[R-390] 600 to 8 ohm speaker converter

[Robert P. Meadows]

The R390 series of radios have a 600 ohm audio out system to feed distribution amplifiers. 
The speakers that were used then were 8 ohm for the most part, but, driven by specific amplifiers at the point of listening to the radio.
You can properly accomplish the listening deed with for the Navy installation, acquiring an AM 215 (from memory) and speaker.
Or as most do, with limited audio signal due to the radio design, use a 600 ohm to 8 ohm speaker transformer.
R

-----Original Message-----
From: r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> On Behalf Of K PERALES
Sent: Monday, February 14, 2022 1:49 PM
To: R-390 at mailman.qth.net
Subject: [R-390] 600 to 8 ohm speaker converter

When I got my R-390 it has what I assume to be some kind of transformers to allow a modern 8ohm speaker to be hooked up.  I did not think to diagram how the wires were hooked up.  Is there any manual that tells a non-electrician how to connect these transformers to the R-390A to let me listen without headphones.

Ken