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Hakko FG-100

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linux-works:
anyone used one before?

they seem to be on ebay/china for $15 or less, yet the real unit, if bought via amazon (for example) is well over $200.

if anyone has a real one, I'd love to see what's inside.  I ordered one of the ebay versions and I'll do a teardown as soon as mine gets here.

it seems like its just a thermocouple and some simple controller, so I'm not at all sure what could demand a $200 price tag for this, other than market demand.

anyway, for $15 I added one to an order I was placing anyway, so I'll see what that $15 buys me.  it comes with those triangle flux capacitor looking things (lol) and I'm not sure why there are 3 leads on a thermocouple, but I'll soon find out.



nanofrog:
IIRC, the Red and Blue legs are what's measured, the third leg is just for mechanical stabilization so it doesn't rock/swing when you put the soldering tip to it in order to get good contact.

As per cost of the real thing, it seems you're paying dearly for the name in this case IMHO. Weller's even worse (~$700 for theirs).

linux-works:
ah, just found the eevblog threads on this (did not come up on search but did come up on google search).

what I'd like to find out, once I get mine, is if there is a simple jumper to change C to F or if its hardcoded per model.  there is a C and an F orderable model and they are not the same model #.

yeah, after reading a bit more, the 3 terms are just a 2 term K tcouple with a 3rd support wire.

I would not spend a lot on this.  never would I think to spend $200 on it!  but for $15, ok, I'll see what its about.

otoh, I already have a few tcouples and dmm's that read type-K's directly.  this was more an impulse buy from a vendor I already was placing an order with.  but might be an interesting tear-down.  I have not seen any schematics for this online and no high res photos of its insides, either, so I'll shoot some when I get it.

nanofrog:
Seem to recall a thread somewhere that showed how to change it from C to F, but not sure if this works on the copies or not. Also had tear down photos IIRC, so might be worth a search (might need to try some other names they're sold under, such as Lodestar).  ;

staxquad:

--- Quote from: linux-works on May 05, 2014, 03:31:39 pm ---ah, just found the eevblog threads on this (did not come up on search but did come up on google search).

what I'd like to find out, once I get mine, is if there is a simple jumper to change C to F or if its hardcoded per model.  there is a C and an F orderable model and they are not the same model #.

yeah, after reading a bit more, the 3 terms are just a 2 term K tcouple with a 3rd support wire.

I would not spend a lot on this.  never would I think to spend $200 on it!  but for $15, ok, I'll see what its about.

otoh, I already have a few tcouples and dmm's that read type-K's directly.  this was more an impulse buy from a vendor I already was placing an order with.  but might be an interesting tear-down.  I have not seen any schematics for this online and no high res photos of its insides, either, so I'll shoot some when I get it.

--- End quote ---


C* and F* swap, doesn't look like it, unless there's pins to short on the processor

to your dismay, you'll find that it works (for $200, Hakko removes the flux residue for you, for $15, you do it yourself)

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