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surface mount soldering..
can anyone recommend at diy way of flow soldering surface mount components??
i ask as making somr boards up that are totally sm, and well i am going blind trying to solder them using iron!! thanks g0zen.. |
"zindazenda" wrote in message
... can anyone recommend at diy way of flow soldering surface mount components?? i ask as making somr boards up that are totally sm, and well i am going blind trying to solder them using iron!! thanks g0zen.. If you're careful and have the luxury of a little practice to build technique, you can use a heat gun (hot air) to reflow solder SMT parts, but it takes solder paste rather than wire solder (which requires some care in handling and storage), and it does take practice to get the feel for your particular heat gun and develop the technique to get the best results. Another technique is the "toaster oven method" ... search the Yahoo groups for "ez-bake" for a message thread with a wealth of information. 73, Carl - wk3c |
"zindazenda" wrote in message
... can anyone recommend at diy way of flow soldering surface mount components?? i ask as making somr boards up that are totally sm, and well i am going blind trying to solder them using iron!! thanks g0zen.. If you're careful and have the luxury of a little practice to build technique, you can use a heat gun (hot air) to reflow solder SMT parts, but it takes solder paste rather than wire solder (which requires some care in handling and storage), and it does take practice to get the feel for your particular heat gun and develop the technique to get the best results. Another technique is the "toaster oven method" ... search the Yahoo groups for "ez-bake" for a message thread with a wealth of information. 73, Carl - wk3c |
"zindazenda" wrote in message
... can anyone recommend at diy way of flow soldering surface mount components?? i ask as making somr boards up that are totally sm, and well i am going blind trying to solder them using iron!! thanks g0zen.. Here is a link for the "Ez-bake" approach to soldering. http://www.seattlerobotics.org/encod...6/oven_art.htm gb |
"zindazenda" wrote in message
... can anyone recommend at diy way of flow soldering surface mount components?? i ask as making somr boards up that are totally sm, and well i am going blind trying to solder them using iron!! thanks g0zen.. Here is a link for the "Ez-bake" approach to soldering. http://www.seattlerobotics.org/encod...6/oven_art.htm gb |
interesting????!!
will investigate more.. question..how do you put 100 sm parts on board and get it to oven???does the water based solder act as glue till it melts?? simon "G.Beat" wrote in message news:yhPic.30933$aQ6.1632419@attbi_s51... "zindazenda" wrote in message ... can anyone recommend at diy way of flow soldering surface mount components?? i ask as making somr boards up that are totally sm, and well i am going blind trying to solder them using iron!! thanks g0zen.. Here is a link for the "Ez-bake" approach to soldering. http://www.seattlerobotics.org/encod...6/oven_art.htm gb |
interesting????!!
will investigate more.. question..how do you put 100 sm parts on board and get it to oven???does the water based solder act as glue till it melts?? simon "G.Beat" wrote in message news:yhPic.30933$aQ6.1632419@attbi_s51... "zindazenda" wrote in message ... can anyone recommend at diy way of flow soldering surface mount components?? i ask as making somr boards up that are totally sm, and well i am going blind trying to solder them using iron!! thanks g0zen.. Here is a link for the "Ez-bake" approach to soldering. http://www.seattlerobotics.org/encod...6/oven_art.htm gb |
"G.Beat" wrote in message news:yhPic.30933$aQ6.1632419@attbi_s51... "zindazenda" wrote in message ... can anyone recommend at diy way of flow soldering surface mount components?? i ask as making somr boards up that are totally sm, and well i am going blind trying to solder them using iron!! Here is a link for the "Ez-bake" approach to soldering. http://www.seattlerobotics.org/encod...6/oven_art.htm That looks like a good way to go, it would sure beat trying to solder individual leads, but... it looks like the minimum order quantity is 10 tubes of solder, for $120 or so. (And these are the small 35g tubes. Digikey's are more like $800 for the minimum qty of 500g tubes.) Anyone know a source for small quantity (1-3 tubes) purchases? - 73 Bob W7OV |
"G.Beat" wrote in message news:yhPic.30933$aQ6.1632419@attbi_s51... "zindazenda" wrote in message ... can anyone recommend at diy way of flow soldering surface mount components?? i ask as making somr boards up that are totally sm, and well i am going blind trying to solder them using iron!! Here is a link for the "Ez-bake" approach to soldering. http://www.seattlerobotics.org/encod...6/oven_art.htm That looks like a good way to go, it would sure beat trying to solder individual leads, but... it looks like the minimum order quantity is 10 tubes of solder, for $120 or so. (And these are the small 35g tubes. Digikey's are more like $800 for the minimum qty of 500g tubes.) Anyone know a source for small quantity (1-3 tubes) purchases? - 73 Bob W7OV |
What I have done in the past is to tin the pads where the parts are going
to be mounted and then I use two soldering irons. One on each pad and it pulls the part right down into a good position. Ok ok I hear the question now. What about parts with more than two leads? That is a valid and good question. Only tin two pads for that part and use the soldering iron on each one of the pads to get the part mounted and in position to finish soldering the rest of the leads one at a time. |
What I have done in the past is to tin the pads where the parts are going
to be mounted and then I use two soldering irons. One on each pad and it pulls the part right down into a good position. Ok ok I hear the question now. What about parts with more than two leads? That is a valid and good question. Only tin two pads for that part and use the soldering iron on each one of the pads to get the part mounted and in position to finish soldering the rest of the leads one at a time. |
no..on investugation this looks well abit crap..i cant see how it is going
to work with 100 sm 0805 components.. so anyother ideas.. can one buy flow soldering equipment s/h??? g0zen.. "Allan Butler" wrote in message news:ALRjc.5600$Rd4.566539@attbi_s51... What I have done in the past is to tin the pads where the parts are going to be mounted and then I use two soldering irons. One on each pad and it pulls the part right down into a good position. Ok ok I hear the question now. What about parts with more than two leads? That is a valid and good question. Only tin two pads for that part and use the soldering iron on each one of the pads to get the part mounted and in position to finish soldering the rest of the leads one at a time. |
no..on investugation this looks well abit crap..i cant see how it is going
to work with 100 sm 0805 components.. so anyother ideas.. can one buy flow soldering equipment s/h??? g0zen.. "Allan Butler" wrote in message news:ALRjc.5600$Rd4.566539@attbi_s51... What I have done in the past is to tin the pads where the parts are going to be mounted and then I use two soldering irons. One on each pad and it pulls the part right down into a good position. Ok ok I hear the question now. What about parts with more than two leads? That is a valid and good question. Only tin two pads for that part and use the soldering iron on each one of the pads to get the part mounted and in position to finish soldering the rest of the leads one at a time. |
"zindazenda" wrote in message ... "Allan Butler" wrote in message news:ALRjc.5600$Rd4.566539@attbi_s51... What I have done in the past is to tin the pads where the parts are going to be mounted and then I use two soldering irons. One on each pad and it pulls the part right down into a good position. Ok ok I hear the question now. What about parts with more than two leads? That is a valid and good question. Only tin two pads for that part and use the soldering iron on each one of the pads to get the part mounted and in position to finish soldering the rest of the leads one at a time. no..on investugation this looks well abit crap..i cant see how it is going to work with 100 sm 0805 components.. so anyother ideas.. can one buy flow soldering equipment s/h??? g0zen.. Actually, for the occasional prototype, the two-iron method, while a bit tedious, works. (and while 0402 parts are a bit of a bear, even with my aging vision I can handle 0805's and 0603's with this method ... but it takes time and patience and I don't like to do a *lot* of parts that way) You can also, with a bit of practice and care, use a "heat gun" to reflow boards if you don't envision doing enough of it to justify the cost of "real" reflow equipment. I purchased a very nice and effective hot-air system for about $350 new on e-bay (search on "reflow" - the brand I bought is "ATTEN" and it's distributed by a company called "smtpros" if I recall correctly) ... and I've also purchased a toaster oven for the "ez-bake" method ... do a search on Google or Yahoo and you will find a Yahoo group on "ez-bake" with a long thread of useful and informative discussion and hints. Remember, for reflow you need solder *paste* ... available from a number of sources on the web. I prefer the "no clean flux" kind, though I usually clean the boards afterwards anyway ... 73, Carl - wk3c |
"zindazenda" wrote in message ... "Allan Butler" wrote in message news:ALRjc.5600$Rd4.566539@attbi_s51... What I have done in the past is to tin the pads where the parts are going to be mounted and then I use two soldering irons. One on each pad and it pulls the part right down into a good position. Ok ok I hear the question now. What about parts with more than two leads? That is a valid and good question. Only tin two pads for that part and use the soldering iron on each one of the pads to get the part mounted and in position to finish soldering the rest of the leads one at a time. no..on investugation this looks well abit crap..i cant see how it is going to work with 100 sm 0805 components.. so anyother ideas.. can one buy flow soldering equipment s/h??? g0zen.. Actually, for the occasional prototype, the two-iron method, while a bit tedious, works. (and while 0402 parts are a bit of a bear, even with my aging vision I can handle 0805's and 0603's with this method ... but it takes time and patience and I don't like to do a *lot* of parts that way) You can also, with a bit of practice and care, use a "heat gun" to reflow boards if you don't envision doing enough of it to justify the cost of "real" reflow equipment. I purchased a very nice and effective hot-air system for about $350 new on e-bay (search on "reflow" - the brand I bought is "ATTEN" and it's distributed by a company called "smtpros" if I recall correctly) ... and I've also purchased a toaster oven for the "ez-bake" method ... do a search on Google or Yahoo and you will find a Yahoo group on "ez-bake" with a long thread of useful and informative discussion and hints. Remember, for reflow you need solder *paste* ... available from a number of sources on the web. I prefer the "no clean flux" kind, though I usually clean the boards afterwards anyway ... 73, Carl - wk3c |
zindazenda wrote:
no..on investugation this looks well abit crap..i cant see how it is going to work with 100 sm 0805 components.. so anyother ideas.. can one buy flow soldering equipment s/h??? g0zen.. Sir: From necessity I did this with well over 500 parts on two assemblies for radios that were prototypes. The people that had tried to do the assembly with the approved methods had set the solder paste on the pads, placed the parts in postion, both steps done by hand and then washed the boards before they vapor phased the boards. This department then went ahead and cleaned the filters out of the washing equipment, repasted the boards and just put the parts where they fit. I got two blank boards and all the parts sorted out into envelopes in tote pans with clean prints of the parts list and a component layout with the task set to get it done in a certain amount of time. Monday through Saturday I worked 16 hour days and then on Sunday I took it easy and worked 12 hours. In addition to the surface mount parts I also had about the same number of leaded parts on each board. When I was done I was told that there were a total of 5 errors between the two boards. It took about 2 to 3 weeks to accomplish this and several sets of batteries for headset radio. There were times I would place parts on the bench in front of me, put the envelope back into the tote pan and could not see the parts. I would find them after blinking several times, place them and then get up to take a walk through the area to get things loosened up and relaxed a little bit. This method I described is indeed a possible method. It has been done by others than myself and sometimes it is the most expedient method to accomplish the task. The smallest parts available would make this method a challenge but it would still be something that could be done with some time and paitence. Good luck on your project and I wish you the best Sir. |
zindazenda wrote:
no..on investugation this looks well abit crap..i cant see how it is going to work with 100 sm 0805 components.. so anyother ideas.. can one buy flow soldering equipment s/h??? g0zen.. Sir: From necessity I did this with well over 500 parts on two assemblies for radios that were prototypes. The people that had tried to do the assembly with the approved methods had set the solder paste on the pads, placed the parts in postion, both steps done by hand and then washed the boards before they vapor phased the boards. This department then went ahead and cleaned the filters out of the washing equipment, repasted the boards and just put the parts where they fit. I got two blank boards and all the parts sorted out into envelopes in tote pans with clean prints of the parts list and a component layout with the task set to get it done in a certain amount of time. Monday through Saturday I worked 16 hour days and then on Sunday I took it easy and worked 12 hours. In addition to the surface mount parts I also had about the same number of leaded parts on each board. When I was done I was told that there were a total of 5 errors between the two boards. It took about 2 to 3 weeks to accomplish this and several sets of batteries for headset radio. There were times I would place parts on the bench in front of me, put the envelope back into the tote pan and could not see the parts. I would find them after blinking several times, place them and then get up to take a walk through the area to get things loosened up and relaxed a little bit. This method I described is indeed a possible method. It has been done by others than myself and sometimes it is the most expedient method to accomplish the task. The smallest parts available would make this method a challenge but it would still be something that could be done with some time and paitence. Good luck on your project and I wish you the best Sir. |
zindazenda wrote:
no..on investugation this looks well abit crap..i cant see how it is going to work with 100 sm 0805 components.. so anyother ideas.. can one buy flow soldering equipment s/h??? g0zen.. "Allan Butler" wrote in message news:ALRjc.5600$Rd4.566539@attbi_s51... What I have done in the past is to tin the pads where the parts are going to be mounted and then I use two soldering irons. One on each pad and it pulls the part right down into a good position. Ok ok I hear the question now. What about parts with more than two leads? That is a valid and good question. Only tin two pads for that part and use the soldering iron on each one of the pads to get the part mounted and in position to finish soldering the rest of the leads one at a time. For many irons, you can also buy fork-ended solder tips that bridge over the parts. I made one by cutting and filing an old tip, and it worked OK for parts removal. However, it would need some co-ordination to make the tip contact the two pads without also knocking the part out of place. The toaster oven looks like a much better method for a whole-board assembly project, except for two key problems: 1. Solder paste is expensive 2. Solder paste doesn't keep (seems to have about the same time constant as Horowitz & Hill's wet fish) Those are big problems for occasional, low-volume users such as ourselves. So the questions a 1. Where's a low-cost source of solder paste? (in various parts of the world) 2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? -- 73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek |
zindazenda wrote:
no..on investugation this looks well abit crap..i cant see how it is going to work with 100 sm 0805 components.. so anyother ideas.. can one buy flow soldering equipment s/h??? g0zen.. "Allan Butler" wrote in message news:ALRjc.5600$Rd4.566539@attbi_s51... What I have done in the past is to tin the pads where the parts are going to be mounted and then I use two soldering irons. One on each pad and it pulls the part right down into a good position. Ok ok I hear the question now. What about parts with more than two leads? That is a valid and good question. Only tin two pads for that part and use the soldering iron on each one of the pads to get the part mounted and in position to finish soldering the rest of the leads one at a time. For many irons, you can also buy fork-ended solder tips that bridge over the parts. I made one by cutting and filing an old tip, and it worked OK for parts removal. However, it would need some co-ordination to make the tip contact the two pads without also knocking the part out of place. The toaster oven looks like a much better method for a whole-board assembly project, except for two key problems: 1. Solder paste is expensive 2. Solder paste doesn't keep (seems to have about the same time constant as Horowitz & Hill's wet fish) Those are big problems for occasional, low-volume users such as ourselves. So the questions a 1. Where's a low-cost source of solder paste? (in various parts of the world) 2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? -- 73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek |
"Ian White, G3SEK" wrote in message
... 2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? It keeps much better if it is kept in a fridge. Leon -- Leon Heller, G1HSM http://www.geocities.com/leon_heller |
"Ian White, G3SEK" wrote in message
... 2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? It keeps much better if it is kept in a fridge. Leon -- Leon Heller, G1HSM http://www.geocities.com/leon_heller |
"Ian White, G3SEK" wrote in message ... 2. Solder paste doesn't keep (seems to have about the same time constant as Horowitz & Hill's wet fish) 2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? Solder paste must be kept refrigerated to maximize its shelf life. (read the manufacturer's storage and handling instructions CAREFULLY, both for proper storage for product longevity and for safety reasons) Note: If you don't have a dedicated refrigerator and *must* use one you keep food in, you *must* take the *utmost* of care to do (at least) the following before even *considering* putting solder paste in your (regular, food storage) refrigerator (and you should probably do this even if you have a dedicated refrigerator): 1) clean the tube VERY well after use to make sure no paste is on the outside 2) place the tube in a plastic "zip-lock" bag (which must not be contaminated with solder paste) 3) place the bag, with the tube inside into a plastic container with a tightly sealing lid (again, this must be clean and not contaminated with solder paste) Doing this *very carefully and meticulously* will at least minimize the possibility of contaminating your refrigerator with solder paste particles, which are VERY small ... Further notes: You should, at after each step above, THOROUGHLY wash your hands to assure that you don't transfer any solder paste to the outside of the bag or the plastic container. Use a fresh, brand new bag each time (they are cheap). Also wash the plastic container THOROUGHLY inside and out each time you prepare to re-store your solder paste (don't wash it in your dishwasher - do it manually and clean up afterwards as if you were cleaning up a hazmat spill). And finally, NEVER use the plastic container for food after you've stored solder paste in it, NOT MATTER HOW WELL YOU THINK YOU'VE CLEANED IT. Ultimate note: If you have children in the home who could get into the refrigerator and get at the solder paste, you probably shouldn't even consider putting solder paste in your refrigerator where the children could get at it ... DISCLAIMER: While I believe the precautions above to be adequate and use them myself, I take no responsibility for any consequences of a proper lack of care on anyone's part in doing what I describe above, or any inadequacy in my suggestions. Anyone following these suggestions does so solely at their own risk. 73, Carl - wk3c p.s. Additionally, anyone considering the "ez-bake" method of reflow soldering needs to understand the ABSOLUTE necessity of having a dedicated toaster oven that is NEVER used for food preparation. It, along with all soldering supplies should be used and stored in an area that is inaccessable to children (keeping in mind how inquisitive children are and their ability to get into things that you *thought* were secure or inaccessable). |
"Ian White, G3SEK" wrote in message ... 2. Solder paste doesn't keep (seems to have about the same time constant as Horowitz & Hill's wet fish) 2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? Solder paste must be kept refrigerated to maximize its shelf life. (read the manufacturer's storage and handling instructions CAREFULLY, both for proper storage for product longevity and for safety reasons) Note: If you don't have a dedicated refrigerator and *must* use one you keep food in, you *must* take the *utmost* of care to do (at least) the following before even *considering* putting solder paste in your (regular, food storage) refrigerator (and you should probably do this even if you have a dedicated refrigerator): 1) clean the tube VERY well after use to make sure no paste is on the outside 2) place the tube in a plastic "zip-lock" bag (which must not be contaminated with solder paste) 3) place the bag, with the tube inside into a plastic container with a tightly sealing lid (again, this must be clean and not contaminated with solder paste) Doing this *very carefully and meticulously* will at least minimize the possibility of contaminating your refrigerator with solder paste particles, which are VERY small ... Further notes: You should, at after each step above, THOROUGHLY wash your hands to assure that you don't transfer any solder paste to the outside of the bag or the plastic container. Use a fresh, brand new bag each time (they are cheap). Also wash the plastic container THOROUGHLY inside and out each time you prepare to re-store your solder paste (don't wash it in your dishwasher - do it manually and clean up afterwards as if you were cleaning up a hazmat spill). And finally, NEVER use the plastic container for food after you've stored solder paste in it, NOT MATTER HOW WELL YOU THINK YOU'VE CLEANED IT. Ultimate note: If you have children in the home who could get into the refrigerator and get at the solder paste, you probably shouldn't even consider putting solder paste in your refrigerator where the children could get at it ... DISCLAIMER: While I believe the precautions above to be adequate and use them myself, I take no responsibility for any consequences of a proper lack of care on anyone's part in doing what I describe above, or any inadequacy in my suggestions. Anyone following these suggestions does so solely at their own risk. 73, Carl - wk3c p.s. Additionally, anyone considering the "ez-bake" method of reflow soldering needs to understand the ABSOLUTE necessity of having a dedicated toaster oven that is NEVER used for food preparation. It, along with all soldering supplies should be used and stored in an area that is inaccessable to children (keeping in mind how inquisitive children are and their ability to get into things that you *thought* were secure or inaccessable). |
2. Solder paste doesn't keep (seems to have about the same time constant
as Horowitz & Hill's wet fish) Solder paste must be kept refrigerated to maximize its shelf life. (read the manufacturer's storage and handling instructions CAREFULLY, both for proper storage for product longevity and for safety reasons) I sure hope "solder paste" is NOT the same thing as "soldering paste flux", or else my shoe-polish-size can of "Kester Soldering Paste Flux" (with a hole in the lid through which I occasionally poke a soldering pencil) that's been sitting on my workbench for at least the last 25 years hasn't heard about those storage and handling instructions! --Myron. -- Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448 NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol) |
2. Solder paste doesn't keep (seems to have about the same time constant
as Horowitz & Hill's wet fish) Solder paste must be kept refrigerated to maximize its shelf life. (read the manufacturer's storage and handling instructions CAREFULLY, both for proper storage for product longevity and for safety reasons) I sure hope "solder paste" is NOT the same thing as "soldering paste flux", or else my shoe-polish-size can of "Kester Soldering Paste Flux" (with a hole in the lid through which I occasionally poke a soldering pencil) that's been sitting on my workbench for at least the last 25 years hasn't heard about those storage and handling instructions! --Myron. -- Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448 NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol) |
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wrote in message ... 2. Solder paste doesn't keep (seems to have about the same time constant as Horowitz & Hill's wet fish) Solder paste must be kept refrigerated to maximize its shelf life. (read the manufacturer's storage and handling instructions CAREFULLY, both for proper storage for product longevity and for safety reasons) I sure hope "solder paste" is NOT the same thing as "soldering paste flux", or else my shoe-polish-size can of "Kester Soldering Paste Flux" (with a hole in the lid through which I occasionally poke a soldering pencil) that's been sitting on my workbench for at least the last 25 years hasn't heard about those storage and handling instructions! --Myron. No, Myron ... solder paste is a suspension of micro-spheres of solder in a flux that makes a paste that is used for reflow soldering of SMT parts. Carl - wk3c |
wrote in message ... 2. Solder paste doesn't keep (seems to have about the same time constant as Horowitz & Hill's wet fish) Solder paste must be kept refrigerated to maximize its shelf life. (read the manufacturer's storage and handling instructions CAREFULLY, both for proper storage for product longevity and for safety reasons) I sure hope "solder paste" is NOT the same thing as "soldering paste flux", or else my shoe-polish-size can of "Kester Soldering Paste Flux" (with a hole in the lid through which I occasionally poke a soldering pencil) that's been sitting on my workbench for at least the last 25 years hasn't heard about those storage and handling instructions! --Myron. No, Myron ... solder paste is a suspension of micro-spheres of solder in a flux that makes a paste that is used for reflow soldering of SMT parts. Carl - wk3c |
"Bob Headrick" wrote in message
... "G.Beat" wrote in message news:yhPic.30933$aQ6.1632419@attbi_s51... "zindazenda" wrote in message ... can anyone recommend at diy way of flow soldering surface mount components?? i ask as making somr boards up that are totally sm, and well i am going blind trying to solder them using iron!! Here is a link for the "Ez-bake" approach to soldering. http://www.seattlerobotics.org/encod...6/oven_art.htm That looks like a good way to go, it would sure beat trying to solder individual leads, but... it looks like the minimum order quantity is 10 tubes of solder, for $120 or so. (And these are the small 35g tubes. Digikey's are more like $800 for the minimum qty of 500g tubes.) Anyone know a source for small quantity (1-3 tubes) purchases? - 73 Bob W7OV Call Wassco in California .. they will be my choice next month. Future/Active use to have small supplies in the refrigerator at the Chicago store -- unfortunately all USA stores closed in 2003. Last day for Chicago store was Feb. 1, 2003 (Columbia reentry accident) gb |
"Bob Headrick" wrote in message
... "G.Beat" wrote in message news:yhPic.30933$aQ6.1632419@attbi_s51... "zindazenda" wrote in message ... can anyone recommend at diy way of flow soldering surface mount components?? i ask as making somr boards up that are totally sm, and well i am going blind trying to solder them using iron!! Here is a link for the "Ez-bake" approach to soldering. http://www.seattlerobotics.org/encod...6/oven_art.htm That looks like a good way to go, it would sure beat trying to solder individual leads, but... it looks like the minimum order quantity is 10 tubes of solder, for $120 or so. (And these are the small 35g tubes. Digikey's are more like $800 for the minimum qty of 500g tubes.) Anyone know a source for small quantity (1-3 tubes) purchases? - 73 Bob W7OV Call Wassco in California .. they will be my choice next month. Future/Active use to have small supplies in the refrigerator at the Chicago store -- unfortunately all USA stores closed in 2003. Last day for Chicago store was Feb. 1, 2003 (Columbia reentry accident) gb |
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"Ian White, G3SEK" wrote in message
... For many irons, you can also buy fork-ended solder tips that bridge over the parts. I made one by cutting and filing an old tip, and it worked OK for parts removal. However, it would need some co-ordination to make the tip contact the two pads without also knocking the part out of place. Yes, a number of SMT tips for Pace and Weller soldering irons/stations. Weller TCP series http://www.wassco.com/csmsurmounsm.html Pace irons (3/16" tip) http://store1.yimg.com/I/was_1789_9025999 The toaster oven looks like a much better method for a whole-board assembly project, except for two key problems: 1. Solder paste is expensive Depends on the size you are looking at. Yes, the large sizes can be expensive. The syringe sizes (35 g) are about what I pay for a 1 lb roll of solder and are the only sizes that I purchase for small projects (less waste) http://www.wassco.com/kessolsn.html R276 No-Clean, 35g WAS-01-021403$12.95 R500 Water Soluble, 35g WAS-01-021603$12.95 2. Solder paste doesn't keep (seems to have about the same time constant as Horowitz & Hill's wet fish) Ian, my brother is the buyer/shipping coordinator for a major fresh water fish distributor in SE USA. Missed plane connection in Anchorage, Alaska (polar route from Hong Kong to Atlanta) .. leads to frozen fish .. when you wanted live ! Wassco notifies all buyers of their shipment policies: Solder Paste must ship overnight in a refrigerated condition. We will contact you to discuss the extra freight charges that will apply. Those are big problems for occasional, low-volume users such as ourselves. So the questions a 1. Where's a low-cost source of solder paste? (in various parts of the world) Wassco is the recomemnded source for solder and tools Elecraft builders. Of course this is California based. Maybe a talk to some of the UK distibutors? 2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? Refrigerator - that's how I bought it at the Acitve Electronics stores in US, before they closed. I was also told they did not keep solder paste more than 2 to 3 months at each store. Store in a refrigerator away from your normal late night consumables ..... or that pasty taste in your mouth might be the last tube for your project. Surface Mount Technology Assn. http://smta.org/ Greg w9gb |
1 Attachment(s)
"Ian White, G3SEK" wrote in message
... For many irons, you can also buy fork-ended solder tips that bridge over the parts. I made one by cutting and filing an old tip, and it worked OK for parts removal. However, it would need some co-ordination to make the tip contact the two pads without also knocking the part out of place. Yes, a number of SMT tips for Pace and Weller soldering irons/stations. Weller TCP series http://www.wassco.com/csmsurmounsm.html Pace irons (3/16" tip) http://store1.yimg.com/I/was_1789_9025999 The toaster oven looks like a much better method for a whole-board assembly project, except for two key problems: 1. Solder paste is expensive Depends on the size you are looking at. Yes, the large sizes can be expensive. The syringe sizes (35 g) are about what I pay for a 1 lb roll of solder and are the only sizes that I purchase for small projects (less waste) http://www.wassco.com/kessolsn.html R276 No-Clean, 35g WAS-01-021403$12.95 R500 Water Soluble, 35g WAS-01-021603$12.95 2. Solder paste doesn't keep (seems to have about the same time constant as Horowitz & Hill's wet fish) Ian, my brother is the buyer/shipping coordinator for a major fresh water fish distributor in SE USA. Missed plane connection in Anchorage, Alaska (polar route from Hong Kong to Atlanta) .. leads to frozen fish .. when you wanted live ! Wassco notifies all buyers of their shipment policies: Solder Paste must ship overnight in a refrigerated condition. We will contact you to discuss the extra freight charges that will apply. Those are big problems for occasional, low-volume users such as ourselves. So the questions a 1. Where's a low-cost source of solder paste? (in various parts of the world) Wassco is the recomemnded source for solder and tools Elecraft builders. Of course this is California based. Maybe a talk to some of the UK distibutors? 2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? Refrigerator - that's how I bought it at the Acitve Electronics stores in US, before they closed. I was also told they did not keep solder paste more than 2 to 3 months at each store. Store in a refrigerator away from your normal late night consumables ..... or that pasty taste in your mouth might be the last tube for your project. Surface Mount Technology Assn. http://smta.org/ Greg w9gb |
well i have just made 12 boards holding 100 or so 0805, 223, 20sm dil.etc..
it took a day.. in the end i got out very small twezzers placed the components on board held in place by small drop of super glue dispensed by end of tooth pick, and held down by other end of pick till dry.... then soldered using small iron... all worked first go... BUT.. my eyes didn't half hurt by the end... there must be a better way..ez-bake i dont think is it..any other ideas?? how is it done professionally..??? g0zen "G.Beat" wrote in message news:48Tkc.9109$0H1.998600@attbi_s54... "Ian White, G3SEK" wrote in message ... For many irons, you can also buy fork-ended solder tips that bridge over the parts. I made one by cutting and filing an old tip, and it worked OK for parts removal. However, it would need some co-ordination to make the tip contact the two pads without also knocking the part out of place. Yes, a number of SMT tips for Pace and Weller soldering irons/stations. Weller TCP series http://www.wassco.com/csmsurmounsm.html Pace irons (3/16" tip) http://store1.yimg.com/I/was_1789_9025999 The toaster oven looks like a much better method for a whole-board assembly project, except for two key problems: 1. Solder paste is expensive Depends on the size you are looking at. Yes, the large sizes can be expensive. The syringe sizes (35 g) are about what I pay for a 1 lb roll of solder and are the only sizes that I purchase for small projects (less waste) http://www.wassco.com/kessolsn.html R276 No-Clean, 35g WAS-01-021403$12.95 R500 Water Soluble, 35g WAS-01-021603$12.95 2. Solder paste doesn't keep (seems to have about the same time constant as Horowitz & Hill's wet fish) Ian, my brother is the buyer/shipping coordinator for a major fresh water fish distributor in SE USA. Missed plane connection in Anchorage, Alaska (polar route from Hong Kong to Atlanta) .. leads to frozen fish .. when you wanted live ! Wassco notifies all buyers of their shipment policies: Solder Paste must ship overnight in a refrigerated condition. We will contact you to discuss the extra freight charges that will apply. Those are big problems for occasional, low-volume users such as ourselves. So the questions a 1. Where's a low-cost source of solder paste? (in various parts of the world) Wassco is the recomemnded source for solder and tools Elecraft builders. Of course this is California based. Maybe a talk to some of the UK distibutors? 2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? Refrigerator - that's how I bought it at the Acitve Electronics stores in US, before they closed. I was also told they did not keep solder paste more than 2 to 3 months at each store. Store in a refrigerator away from your normal late night consumables ..... or that pasty taste in your mouth might be the last tube for your project. Surface Mount Technology Assn. http://smta.org/ Greg w9gb |
well i have just made 12 boards holding 100 or so 0805, 223, 20sm dil.etc..
it took a day.. in the end i got out very small twezzers placed the components on board held in place by small drop of super glue dispensed by end of tooth pick, and held down by other end of pick till dry.... then soldered using small iron... all worked first go... BUT.. my eyes didn't half hurt by the end... there must be a better way..ez-bake i dont think is it..any other ideas?? how is it done professionally..??? g0zen "G.Beat" wrote in message news:48Tkc.9109$0H1.998600@attbi_s54... "Ian White, G3SEK" wrote in message ... For many irons, you can also buy fork-ended solder tips that bridge over the parts. I made one by cutting and filing an old tip, and it worked OK for parts removal. However, it would need some co-ordination to make the tip contact the two pads without also knocking the part out of place. Yes, a number of SMT tips for Pace and Weller soldering irons/stations. Weller TCP series http://www.wassco.com/csmsurmounsm.html Pace irons (3/16" tip) http://store1.yimg.com/I/was_1789_9025999 The toaster oven looks like a much better method for a whole-board assembly project, except for two key problems: 1. Solder paste is expensive Depends on the size you are looking at. Yes, the large sizes can be expensive. The syringe sizes (35 g) are about what I pay for a 1 lb roll of solder and are the only sizes that I purchase for small projects (less waste) http://www.wassco.com/kessolsn.html R276 No-Clean, 35g WAS-01-021403$12.95 R500 Water Soluble, 35g WAS-01-021603$12.95 2. Solder paste doesn't keep (seems to have about the same time constant as Horowitz & Hill's wet fish) Ian, my brother is the buyer/shipping coordinator for a major fresh water fish distributor in SE USA. Missed plane connection in Anchorage, Alaska (polar route from Hong Kong to Atlanta) .. leads to frozen fish .. when you wanted live ! Wassco notifies all buyers of their shipment policies: Solder Paste must ship overnight in a refrigerated condition. We will contact you to discuss the extra freight charges that will apply. Those are big problems for occasional, low-volume users such as ourselves. So the questions a 1. Where's a low-cost source of solder paste? (in various parts of the world) Wassco is the recomemnded source for solder and tools Elecraft builders. Of course this is California based. Maybe a talk to some of the UK distibutors? 2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? Refrigerator - that's how I bought it at the Acitve Electronics stores in US, before they closed. I was also told they did not keep solder paste more than 2 to 3 months at each store. Store in a refrigerator away from your normal late night consumables ..... or that pasty taste in your mouth might be the last tube for your project. Surface Mount Technology Assn. http://smta.org/ Greg w9gb |
2. How can we either store it so it stays fresh; or re-constitute it
after it's gorn orf? It keeps much better if it is kept in a fridge. Try the freezer - lasts MUCH longer. That's where I keep mine. It only takes a few minutes to defrost (good conductor) and keeps for years, even with the occasional defrosting. BR H |
2. How can we either store it so it stays fresh; or re-constitute it
after it's gorn orf? It keeps much better if it is kept in a fridge. Try the freezer - lasts MUCH longer. That's where I keep mine. It only takes a few minutes to defrost (good conductor) and keeps for years, even with the occasional defrosting. BR H |
John Smith wrote:
2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? It keeps much better if it is kept in a fridge. Try the freezer - lasts MUCH longer. That's where I keep mine. It only takes a few minutes to defrost (good conductor) and keeps for years, even with the occasional defrosting. Ah... thank you, that's the answer I was hoping for. (Warnings about avoiding cross-contamination to food also noted.) -- 73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek |
John Smith wrote:
2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? It keeps much better if it is kept in a fridge. Try the freezer - lasts MUCH longer. That's where I keep mine. It only takes a few minutes to defrost (good conductor) and keeps for years, even with the occasional defrosting. Ah... thank you, that's the answer I was hoping for. (Warnings about avoiding cross-contamination to food also noted.) -- 73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek |
On Mon, 10 May 2004 09:36:15 +0100, "Ian White, G3SEK"
wrote: John Smith wrote: 2. How can we either store it so it stays fresh; or re-constitute it after it's gorn orf? It keeps much better if it is kept in a fridge. Try the freezer - lasts MUCH longer. That's where I keep mine. It only takes a few minutes to defrost (good conductor) and keeps for years, even with the occasional defrosting. Ah... thank you, that's the answer I was hoping for. Enjoy your holiday, Ian? -- "What is now proved was once only imagin'd." - William Blake, 1793. |
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