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Atten 937B - ESD Safe!

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Hi

Not a full review (and who cares anyway? It's just another clone...), but just a few photos for amusement. I took delivery of this soldering iron today, so in the spirit of Dave J, I took it apart. Just as well I did - the earth lead which should have been soldered to the PCB had become detached. I've included a few photos below. It seems odd that they should have gone to the trouble of fitting a power connector, and then soldered the earth directly to the board. Or not, as the case may be. There's also a missing component labelled 'RE'. Not sure what that's about. There's some very ham-fisted efforts to beef up some of the traces with solder. The effect is of a pigeon with a bowel disorder.

The only clever bits are a BT136 triac, LM358 dual op-amp and 2N3906 transistor. All bleeding edge stuff. The good news is that I could replace every component on the board with the contents of my junk box. On the other hand I couldn't buy the hardware for the price.

What a shame the Hakko fx-888 isn't a sensible price in the UK. I couldn't justify four times the price of this Atten for my use.

Cheers
John

(Edited to correct the product name - it's a 93*7*B. What a numbskull.)

T4P:
Where did my post go ?
It makes me feel like Atten thinks earth's not necessary on their stuff .
Some of their 858D comes with the earth disconnected .

amyk:
Looks like the "standard" 2 opamps +  PNP + triac controller a ton of other clones use too... nothing special about it. A schematic is floating around here if you want to know where RE connects across.

T4P:

--- Quote from: amyk on April 12, 2012, 10:30:37 am ---Looks like the "standard" 2 opamps +  PNP + triac controller a ton of other clones use too... nothing special about it. A schematic is floating around here if you want to know where RE connects across.

--- End quote ---

This is the original schem : https://www.eevblog.com/forum/product-reviews-photos-and-discussion/atten-936b-esd-safe!/?action=dlattach;attach=23152

saturation:
Yet, this fellow raves for Atten:

http://www.eham.net/reviews/detail/9839

I think he is the same ham who is an RF engineer who has had good experiences with an Atten scope, already with its known flaws.


Teardown:

http://www.flickr.com/photos/37321226@N03/with/6084346297/

I guess a bottom line, is testing its heating quality.  Does it come close to an IPC station?  If so, it would be worth buying and doing fix ups.

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