The whole design is modular, parametric (cost and others), field repairable,
and super extensible. It is almost trivial to add support for more FSK digital modes
.
The Easy-Transceiver
hardware works with the native Hybrid FT8 Radio
Android app, and also with WSJT-X (running on RPi).
The Easy-Transceiver
system can be built for around 3000 INR (~40 USD) or
less. We are working on reducing the cost to 2300 INR ;)
Author 1: LU2HES - https://github.com/agustinmartino
Author 2: Dhiru Kholia (VU3CER) - https://www.qrz.com/db/VU3CER/
TX chain:
RX chain (Easy-uSDX - optionally headless):
QSO(s):
QSOs over 15000 kms were made using this HW with PA150 (with around 37W ERP).
This will need a HF RF PA in most cases to be usable on the air.
UPDATE (January 2022): Check out our cost-effective, and robust HF PA system.
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Use Python 3.10.x for maximum compatibility.
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Setup dependencies.
pip install -r requirements.txt
Check out our cost-effective, and simple T/R switch design.
Are you hearing broadcast AM signals in the background of the uSDX receiver? If
yes, a simple BCI filter
can solve this problem easily enough.
Checkout the RX BCI Filter included in this repository.
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High Quality Female to Female Jumper Wire - 2500mA (Project Point)
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Female and male berg strip
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Arduino Nano v3 board - 450 INR - We will eliminate this requirement soon
-
SN74CB3T3253DR (SOIC-16, Semikart) - ~200 INR
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Bunch of 100nF MLCC - 25 INR ('Emerging Technologies' Store -> ET)
-
Bunch of 10nF MLCC - 10 INR
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Bunch of 1nF MLCC - 20 INR
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4 x 470nF MLCC - 10 INR
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1 x 1N5819 - 2 INR
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1 x 1N4007 - 2 INR
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1 x 7805 Linear Regulator - 15 INR
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2 x 100uH inductor - 12 INR
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Si5351 Module - 470 INR (no delicate soldering required!)
- Cheaper to get MS5351M from LCSC (in bulk for more experiments) - <= 100 INR
-
Bunch of 10k resistors (MFR, ET / Project Point) - 25 INR
-
Bunch of 1k resistors - 10 INR
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1 x 1k 0.5W resistor - 5 INR
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1 x 470 0.25W resistor - 5 INR
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2 x 82k 0.25 resistor (MFR) - 5 INR
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4 x 100 Ohm resistor (MFR) - 5 INR
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1 x 3.5mm Stereo Socket ('PJ-307', https://www.electroncomponents.com/Stereo-Socket-3.5mm-connector-pcb) - 12 INR
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BCI Filter BOM - 2 x 2.2nF ceramic capacitor, 2 x 820pF (can be resistor shaped!), 3 * 2.2uH inductor axial
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2 x SMA connectors (https://www.ktron.in/, SMA Straight - Female - Vertical Mount) - 50 INR
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ATmega328P (DIP-28) - 225 INR
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20 MHz crystal - 10 INR
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LM4562NA - 220 INR (Semikart) OR NE5532AP (130 INR from Semikart, 30 INR locally from https://rarecomponents.com)
The
NE5532
is widely faked - even https://www.electronicscomp.com/ sells a cheap knockoff!TIP: Get
TI make NE5532
from https://rarecomponents.com/. -
Misc: Copper clad board (glass epoxy one), Relimate male connectors + female cable, Male berg strip, Female-to-female dupont cables
Get from https://www.electronicscomp.com/ and https://projectpoint.in/ shops.
-
Total: Around 1500 to 1600 INR
-
https://robu.in/ (https://www.ktron.in/ has better pricing at times)
-
https://www.electronicscomp.com/ (2.2uH Inductor)
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https://projectpoint.in/ (222 MLCC, 820pF MLCC)
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https://www.electroncomponents.com/2.2uh-inductor-inductance-coil (2.2uH Inductor)
Useful commands:
pacmd load-module module-null-sink sink_name=Virtual0
pacmd update-sink-proplist Virtual0 device.description=Virtual0
pacmd update-source-proplist Virtual0.monitor device.description=Virtual0
Use Gqrx and WSJT-X with a SDR device for initial frequency adjustment / calibration. This is essential for WSPR functionality. FT8 is more robust/tolerant of frequency deviations due to a much larger RX window.