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Softrock 20m SDR RX Buildathon Radio Play Days 11 July 2009

Join the MARS Buildathon on 11 July 2009 for a fun-filled day of building your own Softrock 20m SDR RX. Learn about the different stages of the build and test your creation at various stations. Don't miss the opportunity to be a part of this exciting event!

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Softrock 20m SDR RX Buildathon Radio Play Days 11 July 2009

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  1. Softrock 20m SDR RX Buildathon Radio Play Days 11 July 2009 MARS Buidathon 11 Jul 2009

  2. The Circuit MARS Buidathon 11 Jul 2009

  3. The kit MARS Buidathon 11 Jul 2009

  4. Stages of the Build • PS – Power Supply • 2 ceramic caps; 1 SMT cap; 1 diode; 1 TO-92 voltage regulator; 9V power lead • Smoke Test Station • LO – Local Oscillator • 3 ceramic caps; 1 SMT cap; 2 transistors; 7 resistors; 1 XTAL • Smoke, Frequency Test Stations • DIV – Dividers/Phasers • 7 SMT caps; 2 SMT ICs • SMT, Smoke, and Frequency Test Stations • OPAMP – Operational Amplifiers • 3 ceramic caps; 8 resistors; 1 SMT IC • SMT, Smoke, and Op-Amp Test Stations • BPF – Bandpass Filter • 2 ceramic caps; 1 coil; 1 transformer • MIX – Mixer • 2 ceramic caps; 2 resistors • Smoke Test Station • CONN – Connect and go • Stereo cable /plug (or jack); antenna coax; PC; software • Final Test Station MARS Buidathon 11 Jul 2009

  5. Fixtures/ Elmer Stations • 1. Smoke Test – • DMM (test current draw, limited and unlimited) • 2. SMT (IC installation,) • Soldering; Heat gun; Tweezers; lighted magnifier; Panavise Jr. • 3. OpAmp Test (voltage gain) • DMM; 10k resistors; clip leads (builder “borrows” resistors/leads) • 4. Inductors (winding, tinning) • DMM; Clamps; Paste Flux/Solder; Soldering Iron; extra #30 Magnet Wire; extra cores; ruler • 5. Freq Test (LO, Div, phasing, audio I/Q) • Freq meter; Sig generator; dual trace scope • 6. Final Test (receiving) • PC with SDR software; Stereo Soundcard; 20m dipole antenna or hamstick • 7. Rework/Troubleshooting • Club-furnished solder (63/36 .015”), RG-174 Coax, spare parts • Solder wick, flux, heat gun, solder station MARS Buidathon 11 Jul 2009

  6. Builder’s Station • DMM • Soldering Station: .032” or smaller tip; .015” solder • Vise/Board Holder/Jig • Bright light, with magnification • Diagonal Cutters • Wire strippers • Tweezers recommended • Uncoated Cookie sheet: 8 x 10 or 11 x 14 w/grounding lead • Power strip • Safety glasses • 9V battery • Power leads (red/black, mate with 9V battery) • Stereo cable with stereo mini plug (or stereo jack) MARS Buidathon 11 Jul 2009

  7. Builder Station Infrastructure • See Infrastructure Details • Checklist: • ☐Kit, with Components Organized(We do not have spare kits! • ☐DMM(labeled with your call) • ☐Solder Station(labeled with your call) • ☐3rd Hand/Vise(labeled with your call) • ☐Light and Magnification(labeled with your call) • ☐Cookie sheet(labeled with your call) • ☐Tweezers • ☐Stripper • ☐Cutter • ☐Power Strip(labeled with your call) • ☐Connectors • ☐Grounding wire/clip • ☐PC(Optional)(labeled with your call) MARS Buidathon 11 Jul 2009

  8. Process – Pre-Build Day • Before build day, each registered builder does prep-work: • Reviews “Getting Ready” Instructions (downloadable PDF) • Studys & prints out documentation pages • Prints out Stage BOMs and organizes BOM components by stage • Obtains Builder Station Infrastructure Items • (Optional) Loads Winrad and Rocky to PC (if have PC) • (Optional) Winds coil and transformer at home before coming to Buildathon • Pack “build-day kit” MARS Buidathon 11 Jul 2009

  9. Process – Build Day • Each builder to a build station (“home”) • Builder goes through each stage: • PS: test at smoke test station; back to home for remaining tests. • LO: test at smoke test, freq test stations ; back to home for remaining tests. • DIV: go to SMT station for ICs (do caps at builder station); test at smoke test, freq test stations ; back to home for remaining tests. • OP-AMP: go to SMT station for IC; test at smoke test, OpAmp Test stations ; back to home for remaining tests. • BPF: wind coils, tin leads at Inductor Station ; back to home for remaining tests. • MIX: test at smoke test ; back to home for remaining tests. • EXT CONN: test at freq test station MARS Buidathon 11 Jul 2009

  10. Smoke Test Elmer Station MARS Buidathon 11 Jul 2009

  11. Smoke Test Procedure Start Select Resistor 1k 100 Record Limited Value” Press “TEST” Record Unlimited Value DMM On < Nominal Value Current vs. Nominal Connect Board DMM OFF, Stop >= Nominal Value MARS Buidathon 11 Jul 2009

  12. Frequency Test Elmer Station MARS Buidathon 11 Jul 2009

  13. SMT Elmer Station MARS Buidathon 11 Jul 2009

  14. Op-Amp Test Elmer Station MARS Buidathon 11 Jul 2009

  15. Inductors Elmer Station MARS Buidathon 11 Jul 2009

  16. Final Test Elmer Station MARS Buidathon 11 Jul 2009

  17. Rework Elmer Station MARS Buidathon 11 Jul 2009

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