Hi all.
I've had this 100/140 watt Weller soldering gun since I bought it for repairing the wiring to my car's rear window toaster (defogger).
I know that the guts contain a transformer with a very high current/low voltage secondary winding and a 2 position trigger switch. Yesterday I was curious what exactly the secondary voltage was and checked it. To my amazement, the first position of the switch is the higher voltage/wattage.
1. half trigger: 285mV
2 trigger full on: 250mV
This is counter-intuitive to me. All these years I thought that full-in on the trigger was the high power setting.
Note: voltage varies 5% or so depending on tip temperature.
Learn something new every day!
Bob
Soldering gun - Weller
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Huh? I've had my Weller 8200 since around 1967 and it's always been HIGH output with trigger pulled all the way in, low power with the first click. Hooking a current probe around the tip will show arc welding currents through that tip.
Dean
Dean
Dean Huster, Electronics Curmudgeon
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).
R.I.P.
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).
R.I.P.
I had to check, and my cheapo home dmm doesn't show any voltage on either setting, but then again my lowest ac setting is 200v. On another note, does any one any idea where to get the 120 volt wedge base lamps these things use? I haven't had a lamp in mine for years because I could never find one.
Best regards
Tom
Best regards
Tom
How odd- One of mine, a Weller 8200 Universal (also has a sticker saying Model 8200 "The Cooper Group") is rated 140/100 watts. First click high, full trigger is low power.
The other is a Weller-Apex 8200 N, rated 100/140, first click low, full trigger high power.
Different applications, I suppose.
All their newer guns are 140/100 watts.
The other is a Weller-Apex 8200 N, rated 100/140, first click low, full trigger high power.
Different applications, I suppose.
All their newer guns are 140/100 watts.
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They must have changed then, to "greener" guns where the normal grip-it-with-all-your-life (the normal position) is the less power-hungry position and you have to release it a bit for kicking in the turbo. Probably saves on tips that way, too, especially if you're like me and use #12 copper wire for the tips rather than paying a fortune for "real" ones.
"Wedge base" lamps? I assumed that they still used the submini candelabra #222 for the headlight(s).
Dean
"Wedge base" lamps? I assumed that they still used the submini candelabra #222 for the headlight(s).
Dean
Dean Huster, Electronics Curmudgeon
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).
R.I.P.
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).
R.I.P.
Lessee, my investigation of the soldering gun started because I was trying to fix an overpriced plastic set of stereo headphones. The plastic head band broke.
So I was thinking of replacing the head band with some coat hanger wire, but that wire bends too easy. Then I thought of hardening the coathanger wire by heating it up and quenching in water. I've used a car battery and jumper cables to send a high current through iron picture-frame wire before. This worked OK for cutting styrofoam when I was making model airlplane wings.
But since then Wikipedia has told me that soft iron can't be hardened because it isn't an alloy, and the soldering gun can't provide enough power anyway.
So that's how my mind flips around on a typical day.
So I was thinking of replacing the head band with some coat hanger wire, but that wire bends too easy. Then I thought of hardening the coathanger wire by heating it up and quenching in water. I've used a car battery and jumper cables to send a high current through iron picture-frame wire before. This worked OK for cutting styrofoam when I was making model airlplane wings.
But since then Wikipedia has told me that soft iron can't be hardened because it isn't an alloy, and the soldering gun can't provide enough power anyway.
So that's how my mind flips around on a typical day.
- dacflyer
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the lamp in the gun is not 120 volts, its a low voltage lamp..i cannot remember if it is 8 volt or 12 volt...
but here is a link if you need to order one..
http://www.cooperhandtools.com/brands/C ... 7103475671
but here is a link if you need to order one..
http://www.cooperhandtools.com/brands/C ... 7103475671
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The #222 lamp is something like 1.5 - 3.0 volts with a built-in lens, often also used to be used as the lamp in cheap penlights before high-brightness LEDs came along.
Dean
Dean
Dean Huster, Electronics Curmudgeon
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).
R.I.P.
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).
R.I.P.
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OK, My semi faulty memory only slightly betrayed me. I have a Weller 8200, 100/140 which uses a wedge base 120 v lamp. I have an " Archer" model 64-2190 which is identical to the Weller units, except the red side sticker has the Archer name (Radio Shack). This one lists the wattage at 140/100. It also uses a wedge base lamp. number on the lamp looks like 194 or maybe 1194. I look that up sometime, but i measured the voltage at the terminals and its 120 (wired parallel to the primary windings).
The amazing thing to me is how much this matters to me.
best to all
Tom
The amazing thing to me is how much this matters to me.
best to all
Tom
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