µBITX

I picked up a µBITX transceiver from hfsignals.com (aka Micro Bitx) version 3 to play with.  I thought it would make a good radio for digital modes and maybe use it portable.  There are many web sites describing the radio, so I won't duplicate all of that here.
The neat thing is that the RF section is pre-wired yet it allows for easy modifications.  Since it uses an Arduino and the software is freely available, it is a good platform for playing.  There are many posts on ubitx.net that describe how others are modifying (and fixing) the original design.
The included LCD display is adequate and there are some impressive user mods available but I really want to be able to run it headless. Since I already have an Elecraft K3, I decided to implement a subset of their command set (which is similar to the Kenwood TS-480 commands).

A few mods

Things I did to my µBITX:

• Spectral purity updates including relay replacement
• N8DAH AGC mod
• Use 2nd half of audio amp for digital mode RX
• Added a subset of the K3 CAT commands (TS-480 command set) & got computer control working with WSPR-X and fldigi

Next items:

• Audio pop fix
• SOTA Beam digital audio filter
• Single USB interface for sound card and CAT control
• Figure out why power output for 18 MHz and higher is low 
• Design a hardware interface for the radio that allows different user interfaces to be plugged in
• Put it in a case

FT-8

WSPR