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Hi all, I like tube technology and building my own things, despite all the people who ask why I don't just go buy something instead. A lot of people on the internet want their hands stapled to their

Mike, The cost of a DDS VFO is about 130ma of additional power consumption over the VFO version than can run on small battery for a long time. Allison

"And you can build this basic design with a single crystal at the expense of wider skirts on the IF filter. But you might be able to do RTTY with 170Hz shift." OK a few things the filter in there can

Hello everyone, Thank you for joining this group! I am new to being an admin of a groups.io group, but not to groups in general. If you see something that needs to be changed, feel free to comment

Bob, I was responding to Gary WB6OGD when he said "On the other hand if you are adding a VFO to a NC-40 I don't know why...? the NC-40 is amazingly stable and usable." He says he doesn't know why one

DXpeditions and DX in general sometimes hang out down there. I like the Novice band Frequency agility is a nice thing to have But a DDS VFO that covers everything very inexpensively and very

You could replace the crystal filter with a LC filter if you want wider BW. And you can build this basic design with a single crystal at the expense of wider skirts on the IF filter. But you might be

That wouldn't be a problem using a DDS VFO. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark"

My NC-40 (homebrew copy) tunes 7014-7066.? Below that they go too fast for me, above that is only the digital modes and the novice band.? NC-40 filter is too narrow for SSB (though I have listened

7000 kHz to 7300 kHz? My Wilderness NC40A only covers about 40 kHz.

What do you mean by "FULL BAND COVERAGE"? Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark"

There is no reason the 49er VFO could not be made to work with any of the NorCal transceivers. I have several NorCal40 boards and the boards for a NorCal Sierra. I have suggested to Jack that he make

Here is the link - http://iq-technologies.net/projects/rf/007/index.html

Full band coverage would be nice.

The Si5351 solution is very good. Cost (from ebay, including shipping) estimate: Si5351 board?? $4 Arduino??????????? $3 LCD??????????????????? $3

Hi there, If you’re willing to go to the FM broadcast band, a search for “The Radioshack Special” will turn up an interesting superregenerative circuit with ?one active device and a LM386. Easy

Are you talking about the Jack Purdum / Farrukh Zia board? If so Jack mentioned in the SoftwareControlledHamRadio group that there are lots of boards out there based on their design. Might be worth

Arduino (uno or nano) , SI5351(many sources), 2 line by 16 char LCD(many many sources). That will do it all very acceptable and the code to do that is out there.? Its good to VHF. The ad9850 is a

Hi Differences among other things: - A DDS is way faster than a synthesizer - A DDS has, often, better frequency resolution This being said if the choice is between an AD9850 and the Si5351A I will

Why does that matter? It accomplishes the same thing if you use the digital output of the 9850. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark"