Make your own transceiver with a Dorji DRA818U or DRA818V

These modules have been around for a while, but they fascinate me. For only US $12,88 you get a fully functional 1 Watt transceiver working on either VHF or UHF. The last letter in the model number tells you which version it is. The modules are available on eBay from seller Dorjigroup (link).

Dorji DRA818U

Dorji DRA818U-Inside

Dorji DRA818U-Inside

Features sells PCBs including the DRA818 series:

Dorji DRA818U-3In combination with an Arduino you can build a full-featured transceiver.
Schematics below (courtesy

dra_arduino And how about a 16-channel version with a Nokia display attached?


It’s time to order these and do some soldering- and programming work. Maybe I go for a dual-band transceiver…

Links to documentation (PDF): DRA818U, DRA818V

For more information on finished projects go to, where you can find schematics and example Arduino code.

Time on your hands? Build a BitX20.

Once upon a time in the West, there was a ham building everything himself. It was me. Now, many decades later, all I do is repairs. Only little gadgets, such as a remote controlled timer for a repeater, are designed and built here. That’s about it.

Since this morning I’m keeping an eye on the blog of Edwin PA1ED. Just like Alex PA1SBM, he’s involved up to his ears in the BitX20 project. When I read their blogs, all that BitX20 building sometimes seems a bit of a masochistic way to kill time.

One thing is for sure, they are probably better at it than I am. I just got old and rusty. Darn.


Edwin’s BitX20 Project. Note the salvaged CB radio parts.

It’s time for me to do something similar, but can’t make up my mind yet. One of the candidates is the Youkits TJ2B. Seems like fun, and we have a Dutch distributor.

youkits TJ2B