SMT capacitors RE: [sdiy] Have you guys already used this ?

[George Hearn]

Worth mentioning that a tweezers vary massively in quality.  For SMD work
you really want a very good pair of tweezers (or a selection) designed
especially for the job.  It cost me a few quid to get a set admittedly but
in the end has been worth it (lasted 5 years probably do a lifetime).
George

-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of rdrake
Sent: 26 September 2008 21:40
To: dingebre at 3dphysics.net; synth-diy at dropmix.xs4all.nl
Subject: RE: SMT capacitors RE: [sdiy] Have you guys already used this ?

david,

just to be encouraging... i was very leery of SMD, but have now done a
couple of JH and CGS boards with SMD bypass caps they have been much easier
than i thot.  i use a toothpick rather than tweezers--position cap so one
end is on the solder blob and hold it down w/ toothpick, then melt the blob
and it settles right in... metal tweezers seemed to act as a heatsink and
made it harder to melt the solder blob.

good luck!
bbob

>----- ------- Original Message ------- -----
>From: "David Ingebretsen" <dingebre at 3dphysics.net>
>To: <synth-diy at dropmix.xs4all.nl>
>Sent: Fri, 26 Sep 2008 13:51:27
>
>Thanks George. That's the technique that I've seen
>recommended most often.
>These caps are ceramic, which is good then.
>
>I bought a bunch of extra to practice on first...
>
>David
>
>-----Original Message-----
>From: synth-diy-bounces at dropmix.xs4all.nl
>[mailto:synth-diy-bounces at dropmix.xs4all.nl] On
>Behalf Of George Hearn
>Sent: Friday, September 26, 2008 1:32 PM
>To: synth-diy at dropmix.xs4all.nl
>Subject: RE: SMT capacitors RE: [sdiy] Have you
>guys already used this ?
>
>Not sure what capacitors the design you're talking
>about uses but it's the
>film (polyester etc.) SMT capacitors that are most
>sensitive to heat.
>Ceramics are hard to hurt and electrolytics
>generally tend to be bigger and
>thus take longer overheat. The technique that works
>for me:
>1. Put a small amount of solder on one pad, 
>2. Hold the capacitor in place with tweezers and
>'reflow' the solder with
>your iron to hold the capacitor in position (takes
>only a second or two).  
>3. Then solder the other pad.	
>
>-----Original Message-----
>From: synth-diy-bounces at dropmix.xs4all.nl
>[mailto:synth-diy-bounces at dropmix.xs4all.nl] On
>Behalf Of David Ingebretsen
>Sent: 26 September 2008 20:11
>To: Synth-diy at dropmix.xs4all.nl
>Subject: SMT capacitors RE: [sdiy] Have you guys
>already used this ?
>
>On this note, I am going to be building a JH
>Frequency Shifter which uses
>some SMT capacitors. I've read they are vulnerable
>to overheating during the
>soldering. How how should I have my soldering iron
>when I'm soldering them?
>How sensitive are they? Is there a visual cue
>(beyond black and smoking)
>that I've overheated them?
>
>David
>
>-----Original Message-----
>From: synth-diy-bounces at dropmix.xs4all.nl
>[mailto:synth-diy-bounces at dropmix.xs4all.nl] On
>Behalf Of Csaba Zvekan
>Sent: Friday, September 26, 2008 7:14 AM
>To: Synth-diy at dropmix.xs4all.nl
>Subject: Re: [sdiy] Have you guys already used this
>?
>
>JB,
>
>In my opinion way too expensive . I have brewed my
>own little SMT oven  
>with a PIC and a GLCD displaying the temperature
>and controlling two  
>relays of a little pizza oven.
>
>Deleted....
>
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy