Hello everyone. I recently found a nice old Weller Magnastat TCP 24 50W iron with transformer base box at local flea market for 10€ so i didn't let the chance go away. It's exactly like the common green/blue Magnastat line but seems a bit earlier, probably from late 70s. Iron's handle is black and 24V transformer box dark blue. Type 21 021 - TCP 24V 50VA. The iron works well and do its job. Came with a "7" tip code type (370 C), measured the temp and it gets stable at about 360-380 C, so seems ok. You can clearly hear clicking sound from switch. For those who may don't know how they work, these are common Magnastat (Weller patent) irons with fixed controlled temp. Their mechanism is based on Currie Phenomenon. https://hackaday.com/2016/06/01/long-term-review-weller-magnastat-soldering-iron/ The transformer just provides the iron with 24VAC, nothing else. Not temp control stations here. The temp has only to do with the tip number type you use (types 6,7,8 are the most common). For type 7 you get 370C. My main concern is that the 24V transformer is noisy, laminations buzz pretty loudly. The trafo is unpotted. Is it smthng to worry about or just aging loose laminations buzz common issue? I was thinking of wax potting or putting it in a dedicated electrical varnish bath to eliminate. Any thoughts?