SDG #231 Why 2 Metcal GT120 Adjustable Temperature Soldering Stations??

Having two examples of the same soldering station on the bench is a rare chance to see how consistent a manufacturer really is, and that is the premise here with a pair of Metcal GT120 adjustable temperature stations. One arrived earlier, the other later in production, and the differences between them prove to be more than cosmetic.

The teardown compares internal construction between the two units, examining board layout, connector choices and how the power and control sections are handled. The focus then shifts to firmware: the two stations are not running the same version, which affects menu behaviour and how the user interface presents settings. That matters for anyone buying second hand or ordering now, since the experience depends on which revision arrives.

The thermal side is where the GT120 has to justify itself. Performance is measured against a Pace ADS200 and a JBC DDE, two obvious competitors in the same broad class, using a load test to see how well each holds temperature when heat is actually being drawn from the tip. Setpoint accuracy and stability are then checked directly, which reveals how closely the displayed figure matches reality and whether the two GT120 units agree with each other.

For buyers, the useful outcome is not merely a ranking. It is an understanding of where the GT120 sits on price against recovery, how its cartridge system compares in practice, and whether unit to unit variation or firmware revision should influence a purchase decision. The closing thoughts weigh those trade-offs for hobby and production use.