[R-390] [Fwd: Re: [Premium-Rx] Collins 390a, 600 ohm audio]

[rbethman]

f.y.i. - I have a box of NOS Hammond 39921 transformers with 600 ohm 
primary. The secondary has 6 taps. One at 9 ohms. There are taps at a 
bit over 4 and a bit over 2 ohms, plus some others. Works great for 
R-390 series, SP-600, CA-88 and others. These were made for the military 
contractor Marsland Eng. Ltd.

$12 plus shipping, which is generally about $5 in CONUS.

James A. (Andy) Moorer
www.jamminpower.com

----- Original Message -----
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