ElectronicsFilter: Help me figure out what might be wrong with my son's "safe, solderless, exciting, educational and fun!" AM/FM radio kit. [more inside]
posted by jquinby on Mar 20, 2009 - 6 answers

Where can I buy a discontinued 11C90 650 MHz prescaler? This is for reverse engineering a SR-2020 mystery receiver that a friend of mine has been working on. Any information on this will be very much appreciated. Bonus hand drawn analog circuit diagrams. [more inside]
posted by mikw on Mar 13, 2009 - 3 answers

(Electronics|Stereo)filter: What is causing this infuriating noise in my preamp and how do I fix it? Links to sound files and long list of symptoms in extended. [more inside]
posted by strangecargo on Jan 15, 2009 - 6 answers

I need a manual for a Panasonic VP-8121B AM-FM Stereo Signal Generator. [more inside]
posted by kc8nod on May 29, 2008 - 2 answers

Ipod Device Filter: I am looking for an ipod alarm clock that has a jack for an external speaker or headphones on it. Input jacks? Sure. Output that's NOT usb? Not so much. I haven't found one yet after an hour of looking. Does such a thing exist? [more inside]
posted by rileyray3000 on Jan 29, 2008 - 3 answers

What components do I need to buy to have a solid stereo system for my home? [more inside]
posted by 10ch on Nov 20, 2007 - 19 answers

How can I test whether something (like a cold water pipe) is a ground? [more inside]
posted by blisterpack on Jul 25, 2007 - 7 answers

We're thinking of buying my dad a Ham Radio for Christmas. I know nothing about them and don't know where to even start. Help! [more inside]
posted by fionab on Dec 7, 2005 - 9 answers

I need to boost the range of a FM transmitter from CCrane. Folks on Amazon suggest... (more inside) [more inside]
posted by jwells on Dec 13, 2004 - 3 answers

Electronics filter: Need to build something that'll light up different LEDs via radio frequency. Must be compact and battery powered. My electronics-fu is pretty good, but I'm not sure it's this good... [mi] [more inside]
posted by SpecialK on Aug 9, 2004 - 16 answers