PCB- QRM Eliminator

Ongoing

STD PCB- QRM Eliminator

License: Public Domain

Mode:

Editors' pick

Cloned from QRM Eliminator

3.9k
1
1
3

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

（ 1 / ）

Combined Eliminator+RF Sensing Controller copy
Open in Editor

PCB

（ 1 / ）

Second Attempt PRE GND PL
Open in Editor
Second Attempt
Open in Editor
Third Attempt
Open in Editor

The preview image was not generated, please save it again in the editor.

BOM

BOM download Purchase Parts

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