This month I completed the build of a 40m Bitx trx to take along when on holiday. Output is 5 Watts.
I ordered mine here.
Apart from this you need also need a case.
There is a very active forum on this kit here.
The kit is SSB only, no CW. BUT Jerry – KE7ER – posted his CW mod in the forum so now mine can do CW as well. Thanks Jerry !
The VFO is made around an Arduino Nano and a Si5351A chip, the combo is called Raduino and ready to use.
The Raduino comes with v1.01 installed. On the forum Allard PE1NWL – posted v1.09 in which he implemented
- switch between VFO a and B,
- use RIT,
- switch between USB and LSB,
- easily calibrate the VFO for both sidebands.
Thanks Allard !
I also installed an CW audio filter, i ordered this one
After building everything in the box, the unit received o.k. but had no output power. Transistor Q13 turned out to be defective.
Luckily we have a small electronic parts shop here in Harderwijk with a great selection of all sort of components and a guy who knows his stuff, so a replacement transistor was no problem.
Teun the owner also had a retro handmike in his shopwindow.
For 2 euros you can’t go wrong…
After replacing the tranistor the output power was 5 Watts, enough for most european QSO’s.
All in all it was fun to assemble, and is fun to operate.