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STD Transmitter Tuning Aid

License: TAPR Open Hardware License

Mode: Editors' pick

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Update time: 2023-12-22 21:06:19
Creation time: 2018-02-17 19:34:06
Description
This is a tuning aid, designed to assist in tuning up CW and SSB amateur radio transmitters and limiting the risk of damage by transmitting at a low duty cycle. It is similar to the "Woodpecker" Tuning Aid described in reference [2]. This design is unique in that it includes both SSB and CW tuning aid circuits in a single unit. The design is flexible and can be assembled in different ways depending on what features are needed.
Design Drawing
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ID Name Designator Footprint Quantity Mounted
1 390 R1,R3 AXIAL-0.3 2 Yes
2 1u C1 CAP-D3.0XF1.5 1 Yes
3 0.01u C2 RAD-0.1 1 Yes
4 9V V1 1X02_LONGPADS 1 Yes
5 22 R4 AXIAL-0.3 1 Yes
6 100u C3 CAP-D3.0XF1.5 1 Yes
7 1N4148 D2,D3,D4,D1 DO-35 4 Yes
8 SSB OUTPUT P1 HDR-1X2/2.54 1 Yes
9 NE555P U2 DIP-8 1 Yes
10 1k R6 AXIAL-0.3 1 Yes
11 47k R7 AXIAL-0.3 1 Yes
12 L7805ABV U3 TO-92 1 Yes
13 0.1u C5,C6,C4 RAD-0.1 3 Yes
14 POWER SW1 HDR-1X2/2.54 1 Yes
15 2N7000 Q1,Q2 TO-92(TO-92-3) 2 Yes
16 KEYER OUTPUT P2 HDR-1X2/2.54 1 Yes
17 10k R2 RES-ADJ_3386P 1 Yes
18 500K R5,R9 RES-ADJ_3386P 2 Yes
19 10K R8 AXIAL-0.3 1 Yes
20 1K R10 AXIAL-0.3 1 Yes
21 KEY SW2 HDR-1X2/2.54 1 Yes
22 POWER LED1 LED-3MM/2.54 1 Yes
23 330 R11 AXIAL-0.3 1 Yes
24 CW SW3 HDR-1X2/2.54 1 Yes
25 TONE SW4 HDR-1X2/2.54 1 Yes
26 74LS13 U1 DIP-14 1 Yes

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