This project is a 30m Marker Oscillator with Key Switch.
The oscillator uses all SMD parts, except; the Voltage Regulator (LM7805), Switch, Crystal, Trim Cap, and the Antenna (the Cap with a lead sticking straight up) which are full size components.
It worked the first time and was on frequency with just a twist of the Trim Cap, it seems to be very temperature stable and hand capacitance does not seem to effect frequency. I am very pleased!
Solder Paste applied and Ready for SMD Parts
SMD Parts on, Ready for Oven or Soldering Iron, In my case I used a small tip soldering iron. That is the 2N3904 SMD oscillator in the centre. The thing that looks like a TO-92 transistor (see below) is the LM7805M voltage regulator.
Completed and Aligned to Frequency on 30m at 10.140100mHz,
at top of QRSS Segment and bottom of WSPR Segment.
at top of QRSS Segment and bottom of WSPR Segment.
- Project Done -
Time to Build, About 1 hour
Time to Build, About 1 hour
Hi Eldon,
ReplyDeleteNice to see that little rock in action!
73
Johan on5ex