http://home3.netcarrier.com/%7Elxh2/tapesat2.gif
I found this interesting little circuit amongst some old bookmarks and was thinkin' it'd be handy for adding tape m0j0 to those new fangled 4 track digital recordings (and a good way to use up some junker germ trannies). However I can think of two concerns:
1) Mic/Line: I'm guessing this circuit is for line level signals. Does that mean it needs a mic pre added to the front, or could the first opamp be rigged as an unbalanced mic pre? Another idea could be to double the circuit and use it as a stereo mixdown effect instead.
2) Power Supply: A +/-15v supply is specified...what a pain! I could get away with just using a 9v battery and connecting a bias voltage through a 1M resistor to the non-inverting inputs of each opamp, right?
thanks.