Transcript MARS Radio Play Days

Softrock 20m SDR RX Buildathon
Radio Play Days
11 July 2009
7/8/2015
MARS Buidathon 11 Jul 2009
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The Circuit
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The kit
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Stages of the Build
1.
PS – Power Supply
2.
LO – Local Oscillator
3.
DIV – Dividers/Phasers
4.
OPAMP – Operational Amplifiers
5.
BPF – Bandpass Filter
6.
MIX – Mixer
7.
CONN – Connect and go
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2 ceramic caps; 1 SMT cap; 1 diode; 1 TO-92 voltage regulator; 9V power lead
Smoke Test Station
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3 ceramic caps; 1 SMT cap; 2 transistors; 7 resistors; 1 XTAL
Smoke, Frequency Test Stations
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7 SMT caps; 2 SMT ICs
SMT, Smoke, and Frequency Test Stations
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3 ceramic caps; 8 resistors; 1 SMT IC
SMT, Smoke, and Op-Amp Test Stations
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2 ceramic caps; 1 coil; 1 transformer
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2 ceramic caps; 2 resistors
Smoke Test Station
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Stereo cable /plug (or jack); antenna coax; PC; software
Final Test Station
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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
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Builder’s Station
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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)
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Builder Station Infrastructure
• See Infrastructure Details
• Checklist:
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☐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)
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Process – Pre-Build Day
• Before build day, each registered builder does prepwork:
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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”
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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
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Smoke Test Elmer Station
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Smoke Test Procedure
Start
Select
Resistor
1k
100
Record
Limited
Value”
Press
“TEST”
Record
Unlimited
Value
DMM On
< Nominal Value
Connect
Board
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Current vs.
Nominal
>= Nominal Value
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DMM OFF,
Stop
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Frequency Test Elmer Station
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SMT Elmer Station
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Op-Amp Test Elmer Station
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Inductors Elmer Station
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Final Test Elmer Station
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Rework Elmer Station
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