[Elecraft] K3 Speaker Amp - sub side inop

[Bill W4ZV]

Don Wilhelm-4 wrote:
> 
> There is a way to solder those small pitch ICs - just run a bead of 
> solder over all the pins, and then use solder wick to remove the 
> excess.  Only caution, all the leads must contact the pads at once for 
> this to work - remove ALL the solder from the pads first, and make 
> certain none of the leads on the new IC are bent.  If you can manage a 
> 3rd hand, a bit of pressure on the chip while doing the solder wick "mop 
> up" will help assure you do not wick solder that is between the pad and 
> the lead.
>   

A video is worth 1000 words:

http://www.youtube.com/watch?v=jlwoOetHAkU

The LM4950 pins have a pitch of 0.38mm.  The video guy said his pins were
~0.4mm.  His procedure is exactly what Don described above.  I've soldered
an AD9834 in KD1JV's ATS-3 transceiver pin by pin but those are wider at
0.65mm.  Using the above technique is definitely the way to go for very fine
pitches. 

73,  Bill

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