This is a really nice DSB transceiver in progress. Below you see the modules, above you see how the modules will fit onto the board.
DOUBLE sideband is a mode too often dismissed by potential builders. Sasho shows that it is indeed a practical and relatively simple way to get on phone. Sasho has been using these rigs on Parks On The Air operations.
The modular approach is admirable.
Sasho writes:
Hello Bill,
This is a DSB radio design by R0AHZ using NE612 chip as mixer on receive and transmit.
Audio amp is LM386.
Frequency generation is by arduino nano and si5351
RF power amp consists of 2n3553 or any npn eqivalent as pre drive and BD139 as final. Power is about 1 to 2 watts max. I use it together with my power amp and I measure about 40 watts on tx.
Here is a link of me making a QSO wih it.
https://youtu.be/0GKlVfAPgV0?
73 de Z33ST
This is a DSB radio design by R0AHZ using NE612 chip as mixer on receive and transmit.
Audio amp is LM386.
Frequency generation is by arduino nano and si5351
RF power amp consists of 2n3553 or any npn eqivalent as pre drive and BD139 as final. Power is about 1 to 2 watts max. I use it together with my power amp and I measure about 40 watts on tx.
Here is a link of me making a QSO wih it.
https://youtu.be/0GKlVfAPgV0?
73 de Z33ST
Thanks Sasho!
Sasho on POTA
I have to figure out how to design with "striphattan!" --Kirk, NT0Z
ReplyDelete"Striphattan"-(you coined a good descriptive term, NT0Z) , is so abundant, and easy to use. We should be using it more often.
ReplyDeleteDSB? Let's go to Proceedings of the IRE, December 1956, Super Classic issue on Sideband Methods. Check out Dr. John Costas paper :
https://www.navy-radio.com/rcvrs/frr48/Costas-IRE_Dec1956.pdf
Now generating DSB-SC is super easy. Receiving with an SSB receiver is also easy, but receiving both sidebands helps reduce interference. Think of what new (and cheap) devices we have now that they didn't have back in 1956. We can homebrew following the analog method in the paper, or use various DSP methods. Either one should be easier (and way lighter) than what he had to work with! 73 WN2A