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Std EditionAF7KR Step Attenuator

License: CC-BY 3.0

Published Time:2019-08-21 04:55:19
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Description

Poor ham's step attenuator using 0.1" jumpers as switches. I glued together 2 jumpers with superglue. Resistor values are from E24 5% row.

Update 10-14-2019: Built 3 boards. There is no significant feedthrough up to 2GHz. Attenuation flatness is ok up to about 400-500MHz, then inductance of the "loops" formed by the jumpers and resistors causes significant excess attenuation.

ID Name Designator Footprint Quantity
1 CONREVSMA009 J1,J2 CON-SMA-EDGE 2
2 Header-Male-2.54_2x2 P1,P2,P3,P4,P5,P6,P7,P8 HDR-TH_4PIN-V-ROW2-COL2-MALE-PITCH2.54 8
3 62 R1,R3,R4,R6,R7,R9 1206 6
4 240 R2,R5,R8 1206 3
5 100 R10,R12,R13,R15 1206 4
6 68 R11,R14 1206 2
7 180 R16,R18 1206 2
8 30 R17 1206 1
9 300 R19,R21 1206 2
10 18 R20 1206 1
11 910 R22,R24 1206 2
12 5.6 R23 1206 1

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