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[time-freq] RE: time-freq Digest, Vol 11, Issue 4

John Ackermann N8UR jra at febo.com
Sat Sep 9 11:59:52 UTC 2006


John Ackermann N8UR said the following on 09/09/2006 07:55 AM:

> So... if you need maximum output, making R4 smaller and/or the R1/R8
> combination larger (they both need to be the same value) can almost
> double the output level.  As a suggestion, changing R4 to 1k and R1/R8
> each to 47k would result in a signal drop of only 1/32.  (I think that
> 47k will still provide a stiff enough bias, but we need to test that to
> be sure -- if the output waveform starts clipping when it didn't before,
> that means that R1/R8 are too large.)

And, actually, the 100k R6 is superfluous since the smaller R8 is really
establishing the input impedance.  May as well just leave it out and
improve the divisor ratio a bit more.

John





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