[R-390] R392 Audio

[Drew P.]

Perry wrote:

"Perhaps a simpler alternate to Charles tube re-design of the audio output
circuit would be to use one the LM series of audio output IC's.  They range
from 2 to 70 watts or so output and many have been designed for high-end
audiophile equipment so they have low THD.  Besides needing minimum
additional components to use, most are under $10.'

Simpler yet would be to bring out the audio at low level, before the R-392 output stage, and feed it to an amplified computer speaker.  Some of these sound pretty decent, at least as compared to typical communications receiver audio, and many of them use the LM series of audio output IC's.

Drew