"Nick Gorham" wrote in message
...
Dave xxxx wrote:
This guy has two Quad 306 amplifiers, he has a pre amplifier sending a
signal to the left of each in his own words

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I'm putting the left pre out into the 'left' of quad 306 no.1 and
connecting the speakers to the left out of quad 306 no.1

then the right pre out into the 'left' of quad 306 no.2 and connecting
the speakers to the left out of quad 306. no 2

dummy loads on right speaker terminals. the power LED is connected to
the power rail of the right channel inside the quad 306. nasty noise,
which is why I'm not using the channels marked right. may as well label
them fred and barney. so I'm using the fred channel from both amps only
and not the barneys.


any comments ?



Well my phono stage has 6 LED's in it in the constant current sources, I
can't hear any sign of them producing a "nasty noise".

If it was a neon then I would be prepared to consider it could have a
effect. Maybe the chap read about the noise that neons produce and assumed
it was the same?

--
Nick

A Power status tell-tale LED running at about 6-10mA with a series dropper
never caused me any discernible noise!!
Yours must be arising from some other cause. How clean ripple-wise is the
PSU at cap?
Any cct taken off a common DC rail (pos or neg) ought to be decoupled
decently.
Jim