开云体育

I read the QST article and while it looks like a good project to learn about controlling DDSs with Arduinos, I was not too impressed with the RF part.

My plan is to get all the DDS & Arduino & LCD & encoder stuff together and couple it to a homebrew MMR40 radio.

While the MMR40 is a little more expensive in parts and more involved?construction, it also has more useful features - single signal reception and supports both SSB & CW operation at 5 watts output.

The software challenge will be to modify the controller to operate the DDS at ~ 3 MHz for the LO to run the radio. Enhancements could be adding band memories to move quickly from the CW to SSB parts of the band and a digital interface for PSK and/or JT-65 modes.

I will be looking at FDIM & Hamvention to see if I can get all the controller parts together.

I would really like to find a single source for all the controller stuff.

I have most of the radio parts together but will still be looking for some items to complete the list.

Here is a link to homebrewing a MMR40:

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73 - Dave, N4ELM

Thanks Jack!

Good info on the page and I ordered a PCB kit.

Now just need to find the other parts.

I should see you at FDIM.

I've signed up for all the?activities.

I'll be the older pudgy, grey haired guy with a bald spot :-)

73 - Dave, N4ELM

Well, my update is that I made it back from FDIM and have been checking out some new toys.

I ordered the remaining parts/modules for the DDS VFO and should have all that in a few weeks.

In the meantime, I'll be finish getting the parts together for the MMR 40.

The plan is to get the NANO/DDS VFO running, build the MMR 40, then put them together.

The integration will require changes to the code to have the DDS generate the ~3 MHz VFO signal and display the 7 MHz operating frequency.

Stay tuned for more updates.

Dave, N4ELM