Throw those bad soldering tips away ! - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 13th November 2011, 02:32 AM   #1
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
Default Throw those bad soldering tips away !

My soldering tip has been getting a bit worn and not soldering as well recently.
However I continued to use it.
I built up a class d 2092 amp and it immediately fried the 2092.
I couldnt see anything obvious so built up another which immediately did the same thing !

I inspected both and couldnt find anything obvious and I checked every resistor for value and they were ok.

I started to suspect poor chinese pcbs but they looked fine on close inspection.

Anyway after some long and hard inspection with a magnifying glass I spotted two resistors shorted together with the slimmest of solder slivers which poked 45 volts into teh 2092 input pin.
On the other board a transistor looked as if it was soldered but it wasnt making contact with the pcb. I redid the joint and then it was fine.

So for the price (2-99 a set) of a solder tip I lost a couple of hours having to fault find and a piar of irs2092's.. Needless to say I will bin poor performing bits a bit sooner next time.
  Reply With Quote
Old 13th November 2011, 02:51 AM   #2
just another
diyAudio Moderator
 
wintermute's Avatar
 
Join Date: Aug 2003
Location: Sydney
Blog Entries: 22
Bummer. I never appreciated how much difference a soldering iron makes (not just the tip) until I bought my Hakko. Wished I'd shelled out the money years earlier.

Goes with any tools, its amazing how much quicker and easier everything is with the correct tool for the job.

Good tip Nigel

Tony.
__________________
Any intelligence I may appear to have is purely artificial!
Some of my photos
  Reply With Quote
Old 13th November 2011, 02:59 AM   #3
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
I havent had that much luck with soldering irons, they dont seem to last long. Had 3 Maplin soldering stations and they all died in the power supply and went through bits very quickly.
My current iron is an Antex which has been pretty good despite only costing 7 and teh bits last a lot longer.

I find it a bit of a juggling act getting the right size bit. If the bit is small enough for IC's then it wont solder lugs on 10,000uF capacitors. Its annoying having to keep changing bit sizes.
  Reply With Quote
Old 13th November 2011, 03:08 AM   #4
djQUAN is offline djQUAN  Philippines
diyAudio Member
 
Join Date: May 2004
Location: manila
Send a message via MSN to djQUAN Send a message via Yahoo to djQUAN
Quote:
Originally Posted by wintermute View Post
Bummer. I never appreciated how much difference a soldering iron makes (not just the tip) until I bought my Hakko. Wished I'd shelled out the money years earlier.

Goes with any tools, its amazing how much quicker and easier everything is with the correct tool for the job.

Good tip Nigel

Tony.
exactly the same experience here too. A quality soldering station may cost some money but if you solder a lot (or build many kits) it will pay for itself in no time.

I use the "K" series tip (see attached pic) for my hakko. I find it nice for working on both SMD and large through hole parts just fine. Also great for removing solder bridges with the right technique.
Attached Images
File Type: jpg Hakko900MTK.jpg (15.1 KB, 495 views)
  Reply With Quote
Old 13th November 2011, 03:16 AM   #5
just another
diyAudio Moderator
 
wintermute's Avatar
 
Join Date: Aug 2003
Location: Sydney
Blog Entries: 22
yes changing bits is a pain (especially if you haven't let them cool down enough )

My hakko is an 80W temp controlled iron, I've had it now for maybe 8 years (and cost me $199.00) (I probably spent almost that much on cheap irons and tips the previous 15 years leading up to the purchase, and none of them came close to it for performance. Its a lot to spend on a soldering iron (which is why I didn't do so for a long time) but after I did spend it I felt it was worth every cent

I'm still using the original bits that came with it. No pitting at all, one though the inner sleeve has come loose and it doesn't transfer heat as well as it used to. All I generally do when soldering something big that sinks a lot of heat is to turn the temp up to about 450 deg and it cruises through

edit: interesting bit djQUAN!! looks like it could double as a hot knife too!

Tony.
__________________
Any intelligence I may appear to have is purely artificial!
Some of my photos

Last edited by wintermute; 13th November 2011 at 03:18 AM. Reason: add comment on djQUAN's bit
  Reply With Quote
Old 13th November 2011, 03:30 AM   #6
mp9 is offline mp9  United States
diyAudio Member
 
Join Date: Jun 2006
I'm terrible at soldering, got a Stahl temp controlled iron/station (Weller knock off), made a huge difference:

Stahl Tools TCSS Temp Controlled Soldering Station ESD Safe 374-200
  Reply With Quote
Old 13th November 2011, 05:41 AM   #7
GloBug is offline GloBug  Canada
Banned
 
Join Date: Jun 2011
Just sand the tip down once in a while.

My $30 Weller works fine, with the original tip, it has corroded down to 1/4 of it's original size. lol

The connection between the tip and the gun needs to be reset once in a while, turn it in and out a few times to renew the contact.

For big metal, I bring out the big Weller gun style iron, same thing here, the connections have to be redone once in a while or it does not get hot.

I would like a fancy soldering station too, aside from being adjustable, it's not any "better" as far as how it works.

A new tip won't do anything for a sloppy soldering job, no offence.

I bet you find that removing an old tip and putting it back in pretty much makes it work as new again.
  Reply With Quote
Old 13th November 2011, 07:27 AM   #8
mp9 is offline mp9  United States
diyAudio Member
 
Join Date: Jun 2006
Quote:
Originally Posted by GloBug View Post
I would like a fancy soldering station too, aside from being adjustable, it's not any "better" as far as how it works.
...that wasn't my experience, i tried a pencil stick Weller from Lowes and couldn't keep the solder flowing because it was always to hot or to cold. For me the temp controller regulator helped tremendously there.
  Reply With Quote
Old 13th November 2011, 11:52 AM   #9
ljm_ljm is offline ljm_ljm  China
diyAudio Member
 
Join Date: Sep 2006
We must have a 936 type of temperature control soldering pen.

It consists of DC low voltage driver fever. Won't produce static.

A quality medium 936 soldering pen is about 150 RMB. About 25 USD.
  Reply With Quote
Old 13th November 2011, 04:09 PM   #10
diyAudio Member
 
Join Date: Nov 2008
Location: Oakmont PA
I bought a $3 eBay made in China soldering iron just for big joints. It gets way too hot for normal use and I suspect will not last very long if really used often.

For the always on iron I used to use a diode in series with the AC line. It drops the temperature enough that the tip lasts a long time and it is still warm enough to solder properly.

The way you know you have the right temperature is when it takes 3 seconds per joint. Less and you are too hot, more too cool for words!

Be sure you know the difference between a constant temperature and a variable temperature soldering station. Both can be useful, but constant temperature requires less skill.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can bad soldering in a CD player cause fire? Stabby Digital Source 1 30th December 2010 05:24 PM
Soldering Tips Monjul Multi-Way 9 4th July 2010 08:43 PM
Soldering tips for soldering station BEST PRICE, FREE SHIPPING, 15% discount vtech9815 Vendor's Bazaar 0 27th January 2010 05:40 PM
Need help deciding on soldering station/tips Slick1 Equipment & Tools 5 21st December 2009 10:14 PM
Soldering Tips patherb Multi-Way 27 15th February 2009 12:21 AM


New To Site? Need Help?

All times are GMT. The time now is 05:05 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2