justin_o_guy2
Serious Thumper
Offline
What happened?
Posts: 55279
East Texas, 1/2 dallas/la.
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About 20 years ago I guess I came across a book called "Radios that work for free". ITs about crystal radio sets. Pics are pretty nice & I'm finally starting to work toward building one. Im gathering parts up & doing some homework online. I found an annual contest with pics up to 2011,, Im wondering if interest has died off..But, there are sites to buy parts..The book, printed in 77, points out that THE most important thing is the headphones & that theyre not made now, because they need to be as high in impedance as possible, & now, 30 ohms is High,, & we need something on the order of 4,ooo ohms impedance..& the author goes on to say that the old headsets are available, expect to pay the princely sum of 3 to 4 dollars,, well, HA!,, theyre in the $80.00 range now for those old headsets,, BUT, now there are some things made & a guy Can get mismatched stuff,, like a single speaker,, & since Im really just wanting to listen to some late nite talk radio, like Noory, I could get one speaker & stick it in a pillow & lay my ear on it, be able to hear well enough till I doze off,, So, Im thinking I can get what I need for $10.00.. I DO need some old air capacitors, like from old style radio gear, if anyone has an old dead radio & wouldnt mind gutting it or shipping it & Ill gut it, which would give me more parts , like switches & such, maybe even a matching transformer so I could run a small speaker.. So, anyone with stuff that mite be able to donate parts, Id pay some & pay freight, too. Anyone who wants to join in on a project, we could compare notes. Im wanting to build 2, at least. One for broadcast & 1 shortwave, which operates in higher ranges.
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