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Old 11-13-2007, 04:37 PM   #1
hamtronix
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Default Small/tiny pre amp for RCA Audio out
Can anyone recommend a small - prefer battery power - pre amp for the audio out on the amiga as a go between it and my TV?
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Old 11-14-2007, 02:33 AM   #2
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Default Re: Small/tiny pre amp for RCA Audio out
What kind of target audio level are you after?? The line output from the Amiga is approx 1V RMS which is a fairly standard input level for most TVs, amplifiers, etc.

Or is the output impedance of the Amiga a problem? It's 1k ohm, so if you connect a 1k ohm load to this, the AC voltage halves. Most TVs and amplifiers have an input impedance of 10k-47k ohms though, so that's unlikely to be a problem.

From a 9V battery, you could easily build a small amplifier capable of a voltage gain of 10dB (3 times, so for a Vin of 1V then Vout = 3V RMS).

If you want to have a go at building something yourself, I can scribble something up and shove it in the scanner for you.
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