SR-40 Folks,
Finished the mechanical assembly and posted a couple of pictures for show and tell.
The enclosure is an LMB CR-321. The board is mounted vertical for access to both sides. The supports are L-brackets made from some aluminum angle.
I need to do some rework on the one support. It hits the pads where the audio signals connect. Maybe an insulator too. The holes mounting the board were thread formed using a 4-40 screw. Don't tap the holes -- it removes the metal and the epoxy fiberglass won't hold a thread.
The LED is now panel mounted and DIP pins were used for the crystal and the two feedback capacitors for the oscillator. I used manhattan pads for the off-board connections.
I found that the use of very fine solder was much needed. The pads are small. The stuff I used is .015 silver bearing that I found at RS.
Tony Parks mounted the surface mount parts for me. My hands have gotten too shaky for that many pins that close together...[g].
Now to get it wired up and see if it really works!
Chuck Carpenter, W5USJ, Point, TX -|- Rains Co. -|- EM22cv -|- 72 es 73
50 years -|- 19 - K2OFN and 31 - W5USJ -|- Most fun = QRP since 1984.
www.w5usj.com hosted by Hamnutz.com -|- NeTxQRP www.netxqrp.com
