Re: [Elecraft] OT: Cristal Sets

2013-07-25 Thread David Gilbert
Actually, I'm pretty sure the crystal set you are referring to used a piece of galena (a lead sulphide compound), not germanium (and not geranium, which is a flower). Early crystal sets used a piece of springy wire called a cat whisker to contact the galena at a sometimes

Re: [Elecraft] OT: Cristal Sets

2013-07-25 Thread Geoffrey Mackenzie-Kennedy
When I lived in Africa, Galena was used in the crystal sets which some of my friends and I built during the very early 1940s. Galena could be found in some outcrops of rock, many of which were present in our garden. Finding the sweet spot for the cats whisker could be difficult. Although at

Re: [Elecraft] OT: Cristal Sets

2013-07-25 Thread stan levandowski
When I was 10 years old (55 years ago), I found a child's picture book in the library that showed a copper penny, a safety pin, and a wire coil mounted on a piece of wood.  I had no particular interest in radio or science at that time but this book appealed to me.  I borrowed the book, went

Re: [Elecraft] OT: Cristal Sets

2013-07-25 Thread artus
I had an aunt that lived with my grandma. They slept in the same bedroom and she wanted a radio to listen to without bothering her mother. We got a crystal set from Burstein Applebee and I hooked it up for her -- It worked. I think I was in the 6th or7th grade. I seem to also remember a

Re: [Elecraft] OT: Cristal Sets

2013-07-25 Thread Philip Townsend Lontz
Fox Hole radio... I helped a pre med student build the radio for one of her science projects a few years ago... It worked! And she got an A for her project. She is now a fine Doc with 3 great kids! Non judgment day is near. On Jul 25, 2013, at 8:27 AM, artus 9ar...@gmail.com wrote: I had