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New Kef's - Kef 107's!!
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canuckaudioguy
Junior Contributor 10+


Joined: 16 Apr 2013
Posts: 17

PostPosted: Tue Jun 25, 2013 4:50 am    Post subject: Reply with quote

proffski wrote:
You are a brave man! I once had to repair a Kube which had a noisy Op-Amp on it, I managed to damage the PCB tracks and I consider myself a 1st class solderer with over forty years worth of experience. I repaired the tracks I lifted but will think twice about accepting work on a KEF Kube in the future.

I raise my hat to you and offer my congratulation on the successful upgrade. Very Happy


Thanks! It actually was not as hard as I initially thought it was going to be. I was concerned the smaller solder joints were going to be tough to work with, but with the solder sucker I use (spring loaded) it allowed me to work very quickly. I used a heat of 450 F which I found perfect, it heated up the solder very fast and then I was able to get rid of it just as quickly. Having a steady hand and a nice quality iron helps too of course.

Then reflowing the new solder was very easy because it simply reflowed into the spot where the old solder was. I'm pretty inexperienced with soldering, so I don't think it's too challenging, I think you just have to be methodological about it. Either way, the cap change is pretty important. I would do that at the very least which is not as daunting as doing the KUBE upgrade. Smile
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proffski
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Joined: 22 Aug 2003
Posts: 1296
Location: Tewkesbury UK

PostPosted: Tue Jun 25, 2013 9:12 am    Post subject: Reply with quote

I did almost the same (Weller Soldering Iron) Solder sucker then solder wick as I suspect the sucker was partly responsible.
It was only two pads which lifted, the rest were fine, that was A Kube 200.
I vorked on another prior to that with no problems whatsoever, these days the eyesight is not what it used to be.

Happy Listening! Very Happy
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audiolabtower
VIP Contributor 500+


Joined: 06 Jan 2009
Posts: 544

PostPosted: Tue Jun 25, 2013 11:07 am    Post subject: Reply with quote

I upgraded a surface mount 8 pin for the first time ok, and the best advice I had was snip all the legs first, ditch the body, then solder suck the pins off the pads, then place the new chip and just heat the legs quickly adding no new solder. I thought if you had a really sharp set of snips, it might be the way to attack a normal IC too, just the leg remnant in the hole should suck out without too much heat on the pad? Never tried it yet on a normal though. Were the kubes before the days of surface mount?
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proffski
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Joined: 22 Aug 2003
Posts: 1296
Location: Tewkesbury UK

PostPosted: Tue Jun 25, 2013 11:17 am    Post subject: Reply with quote

I toyed with the idea of using high quality turned pin IC sockets, but chickened out... Sad
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Gary
Senior Contributor 200+


Joined: 07 Nov 2004
Posts: 275
Location: Toronto, Canada

PostPosted: Mon Jul 01, 2013 5:00 am    Post subject: Reply with quote

The best thing that I can do with solder is make sure I wear long pants.

Impressive, canuckaudioguy! Congratulations!
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