The HF all-band homebrew transceiver by jg1ead

The home made transceiver covers 3.5 to 3.6 MHz and is CW only. It has the following features:

Characteristics and composition:

• Frequency coverage : 3.5MHz-28MHz 8band
• Mode : SSB/CW
• TX-final : 2SC1947
• Power output : 1W
• RX-RF amp : 2SK125*2(Grounded Gates)
• 1stIF : 48.7265MHz
• TX/RX 1st mixer : MiniCircuit MCL-1
• RX 1st IF amp : MC1350P
• 2ndIF : 11.2735MHz
• TX/RX 2nd mixer : MiniCircuit MCL-1
• RX-2nd IF : MC1350P*2

Schematics diagram are available: homebrew transceiver

T03DSP High Performance Transceiver with DSP IF processing

The goal of this project was to build a high performance HF transceiver with DSP IF processing. I did not try to archive as high parameters as possible, I just tried to get most from the available technology (i.e. mechanical and electrical parts and assembly technology). I tried to keep the design as simple as possible. The design widely uses “software” techniques that allows easy modifications and opens new possibilities.

Features

• Amateur radio bands (160m,80m,40m,30m,20m,17m,15m,12m,10m)
• 0.25 Hz and more (two tuning speed for each mode is available), implemented adaptive tuning step (1x..20x)
• USB, LSB, CW (Normal/Reverse), AFSK, RTTY (decode only by now), (PSK31 with decoder and coder will be implemented in software later)
• Selectivity 100Hz-3000Hz bandwidth in 50Hz steps
• Automatic memory keyer (built in)
• Automatic contest number generation, 5 different number formats available
• Digital RX:S-meter and calibrated input signal power meter
• Digital TX:Output power, SWR and compression (displayed simultaneously)
• 24h real time clock (powered from ionistor during power off periods)
• AFC and tuning indicator in RTTY mode
• Adjustable voice operated squelch for SSB mode
• CAT system compatible with Kenwood command set
• Built in dual tone generator for transmitter testing

T03DSP audio amlifier

Transceiver DSP

Transceiver display

Schematics diagram are available: High Performance Transceiver

The HF all-band homebrew transceiver by jg1ead

The home made transceiver covers 3.5 to 3.6 MHz and is CW only. It has the following features:

Characteristics and composition:

• Frequency coverage : 3.5MHz-28MHz 8band
• Mode : SSB/CW
• TX-final : 2SC1947
• Power output : 1W
• RX-RF amp : 2SK125*2(Grounded Gates)
• 1stIF : 48.7265MHz
• TX/RX 1st mixer : MiniCircuit MCL-1
• RX 1st IF amp : MC1350P
• 2ndIF : 11.2735MHz
• TX/RX 2nd mixer : MiniCircuit MCL-1
• RX-2nd IF : MC1350P*2

Schematics diagram are available: homebrew transceiver

T03DSP High Performance Transceiver with DSP IF processing

The goal of this project was to build a high performance HF transceiver with DSP IF processing. I did not try to archive as high parameters as possible, I just tried to get most from the available technology (i.e. mechanical and electrical parts and assembly technology). I tried to keep the design as simple as possible. The design widely uses “software” techniques that allows easy modifications and opens new possibilities.

Features

• Amateur radio bands (160m,80m,40m,30m,20m,17m,15m,12m,10m)
• 0.25 Hz and more (two tuning speed for each mode is available), implemented adaptive tuning step (1x..20x)
• USB, LSB, CW (Normal/Reverse), AFSK, RTTY (decode only by now), (PSK31 with decoder and coder will be implemented in software later)
• Selectivity 100Hz-3000Hz bandwidth in 50Hz steps
• Automatic memory keyer (built in)
• Automatic contest number generation, 5 different number formats available
• Digital RX:S-meter and calibrated input signal power meter
• Digital TX:Output power, SWR and compression (displayed simultaneously)
• 24h real time clock (powered from ionistor during power off periods)
• AFC and tuning indicator in RTTY mode
• Adjustable voice operated squelch for SSB mode
• CAT system compatible with Kenwood command set
• Built in dual tone generator for transmitter testing

T03DSP audio amlifier

Transceiver DSP

Transceiver display

Schematics diagram are available: High Performance Transceiver