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STD KD2AVU vox interface
KD2AVU vox interface
License
Public Domain
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Update time：
2024-11-05 01:35:30
Creation time：
2021-04-29 04:03:26
Description
Description
Audio between radio receiver/transmitter isolated by 2 * 600/600 ohm transformers with vox circuit for push to talk operation. Vox delay can be set by R12, audio from radio receiver to computer is adjusted by R14, computer speaker output audio adjusted by R10, vox gain adjusted by R9. The vox circuitry is powered by computer USB 5v. This circuit can be used to decode slow scan TV, digital modes or can be used to computer audio out over the radio via the microphone connection.
Design Drawing
Design Drawing
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| ID | Name | Designator | Footprint | Quantity | Contributor | SMT Type | |
|---|---|---|---|---|---|---|---|
| 1 | 22uf | C1,C4 | CAP-D5.0×F2.0 | 2 | LCEDA_Lib | CE_TH_D5.0×F2.0_EU | |
| 2 | 1u | C2,C3,C5,C6,C8 | CAP-D5.0×F2.0 | 5 | LCEDA_Lib | CE_TH_D5.0×F2.0_EU | |
| 3 | 0.1uf | C7 | RAD-0.1 | 1 | LCEDA_Lib | C_RAD-0.1_US | |
| 4 | 1N4007 | D1,D2,D3 | DO-41_BD2.4-L4.7-P8.70-D0.9-RD | 3 | LCEDA_Lib | 1N4007 | |
| 5 | PC Spk | J1,J14 | HDR-M-2.54_1X1 | 2 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 6 | rad Mic | J2 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 7 | Rad Mic | J3 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 8 | PC Mic hot | J4 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 9 | PC Mic Gnd | J5 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 10 | PTT | J6,J7 | HDR-M-2.54_1X1 | 2 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 11 | Rad Out | J8 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 12 | Rad out | J9 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 13 | Man PTT | J10 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 14 | Man PTT Gnd | J11 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 15 | 5V +ve | J12 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 16 | 5v -v | J13 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 17 | BS4-5S-C20 | K1 | RELAY-TH_BS4-XXS-C20 | 1 | LCSC | BS4-5S-C20 | |
| 18 | 5v Led + | LED+1 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 19 | LED -Ve | LED-1 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 20 | Led Tx + | LEDTX1 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 21 | LED Tx Cath | LEDTX-VE1 | HDR-M-2.54_1X1 | 1 | LCEDA_Lib | HDR-M-2.54_1x1 | |
| 22 | Q2 | Q2 | TO-92-3_L5.1-W4.1-P1.27-L | 1 | LCEDA_Lib | 2N3904(TO-92) | |
| 23 | Q1 | Q3 | TO-92-3_L5.1-W4.1-P1.27-L | 1 | LCEDA_Lib | 2N3904(TO-92) | |
| 24 | 4k7 | R2 | R_AXIAL-0.4 | 1 | LCEDA_Lib | R_AXIAL-0.4_EU | |
| 25 | 330k | R3 | R_AXIAL-0.4 | 1 | LCEDA_Lib | R_AXIAL-0.4_EU | |
| 26 | 47k | R4 | R_AXIAL-0.4 | 1 | LCEDA_Lib | R_AXIAL-0.4_EU | |
| 27 | 1k | R5,R7,R8,R13 | R_AXIAL-0.4 | 4 | LCEDA_Lib | R_AXIAL-0.4_EU | |
| 28 | 2k2 | R6 | R_AXIAL-0.4 | 1 | LCEDA_Lib | R_AXIAL-0.4_EU | |
| 29 | 5K | R9,R14 | RES-ADJ-TH_3P-L9.5-W4.85-P2.50-BL-BS | 2 | LCSC | 3296W-1-502 | |
| 30 | 1k | R10 | RES-ADJ-TH_3P-L9.5-W4.85-P2.50-BL-BS | 1 | LCSC | 3296W-1-502 | |
| 31 | 50k | R12 | RES-ADJ-TH_3P-L9.5-W4.85-P2.50-BL-BS | 1 | LCSC | 3296W-1-502 | |
| 32 | 600:600 Ohm | T2,T3 | 1:1 TRANSFORMER | 2 | vfrc29 | 600:600 Ohm 1:1 EI14 Isolation Audio Transformer | https://www.amazon.com/Pcs-Pack-600-Transformer-Transformers/dp/B078SW7PNN |
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