Simon D. Williams wrote:
On Sun, 4 Dec 2005, Simon D. Williams wrote:For reasons that probably should remain a mystery, I'm trying to "cross-over" the cassette I/O ports on a pair of IIes... the immediate problem is that the output is at line level and the input expects a much higher level, so I need to amplify the signal. Is it possible to make a very small amplifier to achieve this?Forget that last sentence... obviously it's possible. The question should be: how can it be done simply and cost-effectively?
If you'd rather buy the parts at Radio Shack than buy the assembled unit, then you are looking for a microphone pre-amplifier circuit. Google should turn up dozens, and you can take your pick--discrete transistors, IC op-amp, single-voltage supply, split supply, etc. Frankly, unless you really like to build things, buying a pre-amp or mic-input mixer--or picking up a used cassette recorder at Goodwill--is the simplest way to go. -michael Music synthesis for 8-bit Apple II's! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it is seriously underused."