solder is not working. When I scraped off the...

I am trying to reattach 2 broken wires on one side of a pair of headphones, but normal solder is not working. When I scraped off the insulation from the wires, I noticed that the metal is really really stiff and brittle (though I was able to bend it without breaking), very unlike copper. Tried soldering it to reattach it anyway, but the solder didn't stick. (FWIW, I used rosin-core 60/40...


Unsolderable wire?

Started by Bob E. in sci.electronics.basics2 years ago 67 replies

I am trying to solder some RG-6 shield to a pcb. The braid won't tin. It's almost like it's dissipating the heat faster than I can apply it....

I am trying to solder some RG-6 shield to a pcb. The braid won't tin. It's almost like it's dissipating the heat faster than I can apply it. With both a temp-controlled iron (set as high as 700F) and a mondo 100W stick I finally tried. The solder will barely melt when touched to the braid opposite the iron. I've applied some Kester rosin paste flux as well using my trusty Kester 60/4...


Curiosity

Started by Periproct in sci.electronics.basics8 years ago 2 replies

Just curious here. I managed to break the tiny coaxial connector on my express card TV tuner. Decided to remove the connector from the PCB,...

Just curious here. I managed to break the tiny coaxial connector on my express card TV tuner. Decided to remove the connector from the PCB, cut the small coaxial plug off the supplied lead and solder it directly to PCB. Having got the connector off the PCB I checked for shorts with a multimeter and got 1.1 ohms. Couldn't see any solder shorts so thought maybe I'd overheated a component...


How to solder BGA chips without room for glue onto both sides of a PCB?

Started by Markus Zingg in sci.electronics.basics11 years ago 15 replies

I wonder how one can solder BGA devices to both sides of a PCB like they use it i.e. with DDR2 modules. The chips used there have no room left...

I wonder how one can solder BGA devices to both sides of a PCB like they use it i.e. with DDR2 modules. The chips used there have no room left on their bottom side where one could apply glue - so how is it done? TIA Markus


Soldering 550m of copper wire

Started by Goran in sci.electronics.basics4 years ago 46 replies

I have to solder 550 - 600m of 1mm copper wire. Wire must be completely covered with solder. It will take some time to do this on regular...

I have to solder 550 - 600m of 1mm copper wire. Wire must be completely covered with solder. It will take some time to do this on regular basis ( with soldering iron ) so i was thinking to make some kind of slot in some aluminium housing and melt the lead alloy in it. Then i can put the wire in it and draw it slowly throe this slot. Additionally i can set some stepper motor on the othe...