Disassembled and compared two pulse soldering irons. Surprised by the second, it turned out to be dual-mode

Somehow I needed to solder the wires, and noted with regret that half of my devices were out of order, and I forgot to install a new sting on the old pulse one instead of the burned out one. I decided to buy a soldering iron, the new "impulse" was suspiciously small and compact.

But the salesperson (a practicing electrician) assured that it works perfectly and is in demand by techies. He explained that the instrument has an initial heating, and when the button is pressed, it heats up to the maximum temperature, which is inside, he does not know. It seemed strange to me, I decided to disassemble the old and the new, compare.

Old impulse

The Soviet instrument consisted of a transformer with primary and secondary coils. A sting made of thin copper wire 1.5-2 mm2 was attached to the secondary winding at the end of the copper rods.

The soldering iron was "started" through a microswitch, powering the transformer, and a backlight lamp, the tip warmed up to operating temperature in 5-7 seconds. Everything is simple and straightforward.

New apparatus

Disassembling the new thing, I expected to see the electronic filling, which allowed the sting to quickly heat up, but it was not there. There was a heating element in the form of a ceramic rod.

Standby temperature (30 W mode) appeared when voltage was applied to the heater through the diode, which cut off half the period and lowered the voltage. And when the microswitch was pressed, the diode was short-circuited (the voltage increased) and the heating element came out at full power (130 W). It turns out heating occurred stepwise, not impulsively, So it goes. The soldering iron, in any mode, reached operating temperatures in 7-8 minutes.

Soldering comparison

I decided to check and tin the two ends of the wires, the old one coped quickly (which means more powerful), the new one was a little slower, but also normal. I will not say anything bad about the new thing, it is an easy and convenient tool, only the backlight is missing. What kind of soldering irons do you use?

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