RE: [Elecraft] Bad joints on KPA100 again - with photo...
I agree with all of the other comments about iron temperature. I used 800 degrees as standard and had no trouble. The only exception was when soldering the big final transistor pads. There I used the same temperature but switched to a wider tip since my regular tip couldn't transfer enough heat to overcome the considerable heat sinking effect of the wider pads. Another advantage of 800 degrees was that iron to part contact tip was minimized and that was all to the good. Bruce -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gerhard Schwanz Sent: Friday, January 28, 2005 9:25 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Bad joints on KPA100 again - with photo... Hi again, just took a photo. You see it seems to affect only a special kind of hole (see picture). You can see on the picture that other holes work well. http://www.gs-roboter.de/problem.htm Iron is temp regulated at 330 deg C. Same like before. I already changed iron and solder. To no avail. 73 again. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com __ Message transport security by GatewayDefender.com 9:54:16 AM ET - 1/28/2005 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Bad joints on KPA100 again - with photo...
Your iron is too cold, Gerhard! I never solder below 375C to 400C. What's happening to you is that any pads that are attached to the ground plane like the ones in your photo are losing too much heat to the ground plane for solder to flow. Ron AC7AC -Original Message- Hi again, just took a photo. You see it seems to affect only a special kind of hole (see picture). You can see on the picture that other holes work well. http://www.gs-roboter.de/problem.htm Iron is temp regulated at 330 deg C. Same like before. I already changed iron and solder. To no avail. 73 again. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Bad joints on KPA100 again - with photo...
Gerhard, The pads in your photo appear to be ground-plane pads. Ground-plane pads require greater heat energy to solder, because the heat is absorbed and radiated by the larger surface area. Increasing you soldering iron temp to about 426 Deg C (800 Deg F) will solve this problem. -- 73, Rod N0RC - Original Message - From: "Gerhard Schwanz" <[EMAIL PROTECTED]> To: Sent: Friday, January 28, 2005 7:24 AM Subject: [Elecraft] Bad joints on KPA100 again - with photo... Hi again, just took a photo. You see it seems to affect only a special kind of hole (see picture). You can see on the picture that other holes work well. http://www.gs-roboter.de/problem.htm Iron is temp regulated at 330 deg C. Same like before. I already changed iron and solder. To no avail. 73 again. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Bad joints on KPA100 again - with photo...
Looks like the pads you are having problems with are connections to a ground (or power) plane. These often require more heat than a pad that is connected to a trace since the plane "wicks" the heat away. 73 Bob, WB3FXC > Subject: [Elecraft] Bad joints on KPA100 again - with photo... > > > Hi again, > > just took a photo. You see it seems to affect only a special > kind of hole (see picture). You can see on the picture that > other holes work well. > > http://www.gs-roboter.de/problem.htm > > Iron is temp regulated at 330 deg C. Same like before. I > already changed iron and solder. To no avail. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Bad joints on KPA100 again - with photo...
Hi again, just took a photo. You see it seems to affect only a special kind of hole (see picture). You can see on the picture that other holes work well. http://www.gs-roboter.de/problem.htm Iron is temp regulated at 330 deg C. Same like before. I already changed iron and solder. To no avail. 73 again. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
