Weller Instant Heat - Soldering Gun Resurrection

[@JamesE707]

I think I bought my Weller back in the early 1980s. Still working fine.

[@ChasLarge]

I think mine was a 1970's model. :D

[@JamesE707]

@@ChasLarge Your video has reminded me to open up mine for examination! Thanks.

[@englishrupe01]

Great job, thanks, Chas. I have actually just bought its big brother - a D550 with dual heat on the trigger press of 240/325 watts. I want it to do some plastic welding repairs, which these are great for, and using zip ties for filler material. Anyway, these are still really useful. Thanks for showing.

[@chadcat5286]

Cool video

[@roberthorseman7432]

I have a black version of this with two heat positions on the trigger I would say from the early eighties or mid seventies.

[@ChasLarge]

Yes, I believe there were several versions with changes like that, also changing the light from a bulb to an LED. This one, is a golden oldie.

[@cosmicallyderived]

Why was 57 Ohms a positive indication of functionality?

[@ChasLarge]

Hi, thanks for the comment. Good question. This was at 12:40 in the video. Essentially, the Heat Gun is a heavy duty 240V to 12V transformer, the bit being technically a short circuit across the output. 240V primary windings are usually low resistance. I was checking to make sure it wasn't OPEN and therefore MegOhms on the meter, and also checking it wasn't Short Circuit - Zero Ohms. So a reading of 57 Ohms, in my experience, was a good enough reading to indicate it was probably OK. Of course, there could have been shorted turns in the windings which would have meant either the fuse popping immediately or the gun overheating. I actually forgot to check the secondary winding. I assumed it would be OK, but I should have removed the bit and checked it. I was fortunate in that it too was OK. 🙂

[@Ankaphone]

@ChasLarge Hello, I have a question, it gave me a result of (11.5 Ω) with my tester. And the alarm from my tester is heard... why does that happen, what is the reason for that...??

[@valeriytolstoy3230]

Лучше Wellera только Weller, ни этого паяльника ни советского ЭПСИ 65 не "смогла" повторить вся китайская промышленость, все китайские импульсные паяльники расчитаны под железное жало которое после нескольких дней пользования обгорает и больше не лудится, а жало из меди они долго прогревают, и всё, в помойку, поэтому 30-40 летний ЭПСИ 65 стоит в два раза дороже новых китайских, а Weller ещё дороже.

[@ChasLarge]

Agreed.