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Timebase

dmsmccann·Spectrum-Analyzer·timebase/timebase/timebase.kicad_pcb

Timebase PCB layout, top view — open source board by dmsmccann
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About the Timebase PCB

Timebase is an open source PCB design by dmsmccann, published on GitHub. It is a 2-layer board measuring 85.3 × 76.5 mm, with 53 components from 36 distinct parts.

Other key parts include the LM358P and LM358. By type, the board carries 33 resistors, 7 diodes, 6 capacitors, 4 connectors and 3 ICs.

It belongs with the test & measurement and rf & radio designs in this gallery.

From the project

Based on design by W7ZOI in 1998 QST

This repository contains a complete KiCad implementation of the famous W7ZOI Spectrum Analyzer design, originally published in QST magazine. The W7ZOI spectrum analyzer is a well-regarded amateur radio test instrument design that provides a cost-effective solution for RF spectrum analysis.

The W7ZOI Spectrum Analyzer is a superheterodyne spectrum analyzer designed for amateur radio applications. It provides frequency analysis capabilities across the HF and VHF bands, making it an invaluable tool for antenna analysis, filter characterization, and general RF measurements.

Main components on the Timebase

LM358PLM358

Timebase bill of materials (BOM)

53 components, 36 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM358P
LM358
U401
2
LM358
U402, U403
2
Conn_Coaxial
J8, J9
2
691137710002
Jack-DC
J402, J404
1
1N4148
D401
4
1N4148
D402, D404, D405, D408
1
1N4735A
1N4735
D403
1
1N4735
D406
1
CK06BX105K
1u
C401
1
226CKH050M
22u
C402
1
22u
C403
1
107CKE025MEM
100u
C404
2
100u
C405, C406
3
502-0308
10k
R3, R4, R6
1
502-0305
5k
R5
1
CFR-25JB-52-56K
56k
R401
1
CFR-25JT-52-680K
680k
R402
1
CFR-25JB-52-100R
100
R403
1
100
R404
1
CFR-25JB-52-2K2
2.2k
R405
Show 16 more
QtyPartRefs
3
2.2k
R406, R409, R410
1
CFR-25JB-52-4K7
4.7k
R407
1
CFR-25JB-52-1K
1k
R408
1
CFR-25JB-52-12K
12k
R411
1
CFR-25JB-52-15K
15k
R412
1
CFR-25JB-52-10K
10k
R413
5
10k
R414, R418, R419, R423, R425
2
15k
R415, R426
1
CFR-25JT-52-390R
390
R416
1
CFR-25JB-52-51R
51
R417
1
3296W-1-502RLF
5k
R420
1
CFR-25JB-52-6K8
6.8k
R421
1
CFR-25JB-52-240K
240k
R422
1
5k
R424
2
CFR-25JB-52-22R
22
R427, R428
1
CFR-25JB-52-470R
470
R429

Timebase design files

The KiCad project lives in the dmsmccann/Spectrum-Analyzer repository on GitHub; these links point at the commit this page was built from.

Timebase: common questions

How big is the Timebase PCB?

The Timebase measures 85.3 × 76.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Timebase?

53 components, from 36 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Timebase design files?

From the dmsmccann/Spectrum-Analyzer repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Timebase design in my own project?

The repository has no license, so all rights stay with dmsmccann. Use it as a reference, and ask the author before reusing the design.

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