SR-40 Folks,
The SR-40 is packaged, wired and is working thanks to some great help from folks on the lists. This thing is a great way to gain some familiarity with SDR operation.
I've updated the pictures and posted them on the Yahoo groups Softrock40 reflector.
The enclosure is an LMB CR-321. The board is mounted vertical for access (and viewing for show and tell) to both sides. The supports are L-brackets made from some aluminum angle. Had to do some trimming and insulating to clear the adjacent component pads.
The back panel includes the power connector, stereo cable jack and the BNC antenna jack. On the front panel are the LED power indicator and an ON/OFF switch. Now to try the 30 meter conversion.
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 solder that I found at RS.
Tony Parks mounted the surface mount parts for me and helped get the software running. Cecil provided the info on how to do the tuning. Several things weren't intuitively obvious to this COF...[g]
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
