Description

FM stereodecoder board (best fit for Radiotehnika T101/T7111 tuners)

Direct replacement for SD-A-7 (СД-А-7) module to use stereo decoding with pilot tone in old USSR FM tuners like Radiotehnika T-101, T-7111 and similar. For direct replacement original connector should be used (old one or new).

This board can be used as decoder in any other FM analog radio projects, as decoding IC is in standard configuration.

After assembling and installation require to adjust threshold by trimmer for stable stereo mode.

About parts used.

Pads H1...H10 designed so they could fit to connector SNP40-10R (СНП40-10Р), if board used for SD-A-7 (СД-А-7) module replacement: . Board can be used w/o connector also, with wiring to mentioned pads.

Resistors: any THT 1/4W

LED: any THT red led d5mm

Trimmer: Bourns 3296W or similar

Electrolytics caps: any THT 16V+

C3 - any film capacitor 16V+

C1,C2,C5,C9 - any ceramic or film capacitors 16V+ X7R

IC - TA7343AP

Schematic and Layout

FM stereodecoder board V1.1

V1.1_schematics.docx

Download BOM(Bill of materials)

Jul 26,2026

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FM stereodecoder board (best fit for Radiotehnika T101/T7111 tuners)

Direct replacement for SD-A-7 module to use stereo decoding with pilot tone. Could be used as decoder in any other FM analog radio projects.

Published: Jul 26,2026

Standard PCB

BOM(Bill of materials)

PCBWay Donate 10% cost To Author

File Last Updated: 2026/07/27 (GMT+8)

File update record

2026-07-2712:09:08

Parts List (BOM) is updated.

Only PCB

PCB+Assembly

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