KD2AVU vox interface

1 month ago

Profile:Slow Scan Tv (SSTV) & digital mode interface radio to computer with VOX.

Open source license: Public Domain

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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.

Documents

PCB_KD2AVU vox interface

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BOM

ID Name Designator Footprint Quantity
1 1u C2,C3,C5,C6,C8 CAP-D5.0×F2.0 5
2 22uf C1,C4 CAP-D5.0×F2.0 2
3 0.1uf C7 RAD-0.1 1
4 1N4007 D1,D2,D3 DO-41_BD2.4-L4.7-P8.70-D0.9-RD 3
5 rad Mic J2 HDR-M-2.54_1X1 1
6 Rad Mic J3 HDR-M-2.54_1X1 1
7 PC Mic hot J4 HDR-M-2.54_1X1 1
8 PC Mic Gnd J5 HDR-M-2.54_1X1 1
9 PTT J6,J7 HDR-M-2.54_1X1 2
10 Rad Out J8 HDR-M-2.54_1X1 1
11 Rad out J9 HDR-M-2.54_1X1 1
12 Man PTT J10 HDR-M-2.54_1X1 1
13 Man PTT Gnd J11 HDR-M-2.54_1X1 1
14 5V +ve J12 HDR-M-2.54_1X1 1
15 5v -v J13 HDR-M-2.54_1X1 1
16 PC Spk J1,J14 HDR-M-2.54_1X1 2
17 BS4-5S-C20 K1 RELAY-TH_BS4-XXS-C20 1
18 5v Led + LED+1 HDR-M-2.54_1X1 1
19 LED -Ve LED-1 HDR-M-2.54_1X1 1
20 Led Tx + LEDTX1 HDR-M-2.54_1X1 1
21 LED Tx Cath LEDTX-VE1 HDR-M-2.54_1X1 1
22 Q2 Q2 TO-92-3_L5.1-W4.1-P1.27-L 1
23 Q1 Q3 TO-92-3_L5.1-W4.1-P1.27-L 1
24 4k7 R2 R_AXIAL-0.4 1
25 330k R3 R_AXIAL-0.4 1
26 47k R4 R_AXIAL-0.4 1
27 2k2 R6 R_AXIAL-0.4 1
28 1k R5,R7,R8,R13 R_AXIAL-0.4 4
29 1k R10 RES-ADJ-TH_3P-L9.5-W4.85-P2.50-BL-BS 1
30 50k R12 RES-ADJ-TH_3P-L9.5-W4.85-P2.50-BL-BS 1
31 5K R9,R14 RES-ADJ-TH_3P-L9.5-W4.85-P2.50-BL-BS 2
32 600:600 Ohm T2,T3 1:1 TRANSFORMER 2

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周一至周五 9:00~18:00
  • 0755 - 2382 4495
  • 153 6159 2675

服务时间

周一至周五 9:00~18:00
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