[R-390] (no subject)

[Drew Papanek]

Rick Brashear wrote:

>I am searching for a 600 ohm to 4 to 6 ohm transformer for the audio output 
>on my R-390/URR.

You can use a 70.7 volt line matching transformer as used in PA systems.
Connect speaker to appropriate secondary impedance tap, connect radio
to 10 watt primary tap.

With secondary  terminated in its rated impedance, the 10-watt primary tap
will present a 500 ohm load, close enough.

Drew