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STD PCB- QRM Eliminator

License: Public Domain

Mode: Editors' pick

Cloned from QRM Eliminator

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Update time: 2022-03-08 14:25:17
Creation time: 2020-05-10 10:28:30
Description
QRM Eliminator based on design by RA0SMS and tested by Z32U. This has been built on breadboard and tested (10 May 2020) PCBs ordered this version has one error on the board around the RF sense capactitor and the tracks are a bit close for 100W around the relay otherwise OK.
Design Drawing
schematic diagram
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PCB
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ID Name Designator Footprint Quantity
1 10nf C40,C25,C41,C32,C24 2.5MM CERAMIC CAP 5
2 680pF C39,C42,C28 2.5MM CERAMIC CAP 3
3 100nf C46,C43 2.5MM CERAMIC CAP 2
4 BC549CG Q14 BC547 1
5 47uF C38 B_CAP_ELECTROLYTIC_5.08MM 1
6 1N4148 D19,D6,D11,D18,D20,D14,D15,D17 DIODE_DO-41_SOD81_VERTICAL_ANODEUP 8
7 IRF520 N-CHANNEL Q12 221A-06 1
8 68.1K R25,R26 0.25W-RESISTOR-VERTICAL 2
9 33u C44 B_CAP_ELECTROLYTIC_5.08MM 1
10 BC547BTA Q8 TO-92-3_L4.8-W3.7-P2.54-L 1
11 RF-ENABLED JP2 JUMPER2 1
12 1K R36,R32,R31,R28,R19,R27,R45,R48,R44,R46 0.25W-RESISTOR-VERTICAL 10
13 100K R16,R49 0.25W-RESISTOR-VERTICAL 2
14 3k3 R40,R20 0.25W-RESISTOR-VERTICAL 2
15 10K R22,R43 0.25W-RESISTOR-VERTICAL 2
16 J113 Q9,Q10,Q11 TO-92-3_L4.9-W3.7-P1.27-L 3
17 100pf C36,C35,C34,C30,C45 2.5MM CERAMIC CAP 5
18 1nf C37,C31 2.5MM CERAMIC CAP 2
19 10pf C26,C29,C27 2.5MM CERAMIC CAP 3
20 1:10 T2 TORROIDAL CORE JOULE THEIF 1
21 30K R47 POTENTIOMETER_TRIMMER_VISHAYSPECTROL_ECONTRIM-TYPE36M 1
22 P-CHANNEL Q7 TO-220-3_L10.0-W4.5-P2.54-L 1
23 1mH L2 NEOSID_INDUCTOR_MA-BS75 1
24 1n1008 D24 DIODE_DO-41_SOD81_VERTICAL_ANODEUP 1
25 1n4148 D23 DIODE_DO-41_SOD81_VERTICAL_ANODEUP 1
26 100k R39 0.25W-RESISTOR-VERTICAL 1
27 G2R-2-12VDC RELAY2 RELAY-TH_G2R-2 1
28 1K R18,R21 RES-TH_RK09K1110A0J 2
29 5K R23,R24 RES-TH_RK09K1110A0J 2
30 U7 RX JUMPER2 1
31 Power LED PWRLED,LOW-Z,HI-Z JUMPER2 3
32 TX LED TXLED JUMPER2 1
33 ANTENNA ANT JUMPER2 1
34 PTT PTT JUMPER2 1
35 Power PWR JUMPER2 1
36 1nF C33 2.5MM CERAMIC CAP 1
37 LM393 U1 DIP-8_L9.4-W6.4-P2.54-LS9.1-BL 1

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Build Notes Version 1 (Updated Nov 2020).pdf

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