On Wed, 05 Jul 2017 08:48:36 +0100, Bob Latham wrote:

In article ,
Don Pearce wrote:
On Tue, 4 Jul 2017 19:23:34 +0100, "Brian Gaff"
wrote:

a single transistor stage with, say an emitter follower would suffice
though these days the over designers would probably use an Ic.
Brian

I'm confused again. When I went to school an emitter follower had no
voltage gain, it had current gain for want of a better expression.

Under-designers, you mean. With an IC you don't have to do any design -
just set two resistors to give you the gain you want.

And that is exactly how I would do this - it's by far the best way.

Yes.

Use non inverting config for lowest noise and then if I recall correctly
gain = 1 + (R-feedback / R-ground). No problems as you do not require a
gain of less than 1.

And, as it's being fed from the presumed Hi-Z DIN output designed to act
as a constant current source to feed Lo-Z DIN inputs, a simple Hi-Z input
unity gain buffer amp may be all that's required to feed a mid-Z phono
input with enough signal voltage.

The only benefits I can see with the DIN standard of constant current
sources feeding low impedance inputs is the automatic muting of
interference to unused inputs and the ability to join several sources,
each with their own volume control, to a single input to provide crude
but effective audio mixing (which makes the phrase "Sound mixer with DIN
output" a little oxymoronic to say the least - perhaps such a mixer is
simply a bunch of inputs going to simple volume controls with their
outputs all wired directly to the one output socket pin?).

--
Johnny B Good