Davac5: Difference between revisions
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[[Image:Davac5-oven.jpg|none|frame|Recommended assembly is stencil, paste and reflow oven]] | [[Image:Davac5-oven.jpg|none|frame|Recommended assembly is stencil, paste and reflow oven]] | ||
[[Image:Davac51_3.jpg|none|thumb|frame|800px|Version 5.1 with optional USB-A]] | |||
[[Image:Davac5_RCA.jpg|none|thumb|frame|400px|OK1RCA]] | |||
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==Features== | ==Features== | ||
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* '''CW''' - CW output to key to the radio | * '''CW''' - CW output to key to the radio | ||
* '''REC''' - Recording input to record band traffic | * '''REC''' - Recording input to record band traffic | ||
==Example for IC7400== | |||
[[Image:Davac5-IC7400.png]] | |||
==Yaesu== | |||
When use dynamic microphone, cut JP2 to break DC bias. | |||
==LEDs== | ==LEDs== | ||
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==Parts== | ==Parts== | ||
{{Download|Davac51-bom.csv}} Bill of material for [http://tme.eu tme.eu]. | {{Download|Davac51-bom.csv}} Bill of material for [http://tme.eu tme.eu] . | ||
(not including cables) | (not including cables) | ||
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[[Image:Davac5-tucnak.png|none|frame|EEPROM edit in Tucnak]] | [[Image:Davac5-tucnak.png|none|frame|EEPROM edit in Tucnak]] | ||
==Post production inspection== | |||
[[Image:Davac51-qc.jpg|none|thumb|none|600px|Test points]] | |||
# Connect device to computer. The '''green LED''' lights up. | |||
# Start Tucnak, open contest. Go to [[Setup#CW keying|CW keying]], set '''Enable''' and '''Davac5'''. | |||
# Go to [[Setup#Audio|Audio]], Choose '''Davac 5.1''' for playback and capture. | |||
# Connect headphones to green jack (RADIO1). Run SSB CQ (You will hear it weak beacause impedance do not match headphones) | |||
# Take multimeter, set it to diode measure with buzzer. Look at image above. | |||
# Connect measuring needles to '''PTT''' points. Use '''TAB key''' in Tucnak to turn TX ON. The '''red LED''' lighs up and multimeter will '''beep'''. | |||
# Press '''ESC''' to RX. Connect needles to '''SSBW''' points. Buzzer will '''beep''' together with '''yellow LED'''. Run SSB CQ (F5), '''LED''' and '''buzzer''' will '''OFF'''. | |||
# During SSB CQ (or SSB recording) the '''green LED''' blinks. | |||
# Press '''Alt+M''' for CW. Connect multimeer to '''CW''' points. Run CW CQ (F5). Multimeter will '''beep''' together with '''blue LED'''. | |||
# Switch multimeter to Voltage measure to >3V range (4V, 20V...). Measure points '''BIAS'''. Voltage must be around '''3V'''. | |||
Latest revision as of 13:59, 8 August 2024
Davac 5 is new design of voice/SSB keyer for Tucnak. Although version 5 may appear to be a successor to version 4, is not true. It brings some advantages but also lacks some features.
To choose the version that best suits your requirements, please look at the table:
| Davac 5 | Davac 4 | |
|---|---|---|
| Size | small | bigger |
| Drivers required | No | Yes |
| Isolated | No, use the USB isolator | Yes |
| Band output | No | Yes |
| USB | Micro-B or A male | B |
| Soundcard | Is the soundcard itself | Uses PC soundcard |
| Audio cables | Shorter | Longer |
| Modulation relay | Solid SPST | Mechanical SPDT |
| Separated grounds | No | Yes |
Photos
Features
- Simple assembly
- All parts are SMD
- Designed for SMD reflow
- 3.5 jacks
- 3D printed box
- SMD LEDs + light guides on the top side
- power supply from USB
Circuit diagram
Notes
- R1, Y1, C2, C4 are not assembled in case of CM108B
- Althrough preferred chip is the CM108B, is possible to assembly older CM108
- The 93C46 is optional but recommended
- The JP1 - Turns ON/OFF the audio mixer - please consult datasheet of the CM108B
- I used LCBB-600 also instead of R9 and R16
- R11 and R17 are for possible coarse attenuation
Connecting to the radio
- MOD - Modulation output to the microphone input of radio
- PTT - Push to talk output to switch Radio to the transmit (active low)
- GND - One ground (ground plane on the bottom layer)
- MIC - Modulation input from headset
- BIAS - Microphone supply (from soundcard, not from radio)
- CW - CW output to key to the radio
- REC - Recording input to record band traffic
Example for IC7400
Yaesu
When use dynamic microphone, cut JP2 to break DC bias.
LEDs
- PWR lights up - Device is powered from USB
- PWR blinks - Soundcard is playing or recording
- PTT - Push to talk is active (SSB and also CW)
- CW - CW in the rhytm of Morse code
- MIC - The SSR connects MIC to the MOD (off/disconnected if CQ is active)
Trimmers
- CQ - Modulation level to the Transceiver
- REC - Record level attenuator
PCB
Gerber files to order PCB at Elecrow or jlcpcb.com.
Box
STL files for 3D printer.
Recommendations:
- Nozzle 0.4mm
- No support, maybe brim in case of bad adhesion
- Layer height - first 0.3mm, others 0.2mm
- PETG or PLA
Light guides are made from transparent PETG filament.
Parts
Bill of material for tme.eu .
(not including cables)
Set USB string to EEPROM
Only if the 93C46 is installed. From menu Setup, CW keying, Davac5 options.
Post production inspection
- Connect device to computer. The green LED lights up.
- Start Tucnak, open contest. Go to CW keying, set Enable and Davac5.
- Go to Audio, Choose Davac 5.1 for playback and capture.
- Connect headphones to green jack (RADIO1). Run SSB CQ (You will hear it weak beacause impedance do not match headphones)
- Take multimeter, set it to diode measure with buzzer. Look at image above.
- Connect measuring needles to PTT points. Use TAB key in Tucnak to turn TX ON. The red LED lighs up and multimeter will beep.
- Press ESC to RX. Connect needles to SSBW points. Buzzer will beep together with yellow LED. Run SSB CQ (F5), LED and buzzer will OFF.
- During SSB CQ (or SSB recording) the green LED blinks.
- Press Alt+M for CW. Connect multimeer to CW points. Run CW CQ (F5). Multimeter will beep together with blue LED.
- Switch multimeter to Voltage measure to >3V range (4V, 20V...). Measure points BIAS. Voltage must be around 3V.