HF SDR(Software Defined Radio) transceivers

All published designs and materials are free for personal and non commercial use. Other use for commercial purpose are not allowed without permission of the author.

Low power SDR HF I/Q S/H (Sample and Hold) transceiver CW,SSB.- ADTRX1 from 30 kHz-35 MHz with external LO-part1

     HF SDR transceiver called ADTRX1 (analog + digital) is compilation of the  results  and previously published designs. ADTRX1 is working to the 35 MHz and it is a very simple and promising  design all with classic size thru holes components. It is very good introduction in to the new SDR technique of the HF transceiver design. Most of demanding specification for HF transceivers are in software now, not in hardware like in classic HF transceiver design. Part 1 is giving description main ADTRX1 board, results and basic connections

HF SDR transceiver ADTRX1-YU1LM part1.pdf

 

ADTRX1 SDR Transceivers  built by Andrey US5EQQ

ADTRX1 SDR Transceivers  built by Wolfgang DK2CQ

ADRX1-V1 SDR transceiver built by Gena UA6XW/9 with his PCB version

Low power SDR HF I/Q S/H (Sample and Hold) transceiver CW,SSB...- ADTRX1 from 30 kHz-35 MHz with external LO-control booards B1 and B2- part2    

     ADTRX1 SDR transceiver part 2 . In this article I am describing different possibilities with new control hardware boards B1 and B2. I made PCB corrections for ADTRX1 and new ADTRX1-1 version with 2 AF gain position like it is done in the SDR receivers DR2 ,DR2A.. . The receiving path in ADTRX1 is going always through the SB card and for transmission I am describing  here 3 ways how to perform it. First way is completely digital with using SB card only , second way is completely analog with built in hardware and third way is mixture solution partly digital partly analog hardware. In the moment when  I started design and experimenting with control  boards  there ware not  freeware software for transmission. Now we have few software and situation is a quite different. The readers can decide individually how to do transmission.

HF SDR transceiver ADTRX1-YU1LM part2.pdf  

 ADTRX1-1 SDR transceiver built by Danil UR3VCD

ADTRX1-1 SDR transceiver + input/output BP filters built by Serg UA3PRQ

 

ADTRX1-1 SDR transceiver with control boards B1 and B2 built by Gabriel Scevlik from Slovakia

Low power SDR HF I/Q S/H (Sample and Hold) transceiver CW, SSB.. - ADTRX1 from 30 kHz-  35 MHz with built in LO and control  board B3 and B4 -part 3

    Low power SDR HF I/Q S/H (Sample and Hold) transceiver based on use 74HC4053- ADTRX1 from 30 kHz-35 MHz with new boards B3 and B4. These new boards will enable easy RX/TX control interface with PC. Operation is possible on 3 bands harmonically related. The boards have built in 4 channel crystal oscillator  with QRP 5Wout power amplifier with LP/BP.

`HF SDR transceiver ADTRX1-YU1LM part3.pdf

ADTRX1 SDR transceiver modified and built by Alex EU1ME

ADTRX1 SDR transceiver built by Eugene RU6AI

SDR HF I/Q S/H (Sample and Hold) Transceivers - ADTRX-2  30 kHz -51 MHz and Mono-band One Board QRP 5W SDR HF  Transceiver - AVALA-01 from 1.5 MHz- 52 MHz

    The ADTRX-2 is a new version of my SDR transceivers ADTRX1 and ADTRX1-1. The design is based on new DR2A+ receiver version which is giving better overall transceiver specification. Transceiver is realized now as one single side PCB design with classic size through hole components..

    New mono-band SDR transceiver AVALA-01 is ADTRX-2 transceiver with built in power amplifier and band oscillator all on one board. Transceiver is optimized for work with one sound card and Duncan M0KGK software. With unique PC control setup AVALA-01 is working in all other programs and with all types modulations SSB, CW, DIGITAL....also.

HF SDR Transceievrs AVALA-01 and ADTRX2-YU1LM.pdf

 

AVALA-01 SDR transceiver first  prototype built by author Tasa YU1LM/QRP and output spectrum at 7MHz Pout=36dBm(4W)

DT2+DR2 as SDR transceiver built by Cezary SP5HTT

DT2A+DR2 as SDR transceiver built by Gerard F6BSZ