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Max The Magnificent
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Re: How would you judge?
Max The Magnificent   11/27/2013 12:27:04 PM
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@Antedeluvian: ... I have no illusions about winning!

That's good to hear, because I plan on entering also :-)

Max The Magnificent
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Re: How would you judge?
Max The Magnificent   11/27/2013 12:26:02 PM
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@Antedelivian: How would you judge the solder joins? neatness, connectivity, symmetry, strength, "blobiness"?

Well, this is something we would have to decide beforehand.

Max The Magnificent
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Re: Getting nasty
Max The Magnificent   11/27/2013 12:24:37 PM
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@Antedeluvian: If you want to separate the wheat from the chaff, try getting them to solder magnet wire.

Ooohhhhhh, you are a cruel man!

 

Max The Magnificent
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Re: Soldering challange
Max The Magnificent   11/27/2013 12:23:41 PM
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@SteveDS: To make it really interesting you need to dead bug a chip on the board with blue wires!


Good idea -- if we do go ahead with this, maybe we should form a group to come up with a special competition board and associated tasks.

Crusty1
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Re: I remember it well
Crusty1   11/27/2013 6:55:44 AM
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@David: I think my first head of department at London Underground Research Labs showed me how to do it and it mainly concerned getting the oxide coat off with fairly normal lab reagents, and then quickly soldering.

@Max; While thinking about a soldering competetion you could make life interesting by getting the contestants to measure the resistance using a slide wire potentiometer and Weston Cell. How many have used similar old kit?

I used, once, a Cambridge optical pyrometer at college, but I have never seen another one to put my hands on.

 

David Ashton
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Re: I remember it well
David Ashton   11/27/2013 4:50:42 AM
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@Crusty....Manganin.... can't help you there....nor can google, much.... some suggestions on iron temperature and usng a special flux?

Crusty1
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Re: I remember it well
Crusty1   11/27/2013 4:35:03 AM
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@David: Oh how I had forgotton those horrible tinsel wires. All my headphones were government surplus from a shop called Job Stocks.

Manganin resistance wire needed a trick which I seem to have forgotten?

David Ashton
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Re: I remember it well
David Ashton   11/27/2013 4:17:50 AM
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@Crusty....working on military radios I had similar problems with the "Tinsel" wires used in handset and microphone curly cords.  The trick was to get a strand out of multistranded wire, and use it to bind up the tinsel cores.  You could do a very neat job with practice.

David Ashton
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Re: How would you judge?
David Ashton   11/27/2013 4:14:29 AM
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@Max - I reckon Duane would be a good judge for your competition?

Crusty1
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Re: I remember it well
Crusty1   11/27/2013 3:52:35 AM
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Soldering with the 300 watt had soldering iron was a real pain at 10 years old the Iron was so heavy to hold.

Multi strand Litz wire tails from a tuning coil were the killer of dry joints for me, until dad showed me the trick of soldering it. Dip the cotton and shelac coated wires in alcohol, set light to the end and wait for a lovely bright glob of copper to form and then blow the flame out and then solder. Oh what lovely mini fires I had with this.

It seems to me basic soldering skills are something that needs to be taught on the bench, preferably in a flame proof room.

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