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Sunday, December 3, 2017

Discrete Ceramic 40 Meter Direct Conversion Receiver in Action (Video) -- BUILD THIS THING!



I've been holding off on making this video until I improved the stability.  N6QW is vigilent!  I only did this video after certifying that it meets the Juliano Stability Criteria.  I had to dispense with the polyvaricon and go with an air variable. 

We will be talking about this on the SolderSmoke podcast next weekend.  I hope to put on the blog  a stage-by-stage discussion of how to build this receiver.  

The dial from HI8P and the knob from a SW receiver that Elisa gave me definitely add soul to this new machine.  

JOIN THE RANKS OF THE TRUE HOMEBREW RADO MAKERS!  BUILD A RECEIVER!  BUILD ONE OF THESE!  

6 comments:

  1. All that hiss! Try a simple low pass audio filter. Eg 100nF or so across the volume control or even a capacitor across the audio output connection. The top right of the front panel is also crying out for an RF gain control!

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  2. si5351, si5351, si5351, si5351.......

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  3. Awesome Bill, and pretty stable, I've been working on similar designs: DC receivers with VXO's or LC VFO's and as suggested by Peter Parker a low pass filter does wonders on these things. the ones on SSD Page 82 are a bit more inolved but work relly well, much easier to tune without hearing all those high frequency audio components from all over the band. 72 and FB Bill, Dan -HK4DEI.

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  4. Nice job as usual Bill.I hope u can publish your design soon. I am sure many of us are eager to replicate it. Best 73 de AJ4BP

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  5. Hi Bill,

    Very Nice indeed and you get the quality "passed" sticker for having a rig as stable as a Si5351. Wow -- with a bit more work you could turn that into a Superhetrodyne Receiver and then with a few more parts a full fledged SSB transceiver. How cool would that be?

    Nice looking box -- ala retro 1940's 50's.

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