"Greg Mayman" bravely wrote to "Mike Ross" (15 Sep 03  09:14:00)
 --- on the heady topic of "VEHICLE LED'S"

 GM> Fortunately none of my amplifiers make much noise at all,
 GM> although one of them does have an audible hum if you put your ear
 GM> right on the case.

One should try to achieve a noise level at least 80db down from 1 watt
in the power amp stage after the volume control. With speakers that
output 100dB/Watt that amounts to less noise than a mosquito makes.
It basically sounds dead and unless there is a power indicating lamp one
can't even tell if the damn thing is on or off when there is no music.

On the previous battery topic, I've found that carbon-zinc batteries are
much quieter than alkaline batteries when used in condensor microphones.
The alkalines tend to make more sputtering noise which is far more
objectionable than an equivalent level of constant hiss. Is there
something to this or is it just me?


 MR> One must admit it leads to confusion to call a voltage gain stage an
 MR> "amplifier" since that is usually meant to be a P.A.

 GM> Only by people who don't understand electronics ;-)

That's about 99% of the human race, you're being an eliteist, man!

 Mike
 ****

... Is reactance then illusory?  No, it just appears that way...
--- Blue Wave/DOS v2.30