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#21
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On Sat, 04 Sep 2004 03:34:01 GMT, "Harry Dellamano"
wrote: "Tim Wescott" wrote in message ... Lucky you. PDX has a Fry's and a little local outfit, but that doesn't count for real parts. I used to live in the Boston area, 30 minutes away from an Active store -- that was nice, particularly since it backed up against Future (same company) & you could get non-catalog items at the counter if you really needed them. When I lived in the Boston area Radio Shack was a real parts warehouse (on Commonwealth Avenue) with a will-call counter (only 45 years ago ;-) ...Jim Thompson That was probably before they got bought by Tandy. -- Tim Wescott When I lived in the Boston area, I would drive by Radio Shack on the way to Scully Square and the real good parts. Cheers, Harry And the Old Howard Casino ?:-) ...Jim Thompson -- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice ![]() | E-mail Address at Website Fax ![]() | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. |
#22
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Leon Heller wrote:
Here in the UK virtually all the local component outlets have disappeared. However, there are plenty of mail order suppliers and one can get most items the next day. Leon It's rare here to be able to waltz down to someplace local and get real components, unless you're lucky enough to happen to be by a big store. And Fry's don't count for parts (although they still have decent test equipment for sale). -- Tim Wescott Wescott Design Services http://www.wescottdesign.com |
#23
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Charles DH Williams wrote:
In article , Tim Wescott wrote: A friend of mine is putting together a middle-school electronics lab, and wants to get some good cheap soldering irons. Remind him to consider the health and safety issues before making a final decision. In the EC (and perhaps elsewhere) one soon will only be able to get lead-free solder so the soldering staions will need to be compatible with this. The fumes from flux also need to be considered. The exposure to fumes by a child will likely be minimal but, as the purpose will be 'educational', there may be a duty to employ best practice so they end up knowing what a safe workstation is like. Charles Hmm. Depressingly good point. I just hold my breath while soldering and wash up when I'm done but I really ought to get a hood -- particularly since I'm training my kid to all my bad habits. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com |
#24
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Paul Burridge wrote:
On Fri, 3 Sep 2004 22:17:36 -0500, "dh" wrote: This iron costs $25 and works well for DIP down to TSSOP. Along with a cheap larger iron for big wires and a heat gun for desoldering, it's all I use. Plus holds less heat than a big soldering iron, lessening damage if someone grabs the wrong end. http://www.hmcelectronics.com/cgi-bi...duct/6520-0001 Good stuff. My old 25W Antex is still going strong after more than 20 years! I'll probably buy one of these 15W jobs for the odd SMDs I use. So what will you use for the normal SMDs? ![]() -- Tim Wescott Wescott Design Services http://www.wescottdesign.com |
#25
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Tim Wescott wrote:
Charles DH Williams wrote: In article , Tim Wescott wrote: A friend of mine is putting together a middle-school electronics lab, and wants to get some good cheap soldering irons. Remind him to consider the health and safety issues before making a final decision. In the EC (and perhaps elsewhere) one soon will only be able to get lead-free solder so the soldering staions will need to be compatible with this. The fumes from flux also need to be considered. The exposure to fumes by a child will likely be minimal but, as the purpose will be 'educational', there may be a duty to employ best practice so they end up knowing what a safe workstation is like. Charles Hmm. Depressingly good point. I just hold my breath while soldering and wash up when I'm done but I really ought to get a hood -- particularly since I'm training my kid to all my bad habits. At different places where I've worked with a bunch of people soldering at a long bench, I've seen muffin fans at each workstation to keep the rosin smoke out of their face. Good Luck! Rich |
#26
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"Tim Wescott" wrote in message
... Charles DH Williams wrote: In article , Tim Wescott wrote: A friend of mine is putting together a middle-school electronics lab, and wants to get some good cheap soldering irons. Remind him to consider the health and safety issues before making a final decision. In the EC (and perhaps elsewhere) one soon will only be able to get lead-free solder so the soldering staions will need to be compatible with this. The fumes from flux also need to be considered. The exposure to fumes by a child will likely be minimal but, as the purpose will be 'educational', there may be a duty to employ best practice so they end up knowing what a safe workstation is like. Charles Hmm. Depressingly good point. I just hold my breath while soldering and wash up when I'm done but I really ought to get a hood -- particularly since I'm training my kid to all my bad habits. Computer muffin fans (12 vdc) are a cheap alternative (which is what is inside the Haako 493 with a filter in front) The Haako 493 and similiar clone units are available for $ 20 to $ 35 used - I picked up one for a workbench last month - $ 30 with the shipping ! Train these kids in proper workbench habits and shop safety - first. The lead-free initaitve is real and in the US we will be working with a "mixed environment" (repair of older equipment with compnents that may not be able to handle high temperatures (70 to 90 degrees higher depending upon formulation used) required for lead-free solders. Kester has a major training effort underway - just for lead-free http://www.kester.com/en-us/index.aspx G. Beat |
#27
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![]() Train these kids in proper workbench habits and shop safety - first. The lead-free initaitve is real and in the US we will be working with a "mixed environment" (repair of older equipment with compnents that may not be able to handle high temperatures (70 to 90 degrees higher depending upon formulation used) required for lead-free solders. It's more like 15 to 20 degrees C higher for lead free solder. |
#28
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"Jeff" wrote in message
... Train these kids in proper workbench habits and shop safety - first. The lead-free initaitve is real and in the US we will be working with a "mixed environment" (repair of older equipment with compnents that may not be able to handle high temperatures (70 to 90 degrees higher depending upon formulation used) required for lead-free solders. It's more like 15 to 20 degrees C higher for lead free solder. Jeff I was referencing F, you are quoting C. I think you math is a bit low for C (63/37 eutectic is 183 degrees C and Tin/Silver and Tin/Copper eutectics are at 221 and 227. Here is the solder alloy temperature chart (Kester's) - so everyone can see the various formulations, as well as pure tin melting point and the lead-free formulations. http://www.kester.com/en-us/technical/alloy.aspx gb |
#29
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The exposure to fumes by a child will likely be minimal but, as
the purpose will be 'educational', there may be a duty to employ best practice so they end up knowing what a safe workstation is like. Charles Hmm. Depressingly good point. I just hold my breath while soldering and wash up when I'm done but I really ought to get a hood -- particularly since I'm training my kid to all my bad habits. ======================================== With the room being ventilated, a small axial fan positioned close to the soldering area will adequately disperse the fumes . Frank GM0CSZ / KN6WH |
#30
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But if you had a whole classroom of N children soldering, then
N dispersals scattered over the N children might result in a fume density of N * N / N which would be no dispersal at all! Industrial soldering set-ups have a small vacuum pipe mounted on the iron close to the tip to draw away fumes. "Highland Ham" wrote in message ... The exposure to fumes by a child will likely be minimal but, as the purpose will be 'educational', there may be a duty to employ best practice so they end up knowing what a safe workstation is like. Hmm. Depressingly good point. I just hold my breath while soldering and wash up when I'm done but I really ought to get a hood -- particularly since I'm training my kid to all my bad habits. With the room being ventilated, a small axial fan positioned close to the soldering area will adequately disperse the fumes . |
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