This project is in early development stage and there is no good documentation. Heavily work in progress, making prototypes etc.

Everything on this page is a subject to change!

Name SSB85 speaks for itself: 8 bands, 5 Volts minimal power supply voltage.

Ideas for the rig:

  • Mobile/field ready (lightweight, compact, SMD components).
  • Based on SSB6.1 design.
  • +5 V power supply
  • Low power consumption in RX
  • High SWR/Shorts tolerant
  • Microcontroller used to switch between frequencies
  • Low frequiencies filter
  • Friendly price
  • Bands: 160, 80, 40, 30, 20, 17, 15, 10 meters.
  • Full complete design.
  • Compatible with existing microphones.
  • Powerful enough.
  • Easy to operate
  • Guided navigation (use software to switch modulation and control modes in different bands)

Click on the image to view zoom in.

Technical characteristics

Power supply, voltage +5V..12V
Power consumption
RX <200 mA
TX < 2 A
Output power 5 W
Ham-radio bands 160, 80, 40, 30, 20, 17, 15, 10
Modulation SSB: LSB/USB, CW, AM (RX-only)
Size 55x110x160mm
Weight 0.5kg



List of amateur bands

Band Frequency Notes
160M 1.8-2.0
80M 3.5-4.0
40M 7.0-7.3
30M 10.100-10.150
20M 14.000-14.350
17M 18.068-18.168
15M 21.000-21.450
12M 24.890-24.990
10M 28.000-29.700



4 boards:

1. Main board, contains RX/TX/BPF, LF amp

2. Front panel: Screen, encoder, contorols, processor

3. Power Supply + Switches

4. Amplifier, LPF, SWR Boards connnected using I2C

Main board

Amplifier board


Synthesizer - NANODDS

This solution supposed to be budget friendly, so far total cost = $10.87.

  • Si5351A
  • 1.8 inch screen ST7735
  • Arduino Nano Getting replaced with ATMega1284P-AU. More memory = advanced software.
  • The display is connected to Arduino using SPI interface and Si5351A using TWI (I²C).

Source Code and Firmware

Power Supply and Switches




SSB 6.1 engineers, community and Nick Strong in particular for help, guides and support.

KiCAD and community for great EDA.

JetBrains for an awesome CLion IDE.

Platformio and Arduino for bootstrap code and toolchain.


You can left first comment.

For commenting you should proceed to enter or register on the site.