Hakko fx-950 analog edition.

[riyadh144]

So I am really attracted to the analog fx-950, I really like it being analog.
I can buy it of ebay, but it says it is rated for 100V, it looks close enough to the 120V in the USA, but I am not really sure it will do it without a transformer.
Does anyone have any experience with that?

https://www.ebay.com/itm/HAKKO-FX-950-Soldering-iron-station-100V-2-pole-grounding-plug-FX950-01-Courier/313377231401?epid=1740121009&hash=item48f6bd1229:g:q~oAAOSw6bNf~D8J

Thanks
Riyad

[Mikek400]

Replying to old post just for reference in case someone else wants to know the answer to this.

Short answer is: Without modifying, no but it is easy to modify
                          Who doesn't like hacking?           

I recently bought a 100V  Hakko FX-950. Wanted a FX-951 but after using one a lot at work don't like the controls so decided to go for the analog and cheaper FX-950



Seemed to work ok on 120v at first. Then after a few minutes it shut off. Taking out tip etc didn't make it wake back up. Power off/on and it worked for a few minutes. Best guess is volt regulator is overheating, something is overcurrent or IC is deleting an error in how much it is heating up. This was quite a surprise to me since I've used plenty of 100V devices on 120V without issue or in some cases improved performance.

Measured voltage on transformer inside and was at 32VAC which is a bit high. Connected the FX-950 to a 100V step down transformer(105V measured) and got 28V. Put back together and works great on the step down transformer.

Not wanting to have to use my step down transformer all the time with this thing I decided to fix it. Thought about replacing the transformer but before investing another $30 on that (available from Hakko) I tried some properly sized magnet wire and wrapped it around the existing transformer about 15-20 times. Connected it such that it is subtracting voltage and got it to 28V same as connecting it to my step down transformer. 



Anyhow it works now without the step down transformer and it is a pretty easy mod. Although many might say it isn't a good solution. In that case you can buy the $30 transformer for 120V that Hakko sells. Don't have the P/N ready but found it before.
Suppose you could remove part of the winding in the existing transformer as well.  That was my first thought but I wanted to keep 100V capability since this iron may travel back to 100V land again with me.

If there is any interest I might post more detailed instructions although there isn't much to it.

[Mikek400]

There was another thread where "Attorney" went through the same problems I did with 120V on the FX-950,
He replaced the transformer with the Hakko OEM part it seems. Hakko part number B2836.

https://www.eevblog.com/forum/beginners/hakko-fx-950-line-voltage/

I found the correct transformer part number for 120V operation.  The replacement transformer is Hakko part number B2836.  I made a purchase through TEquipment.com.  Price was USD $26.  That's cheaper than the 120V to 100V converter I was considering and doesn't require tethering the Hakko 950 to another device. 

Paul