[time-nuts] Subject: Re: Working with SMT parts

[Bob Albert]

Well I got my adapter boards from China and managed to build my first SMT project, a square wave generator for TDR use.  And it works!  The IC seems to run hot so I used my IR temperature measurement device and it checks out at about 37C, acceptable.  I can now drive a square wave at about 3 kHz into 50 Ohms.  The rise time isn't very short but I must have not used the best part for the generator.  Still, I can do some TDR experimenting as long as the line isn't too short.
Thanks to all for the ideas and encouragement.  I didn't use a microscope, mostly just a magnifier.  My tiniest soldering iron is a bit large but it did the job.
Bob
 

    On Saturday, August 13, 2016 4:06 PM, Michael Seibel <m.seibel at verizon.net> wrote:
 

 SMD  manual assembly / re-rework is easily accomplished wearing surgeons
glasses. Mine are KEELER with prescription lens and fold up 4 diopter
telescopes - for me perfect.

 

Also have a Nikon w/10 Mp digital camera; used only to document my findings
and eliminate any "arguments".  Seldom used.

Mike Seibel

m.seibel at verizon.net

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