| The Breakroom > The Water Cooler |
| Unexpected weirdness... |
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| chipenter:
Planet rock I thought that died will have to retune , Alis Cooper as a DJ was cool . |
| AdeV:
--- Quote from: russ57 on March 18, 2018, 12:00:51 AM ---Congratulations, you made an amplified crystal set. ( remember them?) --- End quote --- Coooool! Yes, I remember them (I never made one, though, sadly). Until now, that is :zap: --- Quote from: russ57 on March 18, 2018, 12:00:51 AM ---A 'dirty' joint, with an oxide layer between, will act as a rectifier. (metal oxide rectifiers were common in battery chargers, welders, etc). A blued razorblade can be used to make a crystal set. The partially plugged cable must have made a semiconducting joint, and a local station strong enough to create enough audio. --- End quote --- I'm surprised at that. I thought the purpose of the crystal was to set the frequency you were tuned to? --- Quote from: chipenter on March 18, 2018, 03:59:00 AM ---Planet rock I thought that died will have to retune , Alis Cooper as a DJ was cool . --- End quote --- It's on DAB only as far as I'm aware. Along with a whole load of other "genre" stations - my wake-up-to station is "Absolute 80s". It's also crystal clear, unlike any FM station around here, which tends to fade in & out. |
| russ57:
A typical crystal set has a coil and a capacitor which set the frequency. Adjusting one or the other 'tunes' it. The diode acts as a demodulator, extracting the audio from the Rf carrier. Works great for am, tolerably well for fm. Dab not a hope... Am can cover long distances. So not necessarily a local station, especially with an amplifier in the picture. I remember reading of people where a metal tooth filling acted as both the demodulator and the speaker. Russ |
| JD:
Yep planet rock is still alive and kicking on DAB radio :headbang: A good mix of all ages, AC/DC thru Slip Knot up to today's Rock/Metal :thumbup:. JD |
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