[Premium-Rx] Collins 390a, 600 ohm audio

[Blair Batty]

Hi Guys:

I suppose my Collins 390A receiver wouldn't qualify as a
premium receiver now, but it was, in its day; it seems to
me to outperform my Harris 590.

Anyway, I have an audio question, which may also apply
to other receivers. It has a headphone jack (600 ohm) on
the front panel. It is also duplicated on the back, plus
a 600 ohm speaker output. There is also an independent
600 ohm output for a remote audio.

1) How do I use ordinary "stereo music" headphones (~8 ohm?)?

2) How do I use an 8 ohm loudspeaker?

3) How do I connect to the high impedance "line input" of an audio mixer?

Thanks
Blair

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