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My attempt at a 7mHz IC based DC Receiver from EMRFD

So I’ve followed QRP homebrew projects for quite awhile now and have done my share of kits from QRPKits and other vendors but I’ve always wanted to “scratch build” a radio, the idea of ALL of the construction and design being up to me to be more appealing… but mostly I’ve wanted the learning that comes from the mistakes and risks of homebrew.

So you might think “risks” is kind of a silly word in what amounts to a hobby, but even in a hobby I think that we as humans avoid failure and that keeps us from experiencing a kind of victory over inactivity and a kind of fear.

Great guides in homebrew are the host and co-host of Soldersmoke, William Meara N2CQR and Peter Juliano N6QW. Through their exploits and adventures I was emboldened to try my first Manhattan style build of the Mighty Mite transmitter, and after some trials I got it going and had my first success.

My next project was going to be a bit more involved, so I chose the first project from Experimental Methods in Radio Frequency Design, an excellent book or dare I say the Bible of Homebrew. The project is the IC Based 7 MHz Direct Conversion receiver.  I gathered the parts as I could from junk box and my parts drawers and when I was ready I started building it during spare moments last week.  Some of the photos are below and they chronicle my progress, set backs and headaches.  I continue to learn and as of this writing the radio does not yet work but I am undeterred.  So if you wish follow my stumbling and learning and please don’t take me as any kind of guide but perhaps just a fellow traveler.   Thanks and 73,  Dave / W2DAB.

The beginning, laying in the NE602 and the LM386, soldered directly to the mePads.



The fully populated board, which turned out to be non working due to overheating of IC chips, later I soldered in chip holders and it worked better but not fully. Below is a link to a video which has some rather pathetic sound, more to come later.








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