SDG #250 Metcal GT4 Slim Handpiece, GT90 / GT120 GT Adjustable Soldering Station

Metcal’s GT series moved the company away from its long standing fixed temperature Curie point approach into adjustable territory, and the GT4 is the slim handpiece option that finally makes the platform competitive on ergonomics. This video examines how the GT4 behaves on both the GT90 and GT120 base stations, starting with the firmware update required before the newer pencil is recognised and will run properly.

The practical focus is on the things that matter day to day: how the slim grip compares in the hand against the larger original GT handpiece, how quickly the cartridges come up to temperature, and whether the thinner assembly gives up any thermal performance when working on larger joints. Temperature accuracy is verified against the station readout, which is worth noting for anyone relying on a station for repeatable process temperatures rather than an approximate dial setting.

Soldering segments cover through hole and surface mount work on a freshly assembled board, so that tip access, recovery under load and the cleanliness of the wetting behaviour with quality leaded solder can all be judged. Cartridge swapping is also demonstrated, which is a useful gauge of how quickly a user can move between a fine conical and a chisel or hoof tip mid job.

For buyers, the conclusion concerns positioning. The GT4 makes an already capable adjustable Metcal station much more pleasant for fine detail work, but the comparison with lower cost alternatives in the same performance bracket is the real deciding factor, and the closing assessment addresses exactly where the extra money goes.