Re: DSB transceiver for Digital mode
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Let’s use this thread to update the status. The test is done. I have tested both 7074 and 14074 radios. I need to update PCB to include a minor fix.
I will accept order and start to ship after Hamvention in May. I have lots of work to do considering my limited spare time.
Compared with the open schematic, I have modified several areas to improve TX signal purity and frequency stability. The added VOX circuit works as planned. I understand now that the DSB circuit concept I have adopted has some potential issue to cause self-oscillating. It seems that my fix is effective and still simple.
I can build this kit in a bit more than one hour. If you take time, you can enjoy a whole evening to build and test this rig. I have to standardize the name of this rig: D4D, no matter what it was called, either DSB FT8 BD6CR, FT8 DSB VOX or else.
在 2019年4月10日，上午8:03，Adam Rong via Groups.Io <rongxh@...> 写道：