Michael McShan <n5jky@...>
Good morning all,
I hope everyone got to have some radio fun this weekend. I operated SOTA from Mount Scott in the Wichita Mountains and made 40 qsos. Good day for me. :-)
So, Pig Rig #181 is almost finished (I know, I'm slow). I was testing the receiver when connected to the antenna, and the rig receives well but the AGC seemed like it was not working (I was getting huge, sudden shifts in audio volume). I then remembered a debugging technique that told to me years ago (I think by David WN5Y) that came to the rescue and thought I'd pass it on if it helps anyone.
The trick is to hold the printed circuit board in front of a good light source (desk lamp, whatever) and look for places where the light shines through. Using that trick, I discovered that one end of D4 had never been soldered. When fixed, the receiver works as it should.
Respectfully submitted to my esteemed colleagues and oink oink,